kobayashimaru Posted August 8, 2015 Share Posted August 8, 2015 Greetings! I am just starting out working on my 401 nailhead and I realized something. While I know how its put together, and we all know that its easier to take something apart than to put it together again, there is still a lot I don't know. Once the cylinder head is off, my knowledge ends. When it comes to machining things, grinding crankshafts and doing performance upgrades, I am lost.I am wondering if anyone here can recommend a book or a website that I can read and learn about this stuff.Thanks in advance Joe Link to comment Share on other sites More sharing options...
JamesBulldogMiller55Buick Posted August 8, 2015 Share Posted August 8, 2015 I don't know a lot about rebuilding engines. It's been thirty years and I've forgotten most of what I knew.But, I do remember that Buick engines should be put together at specifications (tight) Not like Chevy, put together loose and adjusted after it's running Link to comment Share on other sites More sharing options...
CarlLaFong Posted August 8, 2015 Share Posted August 8, 2015 ^^^^^How do you "adjust" tolerances after an engine is running???^^^^^^All engines should be assembled at factory established tolerances. If it calls for a certain rod and main bearing fit or piston to wall clearance, then that's it. You cant go back and loosen or tighten thing up a bit unless, maybe, it's valve clearance 2 Link to comment Share on other sites More sharing options...
capngrog Posted August 8, 2015 Share Posted August 8, 2015 ^^^^^How do you "adjust" tolerances after an engine is running???^^^^^^All engines should be assembled at factory established tolerances. If it calls for a certain rod and main bearing fit or piston to wall clearance, then that's it. You cant go back and loosen or tighten thing up a bit unless, maybe, it's valve clearance That's what I thought he meant too. Valve clearances can be adjusted on a running Small Block Chevy engine. I hear it's the same for the big blocks, but I've never messed with those. As you pointed out, other clearances are adjusted as the engine is assembled. Cheers,Grog Link to comment Share on other sites More sharing options...
John348 Posted August 9, 2015 Share Posted August 9, 2015 (edited) As I recall there is NO adjustment in the Buick nail head design out of the factory. I am pretty sure the valve tips have to be ground to a specific height. The head was rebuilt and this was not done correctly and created a problem for us. The rockers had no adjustment and sit on a rocker shaft. The cure was simple but expensive, there are aftermarket adjustable push rods that I found and the problem was cured. They do get built tight Edited August 9, 2015 by John348 (see edit history) Link to comment Share on other sites More sharing options...
MikeC5 Posted August 9, 2015 Share Posted August 9, 2015 Really no adjustment? How strange. An early manifestation of bean-counteritis? Link to comment Share on other sites More sharing options...
John348 Posted August 9, 2015 Share Posted August 9, 2015 The AMC V-8's 304, 360, 401 were the same way also Link to comment Share on other sites More sharing options...
DonMicheletti Posted August 9, 2015 Share Posted August 9, 2015 There is no need to "adjust" or grind anything - the engine has hydraulic valve lifters. The parts are machined so the lifters do all the adjustment. Link to comment Share on other sites More sharing options...
JamesBulldogMiller55Buick Posted August 9, 2015 Share Posted August 9, 2015 ^^^^^How do you "adjust" tolerances after an engine is running???^^^^^^All engines should be assembled at factory established tolerances. If it calls for a certain rod and main bearing fit or piston to wall clearance, then that's it. You cant go back and loosen or tighten thing up a bit unless, maybe, it's valve clearanceright.It's the valve clearance I that I had in mind Link to comment Share on other sites More sharing options...
JamesBulldogMiller55Buick Posted August 9, 2015 Share Posted August 9, 2015 There is no need to "adjust" or grind anything - the engine has hydraulic valve lifters. The parts are machined so the lifters do all the adjustment.trueThe lifters have to be matched to the head.Any milling of the head will require a set of lifters of different length. Link to comment Share on other sites More sharing options...
