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M110 engine timing setup

Started by fichtl500, 13 September 2024, 11:14 AM

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.

'68 250S
'77 6.9 Euro
'91 300SE,
'98 SL500
'14 CLS550,
'16 AMG GTS
'21 E450 Cabrio

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.
'68 250S
'77 6.9 Euro
'91 300SE,
'98 SL500
'14 CLS550,
'16 AMG GTS
'21 E450 Cabrio

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.
1971 R107 350 SL
1972 W108 280 SEL 3.5
1975 W116 280 S
1975 W116 450 SEL 6.9 #140
1977 W123 230
1992 W124 230 CE
2001 Ducati Monster S4

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
190sl 1957 rusting away
250S 1968 long gone
280SE 1976 got hit, parts
280SE 1979 running fine
C320 4Matic 2005 for wife -Mercedes after MIT

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.