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Engine timeing

Help, Advice, Owners' Discussion and DIY Tutorials on all Volvo's "mid era" rear wheel drive Volvos.

1975 - 1993 240
1983 - 1992 740
1982 - 1991 760
1986 - 1991 780
1990 - 1998 940
1990 - 1998 960
1997 - 1998 V90/S90

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A.Baker
Posts: 37
Joined: 20 January 2004
Year and Model:
Location: California

Engine timeing

Post by A.Baker »

After the ECM repairs the car ran great for a few days. Then the rear main seal let go. After replaceing it the engine would not start at all. Then it hit me, this is an electronic engine. I did not time the fly wheel w/engine sensor. after pulling the trans and inspecting the flywheel there are no timing marks execpt for the larger spacer on the tone wheel attached to the flywheel. I tryed it in advanced and retard, Those are the only bolt patterns available useing the engine position sensor and tone ring spacer as a refrance. So where does the spacer go when #1 is @ tdc ?

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jonesg
Posts: 3512
Joined: 16 January 2008
Year and Model: 2004 V70
Location: Northern maine.
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Post by jonesg »

This guy documented his "rear main seal" job with pics, it might help you.

http://cleanflametrap.com/RMS.html

sseir39
Posts: 238
Joined: 15 September 2007
Year and Model:
Location: Temple, TX

Post by sseir39 »

I have used the TDC mark on the crank or harmonic balancer and then the long part on the flexplate or flywheel at 9 o'clock. Not totally sure, but check it out on brickboard.com in the FAQ section of RWD. I have done the same thing and had to drop the transmission and redo. Lots of fun. Reading the Volvo green books can even be a little confusing, but I first make sure the front timing marks are properly set and then go under and adjust the flexplate accordingly.

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