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97 V90 Installing head, Where is the timing mark??? Yikes S90-V90

posted by  david hunter on  Sun Jan 29 09:48 CST 2006
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last visit: Mon Jun 30 22:10 CST 2014
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Walt,
Thanks for your help.
I found the crank timing mark on the pulley, it is a very small cutout or slot right at the rear edge. I think you are correct, the mark does not indicate TDC, it is about 80 or so degrees away from TDC. I discoverd this by probing the #1 spark plug hole. I suppose a reason for that may be so that when installing a belt the cam lobes are not "loaded" against valves. If a lobe was at the top or on the slope the cam would tend to spin away from it's mark. By finding a neutral point in the cam revolution it would make it easier to install a belt, but that's just my guess.

Thank you for pointing that out, I was worried that the pulley had sheared something and slipped. However that is not likely as it is mounted to the crank on a spline with a bolt torqued to 200 plus lbs. I seem to remember the B230 engines have a keyway.

My next problem is that when the belt started moving forward it cut away the cam timing reference marks on the upper plastic cover, so I have to get a new top cover piece. Otherwise the job is going OK. Will keep advising.
--
David Hunter






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New 1 97 V90 Installing head, Where is the timing mark??? Yikes [S90-V90]
posted by  david hunter  on Sat Jan 28 07:46 CST 2006 >


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