Vibration at high rpms

johnwb · 05-13-2009, 09:21 PM

Cant seem to pin pont this one,88 5.0l 5 speed,It vibrates like the engine is out of ballance at 3,500 rpm and up ,it will shake the shifter,you can fell it through the whole car too., doesnt matter if your driving ,clutch in or out,neutral or in gear,or just holding it steady.I dont think the ballancer moved any,It was painted and no sign of broken paint,and the timing is still acurate,I already took the flywheel out and had it surfaced as well,I also bought new engine mounts,My next two guesses are bent crank or the pressure plate is bent,Any ideas would be much appericated thank you.

johnwb · 06-29-2009, 03:36 PM

I did find my vibration,The crank bent,anyway I have a new block now and I am on my way to buliding a 347,I already have the eagle products,I need to have the block bored and what not, but I cant wait to get this together.

05-13-2009, 09:21 PM	#1
johnwb 88lx work in progress Join Date: Jul 2005 Location: canada Posts: 62	Vibration at high rpms Cant seem to pin pont this one,88 5.0l 5 speed,It vibrates like the engine is out of ballance at 3,500 rpm and up ,it will shake the shifter,you can fell it through the whole car too., doesnt matter if your driving ,clutch in or out,neutral or in gear,or just holding it steady.I dont think the ballancer moved any,It was painted and no sign of broken paint,and the timing is still acurate,I already took the flywheel out and had it surfaced as well,I also bought new engine mounts,My next two guesses are bent crank or the pressure plate is bent,Any ideas would be much appericated thank you. __________________ 88lx,4cly body,90 5.0l,e cam,summit headers,holley 650 double,edelbrock performer rpm intake,crane valve springs,e7tes lots of machining,5 speed,3.73s,exhaust flotech,with 2.5"exhaust

06-29-2009, 03:36 PM	#2
johnwb 88lx work in progress Join Date: Jul 2005 Location: canada Posts: 62	Re: Vibration at high rpms I did find my vibration,The crank bent,anyway I have a new block now and I am on my way to buliding a 347,I already have the eagle products,I need to have the block bored and what not, but I cant wait to get this together. __________________ 88lx,4cly body,90 5.0l,e cam,summit headers,holley 650 double,edelbrock performer rpm intake,crane valve springs,e7tes lots of machining,5 speed,3.73s,exhaust flotech,with 2.5"exhaust

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