Garys1969RR
Well-Known Member
Just got thus 496 apart, and the walls look pretty shiny to me. Motor was losing a lot of compression past the rings. Can you tell from pics if this was the Prob?
Wasn't burning any oil, but we could see oil seeping out of the front seal/cover gasket after each run. After we increased crankcase venting, that seepage decreased. Still a little bit, though.Some ring flutter... and what appears(hard to see for sure from Pics), to be some Oil Ring Shadowing which may have exacerbated the flutter ?
Did this thing huff any Oil ?
Not sure on the machine shop. We bought the car complete, 2 years ago, from a lady whose husband had died. 440 source 496 stroker kit, 383 block, Stealth heads, roller cam and rockers. We put 25 or 30 runs on it, and realized it had alot of blowby. Ran good, sounded good. Looks to be very little wear on any of the parts, other than the cyl walls and some bearing wear.Was this engine block fully tested and machined by a race engine shop with a clearance sheet? Who's rotating assy, and was it fully measured also. How many runs has been put on it?
Well at this point we are going to use a 400 block, build a 512. Will just need new pistons. All the other parts can be used in the 512. Will use the rings 440 Source sells. Total seals. Moly ring I think.If all eight holes still measure up, I'd consider 5-6 strokes with a ball hone, and see what those vertical lines look like. Can they be felt with a fingernail? What type rings are you planning to use?
OK, I didn't assemble this motor. Never had a problem getting the rings to seal on any motor I've ever built. This motor was running way rich with the 1050 Dominator carb when I got it. We leaned it out, and it was still on the rich side. LOL. That may have contributed to the original owners failure to get the rings to seal properly. You could rotate the motor, and hear all the compression leak past the rings within 1 second. My RV motor takes 4 to 5 seconds to leak down when you bump it over.Make sure wall are prepped correctly for the rings then
Scrub the walls with soap and water until the soap stays white all grit removed
blow dry and oil so no rust