JamesBulldogMiller55Buick Posted August 9, 2015 Share Posted August 9, 2015 As I recall there is NO adjustment in the Buick nail head design out of the factory. I am pretty sure the valve tips have to be ground to a specific height. The head was rebuilt and this was not done correctly and created a problem for us. The rockers had no adjustment and sit on a rocker shaft. The cure was simple but expensive, there are aftermarket adjustable push rods that I found and the problem was cured. They do get built tight right.This is a common mistake by builders uninitiated with nailheads Link to comment Share on other sites More sharing options...
JamesBulldogMiller55Buick Posted August 9, 2015 Share Posted August 9, 2015 Really no adjustment? How strange. An early manifestation of bean-counteritis?Actually it was the engineers having their way over the bean counters. Link to comment Share on other sites More sharing options...
JamesBulldogMiller55Buick Posted August 9, 2015 Share Posted August 9, 2015 (edited) Greetings! I am just starting out working on my 401 nailhead and I realized something. While I know how its put together, and we all know that its easier to take something apart than to put it together again, there is still a lot I don't know. Once the cylinder head is off, my knowledge ends. When it comes to machining things, grinding crankshafts and doing performance upgrades, I am lost.I am wondering if anyone here can recommend a book or a website that I can read and learn about this stuff.Thanks in advance JoePost your question in the Buick forum on this same site. "Buick Post War"You're sure to get some folks familiar with the nailhead there Edited August 9, 2015 by JamesBulldogMiller55Buick (see edit history) Link to comment Share on other sites More sharing options...
CarlLaFong Posted August 9, 2015 Share Posted August 9, 2015 Post your question in the Buick forum on this same site. "Buick Post War"You're sure to get some folks familiar with the nailhead there trueThe lifters have to be matched to the head.Any milling of the head will require a set of lifters of different length. right.It's the valve clearance I that I had in mind right.This is a common mistake by builders uninitiated with nailheads Actually it was the engineers having their way over the bean counters. Post your question in the Buick forum on this same site. "Buick Post War"You're sure to get some folks familiar with the nailhead thereYou should use the multiquote feature. Link to comment Share on other sites More sharing options...
JamesBulldogMiller55Buick Posted August 9, 2015 Share Posted August 9, 2015 multi quote ,That;s a neat trick ! Link to comment Share on other sites More sharing options...
John348 Posted August 10, 2015 Share Posted August 10, 2015 (edited) trueThe lifters have to be matched to the head.Any milling of the head will require a set of lifters of different length. Like I mentioned in an earlier post I did not recall the exact reason for the problem, now that the milling of the heads was mentioned it came back to me. I came into the project after the engine was built but running like crap. I think the adjustable push rods really did the trick, and with less margin for error, and they were the way to go. Just as an option to know they are available if needed. I was told there was some sort of circle track class where the cars have to weigh over 4,000 lbs and have a non adjustable valve train. These push rods are able to give them the valve lift they need. It is cheating. Anyway to the OP, have someone help you out with the rebuild who has is familiar with Buick engines, there are a few quirks like the valve train an experienced eye will help you overcome http://nailheadbuick.com/nailhead-speed-secrets Edited August 10, 2015 by John348 (see edit history) Link to comment Share on other sites More sharing options...
