SPONSORED LINKS

1995 Volvo 850 850 Turbo Engine Knocking

Tiny
BWATSON3
  • MEMBER
  • 1995 VOLVO 850
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 140,000 MILES
I have a 95 850 Turbo - the check engine lights came on and the codes indicated that the O2 sensors and the knock sensor needed replacement -- I have not replaced either -- my son is driving home and a loud noise starts from engine -- the car will start but has this loud noise -- I took the coil wire off and turn over the engine and all seems fine -- no noise -- he said that the car was starting slower than before -- i'm wondering whether my time belt has slipped or that the knock sensor going out is causing the loud noise -- took the middle 2 plugs out and both seem fine -- oil is full -- no water in oil -- other? When a turbo goes out, does it make any noises?

Thanks for your help
SPONSORED LINKS
Tuesday, March 3rd, 2009 AT 3:07 PM

1 Reply

Tiny
JAMES W.
  • MECHANIC
  • 2,394 POSTS
Timing belts rarely slip or jump. They usually just shred. The most common indications of turbo failure are gross smoking out the exhaust pipe, poor engine excelleration or the turbo coming apart and throwing debris into the exhaust system or the engine itself. With the engine at an idle and trans in park, raise the engine off idle a couple of hundred rpms. If the "rattle" follows the engine rpms, this may bad rod bearings in the engine. Good luck.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, March 3rd, 2009 AT 5:49 PM

Please login or register to post a reply.

Related Engine Knock Content

Engine Knock - Ping
GUIDE
Engine Knock - Ping
An automotive engine knock, and engine "ping" are two different things so it can be a bit confusing, here is an explanation to help avoid confusion when reading ...
VIEW MORE

Sponsored links