sanyom9990 Posted January 12, 2014 Report Posted January 12, 2014 (edited) [video=facebook;10151897915441173]https://www.facebook.com/photo.php?v=10151897915441173&l=1148040197380487677 link:https://www.facebook.com/photo.php?v=10151897915441173&l=1148040197380487677 3100 sfi L82 194k making strange noises while warm or cranking Edited January 12, 2014 by sanyom9990 no video Quote
1988PhantomFE3 Posted January 13, 2014 Report Posted January 13, 2014 (edited) That noise sounds weird. Edited January 13, 2014 by 1988PhantomFE3 Quote
Pitts Posted January 16, 2014 Report Posted January 16, 2014 Doesn't sound good. I couldn't hear it the best (even with the volume cranked up). But instead of trying to find out what it is, let's start with what it isn't. We can pretty much assume fuel and air are not the culprits. It's not a constant and steady noise which means we can eliminate most of the valve train. It sounds like metal grinding. What side of the engine is it loudest or happening on? Quote
sanyom9990 Posted January 21, 2014 Author Report Posted January 21, 2014 well it turned out to be the torque converter vibrating against the flex plate. one of the screws had started backing out. thanks for the reply though! Quote
Pitts Posted January 21, 2014 Report Posted January 21, 2014 Huh. That's an odd sound for what the problem was. Did you use blue locktite? If you have a torque wrench, do about 40 ft lbs. All data says 44 ft lbs, but based on bolt size, 40 is right on the edge of pushing it and being safe. Quote
rich_e777 Posted January 21, 2014 Report Posted January 21, 2014 In the dealer manual it states that the flex plate to torque converter should be at 46lbs. All bolts should be as close to this number as possible to achieve a good balance. It could be the loose bolt threw the converter off balance. Quote
2001goldGTP Posted January 21, 2014 Report Posted January 21, 2014 that happened to my car, i thought the motor was toast. the dipshyt at the transmission shop did not use lock tight on the bolts when he installed them. two came out and the third got bent in there odd. we had to very carefully re tap the threads. got OEM GM hardware, lock tight and installed them. haven't had an issue in a year. The thing you really need to do is make sure you find all three of the old bolts. I found one loose and one still doing its job. the third cost me a starter a couple days later, i had assumed it fell out. it hadn't Quote
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