97 Bonneville SSEi Engine rebuilt problem.
Thread Starter
Safety Car
Joined: Mar 2005
Posts: 4,255
Likes: 82
From: Brampton Ont.
97 Bonneville SSEi Engine rebuilt problem.
I never realised this section existed therefore this thread is coming from C3 Tech:
A friend of mine has rebuilt his 3.8 V6 Supercharged (Eaton M90) motor, and after the rebuilt, the motor is shaking at the back end by the trans. When he did the rebuilt he ended up putting a chip in one piston so that was changed and did work to the S/C like port & polish, coupler change, noise bearings and other minor stuff. The only real mod to the motor was a cam change, PCM and other electronics.
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The rebuilt took approximately 2 weeks from start to finish so I don't think the crank could have warped in that short of time and he did store it properly.
The new piston in his opinion was a good match up to the old one.
He used a torque wrench to reassemble the motor.
I don't think the work to the S/C would cause a vibration at the crank. Any suggestions would be appreciated since this vibration is serious enough that he believes he may have to pull the motor again. He's hoping for this to become a 13 second car. Keep in mind that he had moded this car previously.
Thanks
A friend of mine has rebuilt his 3.8 V6 Supercharged (Eaton M90) motor, and after the rebuilt, the motor is shaking at the back end by the trans. When he did the rebuilt he ended up putting a chip in one piston so that was changed and did work to the S/C like port & polish, coupler change, noise bearings and other minor stuff. The only real mod to the motor was a cam change, PCM and other electronics.
-
The rebuilt took approximately 2 weeks from start to finish so I don't think the crank could have warped in that short of time and he did store it properly.
The new piston in his opinion was a good match up to the old one.
He used a torque wrench to reassemble the motor.
I don't think the work to the S/C would cause a vibration at the crank. Any suggestions would be appreciated since this vibration is serious enough that he believes he may have to pull the motor again. He's hoping for this to become a 13 second car. Keep in mind that he had moded this car previously.
Thanks
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by Maymyvetteliveforevr
97 Bonneville SSEi Engine rebuilt problem.
I never realised this section existed therefore this thread is coming from C3 Tech:
Thanks
I never realised this section existed therefore this thread is coming from C3 Tech:
Thanks
Was the oddball piston weight matched to the rest of the balanced (?) set?
The last time I modified the factory huffer on my 3.8L Corvette...
RACE ON!!!
Thread Starter
Safety Car
Joined: Mar 2005
Posts: 4,255
Likes: 82
From: Brampton Ont.
Sorry, I should clarify, I meant this section as in the "Engine Mods' Section of the Corvette Forum. I do realise that this is not a Vette related topic, but I though I would try to obtain some valued infor since in my opinion, we have more experienced members here.
No the piston was not weighed, although a S2 L67 piston was purchased and that's the exact replacement. Also it was #1 piston that was replaced and the vibration is at the oposite end.
Thanks for the suggestion.
No the piston was not weighed, although a S2 L67 piston was purchased and that's the exact replacement. Also it was #1 piston that was replaced and the vibration is at the oposite end.
Thanks for the suggestion.
Burning Brakes
Joined: Nov 2001
Posts: 1,189
Likes: 2
From: Austin TX
The 3.8L Buick is externally balanced, and from what you described your friend either changed the flywheel/flexplate to something else, or didn't install it in the correct position on the crankshaft.
