vibration under heavy load left hand turning
04-21-2015, 11:48 AM
#1
Melting Slicks
Thread Starter
vibration under heavy load left hand turning
Last event at TWS I felt some slight vibration through the steering wheel under hard left hand cornering. It would only happen on certain corners, I thought it may be a tire rub, I have checked the tires and fenders and no indication of that. Any ideas. I also changed my endlinks many months back to the clunking noise, but this is a far different issue. Unsure if it is anything major, but I have found no evidence thus far.
04-22-2015, 06:45 AM
#2
Sounds like a left side shock absorber could need replacing and is allowing the wheel to hop a bit when the left side of the car is unloaded in a hard LH turn. Had this exact issue recently and used it as an excuse to upgrade to DRM Bilsteins. Problem solved. :-D
06-19-2015, 09:55 PM
#4
Melting Slicks
Thread Starter
ok guys when I typed this it was a typo its right hand turns. I have changed different sets of wheels, just finished changing the hub and the same vibration under hard right hand turns. I did notice I have rubbing on my steering rack from my header. Still unsure if thats the issue. Also I have pfadt shocks on the car with probably 6-8k miles.
06-20-2015, 06:40 PM
#5
Race Director
Member Since: Oct 2000
Location: Deal's Gap 2004 NCM Motorsports track supporter
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Might be a good time to upgrade the wheel bearings to SKF. Did you notice a longer brake pedal (pad kickback) after turning? When you replaced end links did you check for tight fit in the knuckle? Sometimes the hole gets worn and the joint does not fit tightly.
06-20-2015, 07:48 PM
#7
ok guys when I typed this it was a typo its right hand turns. I have changed different sets of wheels, just finished changing the hub and the same vibration under hard right hand turns. I did notice I have rubbing on my steering rack from my header. Still unsure if thats the issue. Also I have pfadt shocks on the car with probably 6-8k miles.
My header was rubbing on steering wheel shaft that goes down to the steering rack. Loosened the engine mounts and shifted the engine right, problem solved.
Your steering shaft probably has the paint rubbed off where it is contacting the header during right turns.
Last edited by CGZO6; 06-20-2015 at 07:54 PM.
06-20-2015, 08:39 PM
#9
Melting Slicks
Thread Starter
might try this, sounds like some work though
06-20-2015, 08:56 PM
#10
Loosen 2 big nuts on bottom of engine cradle. Use crowbar to slide engine to the right as far as needed. Tighten 2 big nuts.
Think the big nuts are 18mm, but it's been a few years.
Look at your steering shaft where it goes by the drivers side header. If your header is contacting the steering shaft, the shaft will have the paint rubbed off where the header is contacting the shaft during right turns.
Think the big nuts are 18mm, but it's been a few years.
Look at your steering shaft where it goes by the drivers side header. If your header is contacting the steering shaft, the shaft will have the paint rubbed off where the header is contacting the shaft during right turns.
06-20-2015, 09:49 PM
#11
Forgot to add: use jack to slightly lift engine off cradle when prying it to the right.
06-20-2015, 10:56 PM
#12
Melting Slicks
Thread Starter
Yes it is rubbing. I do know that. But if I turn the wheel on a big sweeper and hold the wheel (not turning the shaft at all) I still get a noise. I'm not eliminating this at all though and will try this
06-20-2015, 11:18 PM
#13
I had the exact same issue on my first track day after header install. Moving engine to the right solved my vibration issue when turning right. The engine leans left just enough for the header to contact the steering shaft when turning right (with the associated G load while turning) causing the vibration.
