Volvo AWD 850 Forum

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front 850 camshaft seals 850

posted by someone claiming to be mark on Wed Jan 7 16:09 CST 2009 [RELATED]

I need to replace the oil seal on my 850 non-turbo, which has almost 300K on it. After removing timing belt, can I just mark and unbolt camshaft sprocket, replace seal, and reinstall sprocket in same position? Haynes manual indicates a complex procedure to lock both camshafts at the rear end, which looks like a PITA. I have the ipd camshaft locking tool and have successfully changed the timing belt (once) - is this seal change too difficult to screw around with?

thx
mark

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front 850 camshaft seals 850

posted by someone claiming to be ksg on Thu Jan 8 06:50 CST 2009 [RELATED]

I think the reason for the holding tool is that the valve springs may make one or the other camshaft rotate some when freed of the belt. The holding tool should make it easier to guarantee you have a correct reference for the angular positions of both camshafts when you reinstall the sprockets (positioning them by using the timing marks). It is not clear to me that you could guarantee to mark the position of a sprocket with respect to its camshaft within less than one tooth accuracy.

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front 850 camshaft seals 850

posted by someone claiming to be gwen on Thu Jan 8 01:39 CST 2009 [RELATED]

I vote to take the car to the dealer and let them deal with it. Couple hundred dollars for the repair comes with a nice insurance policy and you won't get sweaty hands when you get in the car and have to dare yourself to turn the ingnition on......

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front 850 camshaft seals 850

posted by someone claiming to be mark on Thu Jan 8 01:48 CST 2009 [RELATED]

Ha! When I last changed the timing belt I really did not know what to expect when I turned the key...the camshafts had turned a bit, and I spent an hour getting them lined up. Car ran fine and no problems wit belt after more than a year...just wished I did the seals back then.
mark

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front 850 camshaft seals 850

posted by someone claiming to be gwen on Thu Jan 8 03:42 CST 2009 [RELATED]

Jobs like this are alot easier when it's sunny and 80 degrees outside and you don't need the car for a couple days..........I just wonder...if you took the sprocket off and the cam moved say 1/4" how do you line back up? Seems like Haynes goes through alot of trouble to make sure the cams don't move....probably for a reason.

Let us know how it turned out.....

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front 850 camshaft seals 850

posted by someone claiming to be mark on Thu Jan 8 04:38 CST 2009 [RELATED]

well, I would mark the sprocket to the camshaft, in the center of the sprocket which touches the cam...so if the cam moved a bit, when I reinstall the sprocket I can align the mark made on the camshaft, and use the sprocket markings to the housing to make sure it is correct.

Hows that for some fancy do-it-yourself logic?

BTW, it is about 20degrees here in nyc and the wind is blowing 30mph....but, the damn thing is leaking like crazy.

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posted by KlausC on Thu Jan 8 15:18 CST 2009
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last visit: Fri Oct 24 10:15 CST 2014

[RELATED]

The problem is the holes in the sprocket, they are oblong so that the sprocket can be aligned with the timing marks. If you scribe around the 3 bolts, you should be able to get the bolts back into the same spot. Also use white out in the center of the sprocket where it touches the cam.

+20F?? Heat wave!!

I am taking my daughter to Chelsea next week, watch the temp drop while I am there. She is interning at an art gallery and with an artist for a semester, in the BIG apple - no cars needed.

Klaus
--
Volvoless. Sold the R. There is now a void...

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posted by KlausC on Wed Jan 7 17:15 CST 2009
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last visit: Fri Oct 24 10:15 CST 2014

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Congratulations on your 5th timing belt change! The IPD locking tool is probably not strong enough to hold the sprocket while you try to get the bolt off.
I haven't done this, but... What if you first loosen the sprocket bolt by a 1/2 turn with the belt still on. Use your hand to hold the belt tight. Then remove the belt without changing the position of the cams. Definitly mark the cams to make it easier to see.
When you pull the pully off, make sure you do not rotate the cam. R&R the gasket and finger tighten the sprocket. Put the IPD lock in place and put the new belt back on, then torque the sprockets back into place.

I hope this makes sense. I read the Haynes manual and it seems like a lot of unnecessary work. I don't think you will inadvertly turn the cams 180 degrees without the sprocket on. Be careful prying out the old seals and coat the new seals with oil - don't put them in backwards!!

Klaus

--
Volvoless. Sold the R. There is now a void...

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