Selim Posted January 9, 2019 Share Posted January 9, 2019 Rebuilding motor for my Buick 1949 need to know standard size of pistons to buy new ones also any clue where I could buy them from? pics of engine attached Link to comment Share on other sites More sharing options...
Selim Posted January 9, 2019 Author Share Posted January 9, 2019 ebuilding motor for my Buick 1949 need to know standard size of pistons to buy new ones also any clue where I could buy them from? pics of engine attached Link to comment Share on other sites More sharing options...
Selim Posted January 9, 2019 Author Share Posted January 9, 2019 ebuilding motor for my Buick 1949 need to know standard size of pistons to buy new ones also any clue where I could buy them from? pics of engine attached Link to comment Share on other sites More sharing options...
Leif Holmberg Posted January 9, 2019 Share Posted January 9, 2019 (edited) There are 2 size of engines 248cu in,and 320 cu in.Try this if your engine is a 248 cu in..https://www.kanter.com/content/Buick/kanter_Buick_1949_Engine_Parts_5793.html Leif in Sweden. Edited January 9, 2019 by Leif Holmberg (see edit history) Link to comment Share on other sites More sharing options...
Dave Henderson Posted January 9, 2019 Share Posted January 9, 2019 Standard bore for the '49 Super is 3 3/32 as per Motor's Auto Repair Manual.. Egge Machine Company is the leading supplier for antique vehicle pistons. Link to comment Share on other sites More sharing options...
Leif Holmberg Posted January 9, 2019 Share Posted January 9, 2019 Why are you changing the pistons,broken or what???????? They looks really good in the picture. Leif in Sweden. 2 Link to comment Share on other sites More sharing options...
Selim Posted January 9, 2019 Author Share Posted January 9, 2019 :indeed the seem to b ok (pistons) with slight friction the car over heated and affected one of the pistons So I was looking to buy Pistons a bit more than standard (7,85cm) then we take standard rings If u don’t have a bigger size piston then I d go for standard pistons but then I ll have the rings .020 Connecting Rod Bearings - .020 Main Bearings - , .020, Also full set of gaskets These items in order to overhaul the engine is that correct? Excuse my I ignorance but it’s my first time Link to comment Share on other sites More sharing options...
Dave Henderson Posted January 9, 2019 Share Posted January 9, 2019 (edited) With the crankshaft journals being .020, it would seem likely the cylinders were perhaps bored oversize at the same time, so look for an indication that that may have been done. Scrape the carbon off the top of the pistons and look for an oversize marking. Would be best to have someone mike the bores. If they are in fact standard you should measure the cylinder's taper to see if it will take just a ring job. . Ring size needs to match the piston size . Edited January 9, 2019 by Dave Henderson (see edit history) 2 Link to comment Share on other sites More sharing options...
Ben Bruce aka First Born Posted January 9, 2019 Share Posted January 9, 2019 Selim, could you please post another picture of the driver side of the engine, below the manifold? Thanks Ben Link to comment Share on other sites More sharing options...
PFitz Posted January 9, 2019 Share Posted January 9, 2019 The answer to your piston size is in the bores. Even if the bores are good, as Dave mentioned above, they may not be standard. The pistons need to be sized to whatever the "actual" bore size is, plus whatever the clearance is. If you order pistons that's one of the main questions a good piston manufacture will ask you. You also need to know that bore size to order ring sets. If the bores are worn oval and tapered, new pistons likely won't help you, just waste your money. If you have wear that is machined and honed out that's the bore size you give to the piston maker and how much piston-to-bore clearance your engine needs. Find the bore, then find the pistons that work properly with it. Paul 1 Link to comment Share on other sites More sharing options...
Selim Posted January 9, 2019 Author Share Posted January 9, 2019 30 minutes ago, Ben Bruce aka First Born said: Selim, could you please post another picture of the driver side of the engine, below the manifold? Thanks Ben Link to comment Share on other sites More sharing options...
Selim Posted January 9, 2019 Author Share Posted January 9, 2019 Link to comment Share on other sites More sharing options...
