1995 GMC Jimmy carbon build up

Tiny
2CARPROS-ARCHIVES
  • MEMBER
  • 1995 GMC JIMMY
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 126,000 MILES
1995 GMC Jimmy 4WD mileage: 126,000. My truck has been experiencing problems caused by carbon deposits in the EGR Valve. We have replaced the valve and cleaned out the valve many times, including, most recently, three days ago. However, the truck stalled again and when we checked the EGR valve, more carbon deposits had built up and had to be removed. I understand that the GM Vortec engine has a history of carbon build up problems. Is there anywhere else we should check for carbon buildup that's already in the system, or anything we can do to prevent the carbon buildup from occurring so frequently? Thank you.

Do you
have the same problem?
Yes
No
Monday, January 10th, 2011 AT 11:17 PM

1 Reply

Tiny
2CARPROS-ARCHIVES
  • MEMBER
The carbon buildup in the EGR passages is the result of excessive oil coming down the valve stems. We've found similar problems with other cars usually at 60,000 or more miles. Replacing valve stem seals reduces oil use. The stems are made out of rubber and over time become hard and brittle and will no longer seal.
Was this
answer
helpful?
Yes
No
Monday, January 10th, 2011 AT 11:33 PM

Please login or register to post a reply.

Sponsored links