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B6304 engine, 181 HP vs 204 HP changes 900

uid 19's pic
posted by  jbowers on  Mon Feb 2 03:09 CST 2004
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last visit: Sun Jan 22 13:49 CST 2012
[RELATED]

You can't tell anything by the timing marks. The cam pullies have a lot of adjustment on the ends of the cams. (Notice the slotted places where the cam bolts are installed.) The cams are set using fixtures that lock the crank at TDC and the cam at their design timing. The pullies, belt etc. are then installed and the marks added at the end as references for belt changes.

There have been cases of guys here on the board with marks that were no longer valid because a tech was sloppy while changeing cam seals or ??? and put the pullies back without regard for the existing marks.

I've got a set of cams from an early, pre '95, sitting in my workshop waitig for the weekend when I have my other projects under control and the "honey do" list taken care of. I've made careful acceleration runs and mileage checks to compare before and after. I've also measured the lift profile on the early cams to compare with my '96 cams after I do the exchange.

If anyone makes this switch before me I'll sure be interested in the results. BTW, I've also purchased a set of Volvo cam timing tools. The same tools are used for the 850s, '70s and the '40s with the 5 and 4 cylinder versions of our engines.
--
'96 965 with 16' wheels at 112K. Had '85 745 Turbo Diesel for 200K.






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