Selim Posted January 9, 2019 Author Share Posted January 9, 2019 27 minutes ago, PFitz said: The answer to your piston size is in the bores. Even if the bores are good, as Dave mentioned above, they may not be standard. The pistons need to be sized to whatever the "actual" bore size is, plus whatever the clearance is. If you order pistons that's one of the main questions a good piston manufacture will ask you. You also need to know that bore size to order ring sets. If the bores are worn oval and tapered, new pistons likely won't help you, just waste your money. If you have wear that is machined and honed out that's the bore size you give to the piston maker and how much piston-to-bore clearance your engine needs. Find the bore, then find the pistons that work properly with it. Paul Everything is standard , pistons, bore .. yet there is some wear in one of pistons but not a big deal. Problem is there is no spare parts at all where I m staying so they will manufacture the rings, bearings and will scrap a layer from bore in order to clear it, that would lead to a gap between pistons and bore, so they will fill that gap with manufactured steel layer like a wall between the 2 in order to not leave any gaps , and using the same original pistons of the engine now I don’t know whether I should follow that plan or resort to first solution of buying Complete overhaul kit with bigger size pistons as explained earlier ? Link to comment Share on other sites More sharing options...
Ben Bruce aka First Born Posted January 9, 2019 Share Posted January 9, 2019 Thanks for the pictures. They confirm a 248 CI engine. And POWER STEERING. Where are you? Ben Link to comment Share on other sites More sharing options...
Guest Posted January 9, 2019 Share Posted January 9, 2019 Since your original problem was overheating NOW is the time to knock out all the core plugs and clean out the water passages. I personally would use all new pistons, pins and rings after the block was bored/honed to a specific oversize. Make sure to have the rods aligned, new bearings would not hurt either. Link to comment Share on other sites More sharing options...
kgreen Posted January 10, 2019 Share Posted January 10, 2019 Since you mention that you are new to this, here is a website for beginners that gives you a good general idea for engine rebuilding. Yes, the engine features is different so just focus on the concepts. The straight 8 has peculiarities and that is where this board will be most helpful. One of the processes you describe is called re-sleeving which is what you do if the cylinder(s) are in very bad shape or are at the end of their overboard possibility. Here in Atlanta that costs about $150 per cylinder (where are you?) A new piston would be less than that. The decision can't be made until you measure to determine the bore is worn with a taper or out of round. Remember: bag-n-tag, measure everything then decide your coarse of action. Link to comment Share on other sites More sharing options...
edinmass Posted January 10, 2019 Share Posted January 10, 2019 On 1/9/2019 at 5:59 AM, Dave Henderson said: Standard bore for the '49 Super is 3 3/32 as per Motor's Auto Repair Manual.. Egge Machine Company is the leading supplier for antique vehicle pistons. I do NOT agree...........and most people here would also......also, it has been reported they no longer make pistons, they resell from other suppliers........not sure about how correct that is. I like many others have had very poor service and poor quality parts from the above company, I would use anyone else......... 1 Link to comment Share on other sites More sharing options...
PFitz Posted January 10, 2019 Share Posted January 10, 2019 (edited) 29 minutes ago, edinmass said: I do NOT agree...........and most people here would also......also, it has been reported they no longer make pistons, they resell from other suppliers........not sure about how correct that is. I like many others have had very poor service and poor quality parts from the above company, I would use anyone else......... Add me to that list, also. Switched to only using Ross forged pistons years ago. Stronger, lighter, quieter, and far better quality control. Paul Edited January 10, 2019 by PFitz (see edit history) Link to comment Share on other sites More sharing options...
Restorer32 Posted January 10, 2019 Share Posted January 10, 2019 Regardless who you use for cast pistons the ultimate source is likely the same. We needed pistons for a '27 Kissel. Egge could not supply them, saying they had had a fire and their pattern for our particular size piston was destroyed. We then called one of the other suppliers of pistons and got the same story. They had had a fire. Called yet a third supplier and you guessed it, they had a fire. We finally had to buy a very expensive set of forged pistons, way overkill for the low compression Kissel engine. Link to comment Share on other sites More sharing options...
Selim Posted February 16, 2019 Author Share Posted February 16, 2019 Need to know arrangement of plugs wires to distributer in my 8 cylinder straight 8 original engine of my Buick super 1949. I did engine overhaul and mechanic is confused about routes for each plug wire of 8 plugs from left to right . Which one is where? First one to left or right ? Link to comment Share on other sites More sharing options...
Marty Roth Posted February 17, 2019 Share Posted February 17, 2019 Front of car and front of engine is #1, and each one rearward is #2, #3, etc Looking at right side of engine, #1 is at far right - #8 is at far left hope this helps, of course youe mechanic should look at a MOTORS MANUAL, or a CHILTONS, or a BUICK SHOP MANUAL Link to comment Share on other sites More sharing options...
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