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All done! for now ... 2 Saabers Like This Post! Posted by bobc [Email] (#473) [Profile/Gallery] (more from bobc) on Sun, 23 Aug 2020 09:02:12 In Reply to: balance chain and main bearings: check my work, bobc [Profile/Gallery] , Fri, 21 Aug 2020 10:45:17 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Buttoned her up (again) and we are happy for now. The nasty bottom end thump from the main bearing is gone. The rattly raspy sound is gone. all that remains is what I presume is piston slap.
what we did:
- cut the balance chain, and there is no noticeable vibration in the engine. it seems a bit more lively in fact.
- replaced all of the main bearings, They were beat up, but none had spun. We had a hell of a time replacing #1 main bearing but eventually prevailed.
Stethoscope reveals that the engine is mostly quiet everywhere except around the #4 exhaust manifold bolt. there is light tinny sound that is in time with crank rotation. I am assuming this is "piston slap", which I failed to diagnose earlier! (Jimmy, you were right on!)
Mostly a success so far, there was quite a cacophony of noises in this car. I think we will do the pistons (or at least #4) as a winter project.
#3 min bearings and scratched up thrust washer:
_______________________________________ '08 9⁵ 2.3T SportCombi, Polar White '01 9⁵ Aero Midnight Blue (benched) '00 9⁵ Aero Midnight Blue (rescued) '99 9⁵ Base model, Cosmic blue '00 9⁵ Aero Silver (RIP - transmission )
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