M110 engine timing setup

[fichtl500]

I need your advice, I don't understand the technical manual. Do I have the chain set up correctly?

M110

The manual tells me that the DTC mark is on the pin. DTC is not 0/0

Please confirm so I can continue composing.


(I also don't understand how DTC and BDC can be side by side. When the real difference between them is 180°)



.

[rumb]

Cant access manual currently due to web issues.

TDC should be the crank line that has 0 on each side, as is BDC.  The pin is for the the crank position sensor.


WITH NO CHAIN INSTALLED, TDC AND BDC are the same thing, the #1 piston will be at top of stroke. Remember the cams turn 1/2 speed of the crank.

Put crank on 0/0 mark and then line up cam marks. Then instal chain.

[fichtl500]

I don't understand anything anymore. I don't know where to set the crankshaft. The line on the engine block is for the sensor. I don't have a cam puller. I had a lot of trouble putting the chain in there at the same time as the crankshaft.

You say I have it wrong, that means my crankshaft is wrong by one tooth.

[rumb]

I'll get back as soon as the online manual is working again.

[Max-NL]

According to the workshop manual : https://handbook.w116.org/Engine/110/01-415.pdf

On some vibration dampers there are two 0|0 marks with a 180° difference, for TDC and BDC. If this is the case TDC is the 0|0 mark with a pin next to it. BDC 0|0 mark should not have a pin next to it.

You need to align it to the 0|0 mark next to the pin, this will be TDC for the crankshaft.

[fichtl500]

I'm back, new chain and new tensioner.  Unfortunately, the intake cam is half a tooth off the mark.  Is there any solution?  Or is it that good?

[polymathman]

The manual will give you a procedure to measure the correct timing. Knowing how many degrees you need, you can order an offset woodruff key that has the offset machined in

[fichtl500]

Unfortunately, I don't have special measuring tools. I don't even have a cam gear removal tool.

I'll probably throw the engine away and buy a new one. It costs a few crowns

[Randys01]

Id be zipping it back together and running it.  On a brand new motor in an ideal world the last few mm we might chase but I doubt you'll know the difference.