AD41A Timing

[crewejd]

Hi all,
I'm having a couple of block threads repaired by a machine shop and doing as much dismantling as I can before taking it there.
I'm looking for affirmation that the steps I'm about to take, will not impact the valve timing, or injector pump timing:

Before removing any gears from the timing case, I'll do the following:

1: align crank so that the dot aligns with the centre of the engaged teeth in the upper intermediate pulley
2:align camshaft so that one dot is engaged with the intermediate pulley centre teeth
3: Align fuel pump gear so that it engages with the dot on the camshaft gear.
4:The injector pump gear face appears quite corroded and is making it difficult to see any markings. So before I take it apart, put some paint on the groove that is aligned with the camshaft gear second dot.


Is there any special position or criticality of the gear between the crank and the camshaft?

As the fuel pump gear only has surface corrosion on the face that stares at the seawater pump, and otherwise looks fine, I wasn't going to replace it. Is this a bit daft?
Ensure all gears mesh with their peer gears) - I am hoping I can twizzle the oil pump gear to fit the crank, and similar with the intermediate gear between the camshaft and crankshaft.
See if I can video the process so if it all goes wrong, I can offer it up for £250 for you've been framed...

Thanks for reading!


Putting it back together, as these are helical gears, ensure I twist them on , whilst carefully ensuring the dots are lined up as before.

With all the shafts, do any of them turn readily, or are they all too stiff to vibrate off settings as the engine is in transit to the workshop?

 

[dragoon]

I timed one of my 40s some years ago, but this was just to adjust the injector timing. Sorry I can’t help with your specific questions.

However, just to add that the timing marks were on the flywheel, accessible through a port in the bell housing.

A DTI on the back of the injector pump was required in combination with the timing marks to set it up.

The procedure was in the manual - whilst I get that you are trying to avoid touching the injection timing, you may want to check it to get a reference that you can compare after reassembly. Good luck.

 

[dragoon]

Also, was going to add - if you're on Facebook , join the group "Volvo Penta Victims" and post the same question on there. You may get a broader response, especially if you have a photo or 2 of your engine to post....

 

[crewejd]

Also, was going to add - if you're on Facebook , join the group "Volvo Penta Victims" and post the same question on there. You may get a broader response, especially if you have a photo or 2 of your engine to post....

Will do! Thanks!