While putting on a new timing belt...and everything else...I noticed that when the Crankshaft was exactly on the mark, the camshaft was 1 tooth off (counterclockwise of the mark).

What would the results of this be? Would one tooth make a big difference or just cause it to run a little funny (rich, lean etc)?

Thanks
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1991 740 B230F 135K miles

BTW I meant to say that the existing timing belt was off by 1 tooth. I plan to put the new one exactly on the marks, as soon as I fix my broken camshaft pin.

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1991 740 B230F 135K miles

Ordinarily I'd say it would make a big difference. However, if you've got LH-Jetronic 2.4 it may very well not make a difference. I don't know if the Regina stuff is adaptable or not, but if it is.. you would probably see the same result: the car will adapt to the problem and run quite well, maybe even as well as it would ordinarily.

When you put everything back together properly, if you haven't already make sure that you disconnect the negative battery cable. Make sure any learned behavior is cleared.

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alex

'89 765T, 174,5xx mi

If your belt was off one tooth, no harm was done, not in a B230, and not by one tooth. The opening and closing of the valves wasn’t in perfect mesh with the pistons.

I had a no start condition for a month until I found that the pulley had rotated on the cam due to a sheared indexing pin. The piston was on power stroke and the cam was on the intake stroke. The roll pin is an M5-8 to 20mm long. I picked one up at a dealer for 90 cents. A well supplied hardware store may have one too.

A word of caution Greg, if part of the old pin is stuck in the cam, you will have to drill it out using smaller to larger “solid carbide” drill bits. The roll pin is spring steel. High speed steel or carbide tipped bits may break off in the hole while drilling. If you have already done this, the Volvo gods were looking out for you.

I had also removed the cam to install the new pin. I just couldn’t see putting lateral impact force on the cam bearings to pound the new pin in. I placed the cam on a solid block of wood and just tapped the new roll pin in with a hammer. Good time to change the valve hushers while the cam is out. If you remove the cam, loosen each of the cam bearing bolts a half turn at a time.

It’s just like a plumbing job, isn’t it.
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Tom F. Three 940s. '93 T-Rex now running. Mods, RainX. Lien holder on two more (the kid's). Rust In Pieces, '78 245

i have always installed solid version of that pin (sometimes made from suitable diameter drill), as on the older volvo engines. have not met this happening on B19/B21/B23 due to solid pins installed there...maybe i have not seen sth???
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i prefer non-german cars