Blown&Injected
Active Member
- Joined
- May 31, 2001
I thought it was just my down pipe rattlin' against something until the frequnecy of the rattle developed a pattern that exactly matched the engine RPM's.
Sounded like (although not found in our cars) a mechanical (not electric) fan blade smacking on the fan shroud - perhaps a bit metallic knock like.
I was able to get under the car -engine on- and it almost sounded like there was a knock in the bottom end on the engine.
On the highway during lock-up the sound is not noticable. If I tap the brakes the sound returns breifly and goes away again with lock-up.
From a stand still, the knock is BAD and then fades as the RPM's come up.
Any way to tell for sure?
TIA,
Steve
Sounded like (although not found in our cars) a mechanical (not electric) fan blade smacking on the fan shroud - perhaps a bit metallic knock like.
I was able to get under the car -engine on- and it almost sounded like there was a knock in the bottom end on the engine.
On the highway during lock-up the sound is not noticable. If I tap the brakes the sound returns breifly and goes away again with lock-up.
From a stand still, the knock is BAD and then fades as the RPM's come up.
Any way to tell for sure?
TIA,
Steve
What I would do, to further verify your suspicions, is remove the three converter-to-flexplate bolts. Push the converter back into the trans., away from the flexplate, until it bottoms out. 
