timingbelt wobble

superwhite · 02-05-2011, 06:40 PM

I started my engine (7mgte) after the timing belt install without the top cover on just to make sure everything is ok. It has a slight "wobble" front to back in what seems to be one spot on the belt (hard to tell when runing). I cant see any pulleys wobbling exept the oil pump pully and it looks like the face may not be true and the "movement" is much more frequent or rapid than the belt movement and the crank pully is new. When I pulled the old belt I noticed what appeared to be tiny bits or rubber residue inside the timing cover but the belt looked ok. Is this movement anything to worry about?

cre · 02-07-2011, 07:13 AM

That is a BIG problem. Start with pulling out the idler pulley and test it for any axial or radial play... if there is ANY play in ANY direction, you need to replace it. The idler is something which should be replaced with the belt. You also need to pull the oil pump drive pulley, if you think it may be moving, and take it (and might as well take the cam pulleys) to a machine shop and inspected to see if it is true or not.

97SupraTT · 02-07-2011, 11:21 AM

This is a serious issue. But i would make sure that the belt isnt just a little off-set on the cam pulley.

02-05-2011, 06:40 PM	#1
superwhite Stock Join Date: Nov 2010 Location: LaPorte Posts: 12	timingbelt wobble I started my engine (7mgte) after the timing belt install without the top cover on just to make sure everything is ok. It has a slight "wobble" front to back in what seems to be one spot on the belt (hard to tell when runing). I cant see any pulleys wobbling exept the oil pump pully and it looks like the face may not be true and the "movement" is much more frequent or rapid than the belt movement and the crank pully is new. When I pulled the old belt I noticed what appeared to be tiny bits or rubber residue inside the timing cover but the belt looked ok. Is this movement anything to worry about? Last edited by superwhite; 02-05-2011 at 08:26 PM.

02-07-2011, 07:13 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	That is a BIG problem. Start with pulling out the idler pulley and test it for any axial or radial play... if there is ANY play in ANY direction, you need to replace it. The idler is something which should be replaced with the belt. You also need to pull the oil pump drive pulley, if you think it may be moving, and take it (and might as well take the cam pulleys) to a machine shop and inspected to see if it is true or not. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

02-07-2011, 11:21 AM	#3
97SupraTT 3" Exhaust Join Date: Jun 2009 Location: Guam Posts: 56	This is a serious issue. But i would make sure that the belt isnt just a little off-set on the cam pulley.