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Cam alignment issues after cam seal replacement

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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dad2three
Posts: 17
Joined: 8 May 2015
Year and Model: 99 V70 GLT
Location: Madison, WI
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Cam alignment issues after cam seal replacement

Post by dad2three »

Question for those much more experienced than I with setting timing belts on a 99 2.4 LPT w/ VVT. I needed to replace cam seals so did the whole job with timing belt and water pump. I set the VVT hub as per Vida- bring outer ring to CW limit, align with mark 1 cog before the mark, tighten to 88 ft/lbs making sure it doesn't move. I get the timing belt on and tensioned, remove the cam locks, and rotate the crank. My marks all align, but my exhaust cam is rotated further forward about the thickness of the lock tab on the cam lock. This result is consistent no matter how many times I remove and reset the belt. Any ideas/suggestions?
Darrin
99 V70 GLT

dad2three
Posts: 17
Joined: 8 May 2015
Year and Model: 99 V70 GLT
Location: Madison, WI
Has thanked: 3 times

Post by dad2three »

I’ve tried 3 different ways of setting the vvt hub (Vida, one I found on MVS, and another way described on Swedespeed). I’m thinking that the hub may be messed up so I’m installing a new vvt hub today.
Darrin
99 V70 GLT

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wizechatmgr
Posts: 1798
Joined: 12 January 2017
Year and Model: 1999 V70 XC AWD 2.4T
Location: Albany, NY area
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Post by wizechatmgr »

dad2three wrote: 30 Oct 2020, 12:44 Question for those much more experienced than I with setting timing belts on a 99 2.4 LPT w/ VVT. I needed to replace cam seals so did the whole job with timing belt and water pump. I set the VVT hub as per Vida- bring outer ring to CW limit, align with mark 1 cog before the mark, tighten to 88 ft/lbs making sure it doesn't move. I get the timing belt on and tensioned, remove the cam locks, and rotate the crank. My marks all align, but my exhaust cam is rotated further forward about the thickness of the lock tab on the cam lock. This result is consistent no matter how many times I remove and reset the belt. Any ideas/suggestions?
It's going to do some crazy stuff without oil pressure regulating it. If it isn't making contact with the valves, fire it up at idle and see if she codes. I believe we found that the tolerance for the ECU is about a tooth or so in either direction. Abscate and I just worked on one of these, he may be able to give details and possibly even pictures.
Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD 2.4 T -- ~231k miles
1998 V70 2.4 NA -- ~184k miles

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