strange vibrations
05-11-2008, 08:55 AM
#1
Racer
Thread Starter
strange vibrations
Hi all,
My GTS had a vibration in the engine area between idle and about 1500 rpm. You feel it even in the gas pedal. First I thought it was motor mount related but after swapping the mounts it did not change much. I listened to bearings but no clear source. No idea where it came from.
Came from... cause I finally found it. Yesterday the engine was squeeking a bit. Did not even sound like a belt or so. Close inspection did not reveal the source. It sounded as if it came from the front of the engine. Then I noticed the pulley had one bolt missing. The pulley was actually loose a bit and therefore out of balance.
I took the pulley off, noticed one bolt had snapped and the remaining part of the bolt was still in. It took an hour and a half to get the broken bolt out. The grip vise finally did it. Luckily the bolt was slowly moving out. The pulley is now on again, 3 new bolts and it runs nicely balanced.
The vibrations have miraculously disappeared....
My GTS had a vibration in the engine area between idle and about 1500 rpm. You feel it even in the gas pedal. First I thought it was motor mount related but after swapping the mounts it did not change much. I listened to bearings but no clear source. No idea where it came from.
Came from... cause I finally found it. Yesterday the engine was squeeking a bit. Did not even sound like a belt or so. Close inspection did not reveal the source. It sounded as if it came from the front of the engine. Then I noticed the pulley had one bolt missing. The pulley was actually loose a bit and therefore out of balance.
I took the pulley off, noticed one bolt had snapped and the remaining part of the bolt was still in. It took an hour and a half to get the broken bolt out. The grip vise finally did it. Luckily the bolt was slowly moving out. The pulley is now on again, 3 new bolts and it runs nicely balanced.
The vibrations have miraculously disappeared....
05-11-2008, 10:27 AM
#2
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Hi Theo,
Which pulley?
Roger
Which pulley?
Roger
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
