Engine Timing .. Need help
#51
Junior Member
Thread Starter
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?
“ 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?
The following users liked this post:
BlackML550 (06-20-2024)
#54
Junior Member
Thread Starter
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.
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.
Last edited by The_Pharoah; 06-20-2024 at 08:15 PM.
#55
Super Member
Gears
From the pictures the gear tooth look good. Any wear items beside the chain?
#57
Junior Member
Thread Starter
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?
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?
Last edited by The_Pharoah; 06-22-2024 at 04:18 PM.
#58
Super Member
40degrees ATDC correct? Not before TDC but after
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?
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?
#61
Super Member
steps
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
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
Last edited by vesiadog; 06-22-2024 at 06:06 PM. Reason: wording
#62
Junior Member
Thread Starter
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.
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.
Last edited by The_Pharoah; 06-22-2024 at 06:32 PM.
#64
Super Member
camshafts
@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)
#66
Super Member
#70
Junior Member
Thread Starter
M272 Upper Oil Pan Resealing
it's been a whhile since I updated the status, I was busy and I also hurt my neck getting under the car removing the upper oil pan bolts, I took some time off.
Now I am back at it, so I borowed an engine hoist and lifted the engine, Mercedes says you can hoist the engine, I was able to move the Upper Oil Pan freely and I resealed the upper and lower pans while the egnien is lifted.
Here are the sealant track and the bolts location for the Upper Oil Pan, torque is 10nm for all except the two bolts Number 3, they're 20nm and bolts 4 to the bell housing are ( unconfirmed 40nm) If anyone knows please reply.
The lower Oil Pan is 10nm all over just make sure you're using the bolts with the inserts for the bracket that bolts to the lower oil pan.
Now I am back at it, so I borowed an engine hoist and lifted the engine, Mercedes says you can hoist the engine, I was able to move the Upper Oil Pan freely and I resealed the upper and lower pans while the egnien is lifted.
Here are the sealant track and the bolts location for the Upper Oil Pan, torque is 10nm for all except the two bolts Number 3, they're 20nm and bolts 4 to the bell housing are ( unconfirmed 40nm) If anyone knows please reply.
The lower Oil Pan is 10nm all over just make sure you're using the bolts with the inserts for the bracket that bolts to the lower oil pan.
Last edited by The_Pharoah; 09-04-2024 at 07:46 PM. Reason: More Pictures