Okay, about this LS1 "piston slap"...Update
Thread Starter
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
I didn't think to take a picture when I pulled the converter out. I have it back now, and took a few before it went back in.
One of the ring mount bolts that came loose (all three came loose):

If paint makes it work better, we should be in good shape:

Oh, the oil leak was the pan gasket, not the rear main seal. I had dropped the pan to replace the oil pump and generally clean things up, apparently I didn't clean the gasket surfaces well enough. There was some hardened crud between the oil pan gasket and rear cover. Weird, I was sure I had cleaned all of that stuff off. Oh, well, the "new" engine for sure is cleaned up - did it on the engine stand instead of swinging from the engine hoist, and replaced the pan gasket.
The engine and tranny are back under the car. Now to do a bunch of hooking things back up...
One of the ring mount bolts that came loose (all three came loose):

If paint makes it work better, we should be in good shape:

Oh, the oil leak was the pan gasket, not the rear main seal. I had dropped the pan to replace the oil pump and generally clean things up, apparently I didn't clean the gasket surfaces well enough. There was some hardened crud between the oil pan gasket and rear cover. Weird, I was sure I had cleaned all of that stuff off. Oh, well, the "new" engine for sure is cleaned up - did it on the engine stand instead of swinging from the engine hoist, and replaced the pan gasket.
The engine and tranny are back under the car. Now to do a bunch of hooking things back up...
Joined: Jun 2002
Posts: 13,576
Likes: 30
From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
Re: Okay, about this LS1 "piston slap"...Update
gonna be ready for the 2011 race season? how many cars are you running this year?
Joined: Nov 2006
Posts: 537
Likes: 4
From: Calgary, Alberta, Canada
Car: 89 WS6 TransAm
Engine: LQ408
Transmission: T56 Magnum
Axle/Gears: Strange S60, 4.10s
Re: Okay, about this LS1 "piston slap"...Update
The LS oil pan gasket, though rubber sealing, still requires a dab of silicone at each corner joint that the front / rear covers cause to seal properly.
Thread Starter
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
I did put the silicone on the corners where the block and back cover meet. It was leaking in the very middle of the back of the pan. When I pulled the cover off a couple of nights ago, there was a bunch of this hardened crud (like old gasket sealer, not silicone) between the gasket and rear cover. I was trashing pretty hard when I first put the engine together, working into the wee hours every night, trying to get it running before the race season was over, so I must have just missed properly cleaning that part. It was good & tight everywhere else.
Matt, points races start April 22. Should have this car running this week. I will be out of town next weekend, one test day on the 20th, so I should make it. After it is running, I'm going to tackle the torque arm replacement in the LS1/T56 car (going with a non-adjustable Jegster). The first stick shift race is May 14th.
Just running these two cars this year. Unless I keep breaking things - in that case, I might end up running the diesel pickup again...
Matt, points races start April 22. Should have this car running this week. I will be out of town next weekend, one test day on the 20th, so I should make it. After it is running, I'm going to tackle the torque arm replacement in the LS1/T56 car (going with a non-adjustable Jegster). The first stick shift race is May 14th.
Just running these two cars this year. Unless I keep breaking things - in that case, I might end up running the diesel pickup again...
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