RIVNIK Posted May 25, 2014 Share Posted May 25, 2014 Is "mowing the lawn" some mechanical euphemism I haven't heard yet? For de-burring the castings, maybe? Its a new one on me. Oh well, you learn something every day! Link to comment Share on other sites More sharing options...
Bill Stoneberg Posted May 26, 2014 Author Share Posted May 26, 2014 Now, mowing the lawn it just what it sounds like, following a mower while taking a walk.Yesterday, we put the pistons in. Sounds easy, well 7 went in with no issues. # 8 that was a different story.Tried that one numerous times with a couple of different ring compressors. It kept getting hung on the oil scraper. Just wouldn't go int the hole correctly.After some studying, it seems that the hole was the only one that was not chamfered. A file and a grinding wheel (not running just scraped) fixed that issue.It still took two of us to get that last one on, one holding the ring compressor tight to the block while the other hit the piston gently.Anyway it took two hours to get the last piston in. Link to comment Share on other sites More sharing options...
Bill Stoneberg Posted May 26, 2014 Author Share Posted May 26, 2014 Cam and timing gears / chain are now in.. Family time for the rest of the day. Link to comment Share on other sites More sharing options...
arnulfo de l.a. Posted December 25, 2014 Share Posted December 25, 2014 could a timing chain failure been the cause of the valve tearing up that piston? What would cause a valve to just let go?Adnulfo, The valve stem broke in half right above the valve, dropping it into the combustion chamber. There it acted like a large ball bearing in a dishwasher full of glass. It broke at least 3 pistons and I dont trust any of the rest and it broke the bottom of some cylinders. I still had compression and I am hoping I dont have to have them sleeved. Will know more after I take it to the machine shop.John, I will keep you in mind for the pistons as I dont know what I will need yet. I would perfer not to go oversized if I can avoid it.Good news is that the crank looked good, no scoring or scratches on the rod bearing surfaces. Going to pull the mains tonoght and look at them. Oil pump screen was full of metal particles though. I pulled a baggie of metal out of the bottom of the engine.Brought this up again because i read in a motorcycle forum that some valves are two piece valves . That is they start off as two pieces and are welded / machined into one. They are notorius for breaking the way bills did on harley evo motors. Could it be that nailhead factory valves are two piece? Thats a scary thought! First time i ever heard of two piece valves. Seems like a bad design . What say you men? Link to comment Share on other sites More sharing options...
60FlatTop Posted December 26, 2014 Share Posted December 26, 2014 It still took two of us to get that last one on, one holding the ring compressor tight to the block while the other hit the piston gently.Anyway it took two hours to get the last piston in.That story told by a Chief Financial Officer makes me think of how hard it is for my wife to make a simple Quickbooks entry sometimes She keeps the books for my work.Bernie Link to comment Share on other sites More sharing options...
Seafoam65 Posted December 30, 2014 Share Posted December 30, 2014 Cam and timing gears / chain are now in.. Family time for the rest of the day. Bill, no posts since May....did you get the car running again? Link to comment Share on other sites More sharing options...
Bill Stoneberg Posted January 2, 2015 Author Share Posted January 2, 2015 Nope, The engine is in the car, most everything is re attached and I was hoping for some time this Christmas to work on it.BUT, as usual, life got in the way. Cold weather (for us) and a pulled muscle has made it so I couldn't stand in the garage for any period of time.It is supposed to be warmer this weekend and if it is, I plan on working on the car. I want to get it up and running again. Link to comment Share on other sites More sharing options...
Bill Stoneberg Posted November 10, 2015 Author Share Posted November 10, 2015 Its been 11 months or so and I blew up the engine I put in above. Didn't even make it through cam break in before starting to knock. Pulled it apart and the bearings were trashed and the bores scored. Rebuilt another engine and it is back in the car and about to start. Need better luck with this one... 1 Link to comment Share on other sites More sharing options...
slosteve Posted November 11, 2015 Share Posted November 11, 2015 WOW, what a disappointment. Sorry for your loss. Steve Link to comment Share on other sites More sharing options...
alini Posted November 11, 2015 Share Posted November 11, 2015 Any idea what lead to the immediate failure of the bearings? Link to comment Share on other sites More sharing options...
Bill Stoneberg Posted November 11, 2015 Author Share Posted November 11, 2015 Any idea what lead to the immediate failure of the bearings?I imagine it was crap (technical term) left in the engine when it was rebuilt. Dirt or dust left in the oil passages did me in. The oil came out silver / grey when I drained it. Had it checked by another machine shop and he wondered who fouled the engine up. Link to comment Share on other sites More sharing options...
alini Posted November 11, 2015 Share Posted November 11, 2015 I had my block hot tanked, and the guys who did it didnt clean out the gunk from the lifter galleys. Had I not caught I would have ended up like you. Hoping I didnt miss anything else, we're about a month out of cranking it up. Link to comment Share on other sites More sharing options...
slosteve Posted November 11, 2015 Share Posted November 11, 2015 I once had a shop do the top end on a Harley and it ran so hot that it turned the exhaust RED hot (timing & mixture were good). Upon tear down found gritty whitish/silver crap in everything; looked to be valve lapping compound (!?). Steve Link to comment Share on other sites More sharing options...
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