s40 timing adjustment

libo · Post by **libo** » 30 Sep 2009, 18:40

How do you adjust the engine timing on a 2001 S40?

Post by **JDS60R** » 30 Sep 2009, 21:49

The cam timing and ignition timing are preset. Some of the cam gears have minor adjustment to them.

Which timing procedure are you looking for? cams? Ignition?

libo · Post by **libo** » 01 Oct 2009, 14:42

Was looking to adjust the ignition timing like I have done in the past on my american cars.
This is my 1st Volvo, didn't realize it was not adjustable. With 157,000 miles it was starting to tap, thought a timing adjustment might stop that. Guess I am looking at a valve job. Or do you have any other ideas?

my ovlov · Post by **my ovlov** » 17 Oct 2009, 02:00

The timing on most new cars (including many American cars) is controlled by the cars computer.

Check and make sure your exhaust manifold bolts are tight, I have seen some come a little loose causing a valve tap like noise.

Are you using quality oil and changing your oil on time? Try an oil change with Mobile 1 Synthetic and half a can of Seafoam for 3000 miles to clean up the engines internals.

I also recommend running Seafoam through the intake to clean up the valves. (Disconnect a vacuum line AFTER the throttle body(I use the brake booster line) and suck up 1/4 to half a can at 2-3k rpms until the engines stalls, if the engine does not stall turn it off immediatly and let it sit for 5 minutes. Start the car up and enjoy the smoke show. Rev it up and take it on the highway and drive the piss out of it.)

O-rings for the oil pump are also a problem on cars that are not maintained well, the o-rings deteriorate and the oil pressure doesn't rise fast enough or keep high enough at idle thus engine tick is heard.

Do a compression test before getting a valve job. No point in wasting the money if its just a sound thats not hurting anything.