All the installs I see indicate the alignment of the marks on the timing belt cover, block and timing gears. None of these account for the possibility of a gear turning out of sync with the belt.

What happens when due to the timing belt breaking the alignment points on the gears are no longer related to the timing belt?

In my thinking if the alignment marks on the gears always aligned with the marks on the timing belt cover and block, then every full revolution the timing marks all come into alignment. That does not happen ... or is it supposed to?

I did see one reference to popping the distributor cap to check the mark inside the distributor for alignment to the intermediate gear.

What am I missing in the alignment process?
How do I know the gears are all turning in sync?
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1988 244 DL; B230F; LH-2.2; Manual 5-speed (M47)

"None of these account for the possibility of a gear turning out of sync with the belt."
The gears are all turned by the same timing belt which has teeth, so they all turn the same amount and don't go out of sync with the engine (once set in sync).

"What happens when due to the timing belt breaking the alignment points on the gears are no longer related to the timing belt?"
When the belt brakes, the gears do go out of sync. That is why there are alignment marks on the gears and engine so you can put the gears back in sync with the engine when putting on the replacement belt and locking it down. The marks on the belt aren't necessary and can be ignored.

"I did see one reference to popping the distributor cap to check the mark inside the distributor for alignment to the intermediate gear."
Often the alignment mark on the engine for the that gear is hard to see, so lining up the rotor, which is turned by that gear and so is in sync with it, with the scribe line on the distributor (indicating cylinder 1 and therefore TDC) is used.
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1980 245 Canadian B21A with SU carb, M46 trans, 3:31 dif, in Brampton, Ont.

Thank you all.
I was worrying myself into something that was not happening.

So what is happening is ... the timing marks are the timing marks ... they are all set to fire on the number one cylinder and the timing marks do not align when the engine is firing on the other cylinders.

I do not now know where my head went. Maybe too much sun working under the hood and really not wanting to pull the belts if I was not understanding something so basic.
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1988 244 DL; B230F; LH-2.2; Manual 5-speed (M47)

Scroll down to "locating top dead center".

https://www.brickboard.com/FAQ/700-900/EngineSealsBeltsVent.htm#TimingBeltTips
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Post Back. That's whats makes this forum work.

That information looks familiar from my research. I do not see that it answers the question.

How are the timing marks set if the position of the timing gears can not be trusted ... as in after a belt breaks.
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1988 244 DL; B230F; LH-2.2; Manual 5-speed (M47)

How are the timing marks set if the position of the timing gears can not be trusted ... as in after a belt breaks.

You physically reposition the three shafts per the instructions that aleekat has directed you to. Pull the spark plugs for easy positioning of the crankshaft. Do this, install the belt and all three shafts will be in sync.

The camshaft and intermediate shaft make one half revolution for every full revolution of the crankshaft.

The rotor shouldn't be a concern unless the distributor has been removed and reinstalled.


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'80 DL 2 door, '89 DL Wagon, '15 XC70 T6

When my belt broke that's the procedure I used.

https://www.brickboard.com/FAQ/700-900/B230FTimingBeltAlignment.htm

https://www.google.com/search?source=hp&q=88+volvo+240+timing+belt+install&oq=88+volvo+240+timing+belt+install&gs_l=psy-ab.3..33i22i29i30k1l2.2176.21120.0.22500.44.37.6.0.0.0.171.4332.0j34.35.0..3..0...1.1.64.psy-ab..3.41.4531.6..0j38j35i39k1j0i131k1j0i20i264k1j0i22i10i30k1j0i13k1j0i13i30k1j0i22i30k1.128.wCp6VFq-sfM
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Post Back. That's whats makes this forum work.