Guest Majordan Posted August 10, 2015 Share Posted August 10, 2015 I'm screwing around with Motors all the time. No formal training - not a job, but just for fun. 1. Get the shop manual - MUST HAVE2. Order the basic engine rebuilding video from Boxwrench - MUST HAVE3. If there's a specific manual for overhauling your engine get it, but 1 and 2 are probably enuf. 4. Find a reliable/experienced speed shop in your area.5. Take photos of the motor from every angle.6. Tear down the motor systematically (Boxwrench walks you right thru it) memorializing each step with more photos. * Wire tag bigger parts * Nuts, bolts,washers, screws go in a zip-lock plastic baggie. Mark each bag with a sharpie.7. Once you've got a clean block and stripped down the heads send em off with the crankshaft to the speed shop and get em magnafluxed (checked for cracks)8. You, like me, probably do not have your own machine shop. The speed shop will assess your engine and make recommendations about boring cylinders, porting heads, valve jobs, and balancing cranks. 9. The will order valves, pistons, cams, etc.... to conform to your newly machined parts, OR, get the specs from them and order your own. I think some companies make stuff better than others and mix and match10. Now its decision time. Do you get your block, heads, crankshaft back from the shop and reassemble everything with your brand new boxes of parts and gaskets, or do you let the speed shop assemble the short block - hang pistons on rods, install crank and rotating assemblies, cam bearings and cam. * I've done it both ways on a number of motors. 327's, 350's, 283's seem a little more forgiving with a corresponding lesser chance of screwing up. Anymore, I let the speedshop do the basic rebuild most of the time as the reassembly isn't that expensive. 11. Back in the day, I rebuilt carbs, starters, generators, water pupms and oil pumps. Kits were cheap and I fixed em whether they needed it or not. Now days, I usually clean up the starters and generators and have the old guy down at the fix-it shop put em back together, or exchange my core for a rebuild on Ebay or any number places on the net.12. I've had real good luck with Eastwoods paint products.13. If you don't have a lotta tools - Boxwrench gas an index that tells you everything you'll need and why.Nuthin looks cooler than a freshly rebuilt motor and an appropriately painted block. I just finished a 62 390 Cadillac V8, and now I'm starting a 65 Corvette 300hp 327 and a 1953 straight 8 out of a Pontiac. Link to comment Share on other sites More sharing options...
edhd58 Posted August 10, 2015 Share Posted August 10, 2015 A lot of early engines, I am finding had no "adjustment". The valve adjustment was to grind the lifter, and once you went to far, you bought new ones and started over. I agree completely with "get the manual". I found on my Ford, several different specs depending on what site you were on. I got the Ford book from that era and am using it. And be willing to talk to whomever you need to, it so happened I needed to talk to a Ford tractor guru about my oil pump. The guys on this site have and will be of great help to you, they have been for me. There's a wealth of knowledge here. Majordan is right in all his steps, either way you go, you may have to open your motor back up, I did, it happens. That's why the book is great, you're ready for whatever comes your way. Link to comment Share on other sites More sharing options...
JACK M Posted August 10, 2015 Share Posted August 10, 2015 I have NEVER heard of grinding a lifter. Maybe machining a lifter, but it has to be hardened and I have never heard of that either.Adjustable push rods are common. As are aftermarket rockers for some engines that will allow adjustment. Link to comment Share on other sites More sharing options...
John348 Posted August 10, 2015 Share Posted August 10, 2015 Major Dan had hit it pretty much on the head, but one thing I would like to add that is very important. Certain things like bearing caps have to go back in the same location they came from and direction they were facing. Identify them as to where they belong with something that will not wash off, I use a small punch and place a "dot" on each cap to represent the location as to where they came off. Link to comment Share on other sites More sharing options...
capngrog Posted August 10, 2015 Share Posted August 10, 2015 I have NEVER heard of grinding a lifter. Maybe machining a lifter, but it has to be hardened and I have never heard of that either.Adjustable push rods are common. As are aftermarket rockers for some engines that will allow adjustment. I'm not all that experienced, but I agree with Jack M. Lifters, as are all components that have to endure heavy loads, are surface hardened, and grinding (even machining) would remove that hardened surface. I'm not sure the average amateur mechanic would have the knowledge or equipment to appropriately surface harden metal. Just my opinion,Grog Link to comment Share on other sites More sharing options...
edhd58 Posted August 11, 2015 Share Posted August 11, 2015 Jack M, you are correct, the term is machining. My 6 cyl flattie had non adjustable lifters which the machine shop that did the rebuild said they could machine to accommodate the 0.040 that was machined off the block/head, we opted for the adjustable lifters instead. Link to comment Share on other sites More sharing options...
