The_Pharoah

I think you'rer talking about the crackshaft, I am still working on getting the timing cover off, I have the procedure down but sicne I need a seal remover and cleaner to clean up the oil pan and middle piece, I will hae to wait a few days till I get them, I already ordered.


“ You must align the cam gears to each other and the machined surfaces of the cylinder head where the cylinder head covers bolt down"

Trying to understand this:

ligning the cams to the machined surface is a must, they will not sit any other way, but with the valve open or close? Should the Intake and the Exhaust cams match, and should the Left and right sides match?

BlackML550

See attached Star Bulletin that highlights Engine Nos, not VINs regarding timing chain issue.

The_Pharoah

@BlackML550 Thanks, I think I am good, my engine number is 272967 30 833257.

The_Pharoah

OK, you guys were right, I had to remove the oil pan.
Removed the 4 screw on the bottom of the engine mounts, 2 on each side.
Lifted the engine with my 3 ton jack about 4 or 5 inches, got to the oil pan bolts except the one on the side of the driver side (a pain to take out)
removed the oil pan and then I was able to remove the timing cover. Pried it out carefully.

vesiadog

From the pictures the gear tooth look good. Any wear items beside the chain?

The_Pharoah

Nothing, no wear anywhere, the chain looks very good but will not line up, I'll try later on and see if I can line it up.

The_Pharoah

Update:

I wrapped the chain after marking the yellow links and each is in it's position:
The Engine is @ 40 degrees
Crankshaft - square plastic notch
Camshaft - three notches
Intake (Left and Right) Gears - matching the letter R and the letter L

The side notches on the intake gears do not sync with the bottom of the head cover.

I rotated the engine to 305 degrees once, and then up to 6 times and still I can't see the stamps through the sensor opennings on the camshaft front covers.

I am close to lining the timing chain and gears proeprly but not there yet, any thoughts, help?

vesiadog

You have the 40 degree after TDC correct?

The_Pharoah

Yes, 40 degrees.

I rotated the harmonic wheel till t got to 40.

vesiadog

vesiadog

1. remove exhaust camshaft & intake camshaft at right cylinder head.
2. disconnect old chain
3.draw in new chain
4. turn crankshaft to 55 before tdc of first cylinder (305 mark on the bent pulley)
5.turn crankshaft thru 95 degree to 40 degree after ingnition TDC
6. install camshafts right side




https://mbworld.org/forums/attachments/m-class-w164/416489d1525893384-engine-timing-r-i-timing-chain-272-3-eng..pdf
paste that in your browser and it is the pdf where I obtained the info

The_Pharoah

You think I need a new chain?

I think I need to see how the camshafts sit on the head, maybe that is my issue of not lining up the gears. A pictuer of which way the camshafts sit on the intake and exhaust sides would make thing clear for me.
After all I am new at this.

The_Pharoah

@vesiadog This is my issues, WIS is showing this diagram with 3 bores in camshaft and my camshaft has two bores which confuses me on which way to lay the camshaft on the head and tighten the retainers. (See red arrow)

vesiadog

Absolutely make sure since you have 4 camshafts you are not mixing up picture and info… very easy to do.

The_Pharoah

I wouldn't know until I see how the camshafts sit on the head.

vesiadog

How many camshafts do you have off the engine right now?

The_Pharoah

The right side (Pax's Side) Intake and Exhaust. The left side is still on.

The_Pharoah

Does anyone know the bolts sizes and torque specs for the timing cover? Bolts 1,2 ,3,4, and 5.