Chris Bamford Posted August 11, 2015 Share Posted August 11, 2015 (edited) I have NEVER heard of grinding a lifter... Me neither, but Model T Fords did not have adjustable lifters (of course most rebuilt T engines do now) and the valve stems were to be ground as necessary to get the factory-recommended clearance of "a thin dime" — roughly 0.030" Edited August 11, 2015 by Chris Bamford (see edit history) Link to comment Share on other sites More sharing options...
61polara Posted August 12, 2015 Share Posted August 12, 2015 Guys, lets get back on topic. The guy didn't ask about lifters, but learning to rebuild an engine. I suggest looking at a community college. Many offer a class in engine overhaul. I took one and it was a great experience. We had to tear down, measure, reassemble and start three engines to pass the class. As you could imagine, most of the wear was in the bolt holes from repeated tear downs. Good luck on your 401. Link to comment Share on other sites More sharing options...
JACK M Posted August 12, 2015 Share Posted August 12, 2015 I have heard of shortening valve stems. Link to comment Share on other sites More sharing options...
John348 Posted August 12, 2015 Share Posted August 12, 2015 I have heard of shortening valve stems. Agree, that was the cure I was told until I came across the adjustable push rods, nobody ever mentioned the lifter solution at that time Link to comment Share on other sites More sharing options...
CarlLaFong Posted August 12, 2015 Share Posted August 12, 2015 I have NEVER heard of grinding a lifter. Maybe machining a lifter, but it has to be hardened and I have never heard of that either.Adjustable push rods are common. As are aftermarket rockers for some engines that will allow adjustment.Grinding a lifter, to shorten it is something that I've never heard of, but they can be resurfaced. The crank grinder, that I used to use, had a lifter grinding machine that would reface them with the proper crown. We used to have Austin Healey lifters reground since the only things that were available were cheezy Pacific Rim knockoffs that frequently disintegrated.Back on topic Link to comment Share on other sites More sharing options...
John348 Posted August 12, 2015 Share Posted August 12, 2015 Grinding a lifter, to shorten it is something that I've never heard of, but they can be resurfaced. The crank grinder, that I used to use, had a lifter grinding machine that would reface them with the proper crown. We used to have Austin Healey lifters reground since the only things that were available were cheezy Pacific Rim knockoffs that frequently disintegrated.Back on topic That makes perfect sense to correct a crowned lifter, not (as pointed out in an earlier post by another poster) to compensate a geometry change due to a milled head. Trying to compensate on the opposite side of the rocker are ratio I think could be tricky. Link to comment Share on other sites More sharing options...
countrytravler Posted August 15, 2015 Share Posted August 15, 2015 (edited) Also balance, blueprint and coat all moving parts.Will last forever. Here is a 35 Dodge flathead with all the work done except coating. Runs cool and quite. No vibrations.MicroBlue® The How It Works - MicroBlue Racing I have done this on my stock and race engines. Also Microblue all moving parts on my 10 car hauler. Went from 4.5 to 6.8 MPG. At 1 million miles on the units saved a lot in fuel, oil and breakdowns. Edited August 15, 2015 by countrytravler (see edit history) Link to comment Share on other sites More sharing options...
61-63 Posted August 24, 2015 Share Posted August 24, 2015 Posts #17 and #20 are good starts. Take lots of pictures as you tear down and as post #20 says mark stuff so you put the components back on in their correct locations and correct orientations. As you go there are no "stupid" questions so keep coming back here or to the Buick forums and ask before you leap if you are not sure. It would be good if you could find a mentor like the guys who put in posts #17 and 20. I don't know if anyone said it above but buy the factory chassis book for the year of car you are working as it will have all of the torque values for every component on/in the engine and pretty much the sequence of tearing it down and putting it back together; and ditto for just about everything everything on the car such as the transmission, rear end, starter, generator/alternator, etc. Buy a good torque wrench because it is critical to reassemble everything internal to the engine with correct torque. You will also need measuring tools such as dial calipers.I check everything the machine shop did when I get stuff back and you should also; machinists are human. Ditto the comment on Eastwood's products. Link to comment Share on other sites More sharing options...
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