Question about 1991 Mercedes-Benz 300 Diesel

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How do I replace the timing chain on my 1991

I took my car to a friends repair shop 1 month and a half later I get the car .I had the head machined valves seals replaced and the valves.New headgasket new chain glides etc .They finished the car I picked it up on a Thursday drove it twice on that second day it just died on the freeway. Had it towed home to take a better look at it. I checked for spark I had none, I took the valve cover off the check cam then I noticed that the top of the engine is not turning at all. Then noticed while cranking I see the timing chain jumping and noise in the middle of cover.What do you think has happened ?

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Since I can't see in there any better than you can, I can guess that the chain tensioner has failed or, one of the gears was not tightened and has come off. Hopefully, you haven't done any valve damage but you will need to check that as well. When doing any kind of internal work it must be done with no distractions or this kind of thing can happen. Too many shops compel their techs to work on several vehicles at once...When I had a shop, this was not the case, therefore I never needed to re-do a job like that. Sorry that I can't give you a "quick, inexpensive" fix for this...It needs to come apart again.
Good Luck!!

Posted on Jul 11, 2009

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Posted on Jan 02, 2017

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1 Answer

Was there a recall on timing chain for Saturn L200 2002 model?


Saturn never did a recall on them, but a little Googling will find you a wealth of knowledge about the problems that the 2.2L engines had with timing chains...more correctly, timing chain tensioners. It appears that the engine did/does not supply sufficient oil to the tensioner and approximately every 60-80K miles, it will fail and allow the timing chain to jump time. This can be catastrophic if it occurs at speed since the engine had aluminum heads and is an interference type engine. I recommend that if you have one that has failed, repair it and dump it, or just dump it. If you want to keep it, plan on servicing the timing chain every 50000 miles to avoid needing head replacement. My daughter had a 1999 Cavalier with the 2.2L engine. The first time the tensioner failed, it happened as she turned the car off and no head damage occurred. Replacement of the timing chain/gears/tensioner fixed it and then 60000 miles later, on the Interstate, it happened again. This time it took the head with it. Lesson learned.

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How many timing chain tensioners does a 2001 Toyota Corolla have?


No

They are just not capable of knowing how to
properly diagnose & repair a vehicle

That is what you get when you have to use these shops

Little better if you avoid the chain store names & go to
local 30 year old shop with same owner all that time

No reason to do one tensioner & not the other, but lack
of knowledge or the part wasn't avail

Not changing the oil or using the correct oil since the car
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I just had the head redone and it was fine at first untell it blew the intake gaskit about 3 mouth or less from the new head job and when i got it back the secound time from tis shop it smoked so i ch


A few things might be wrong ,1 they may not have plainer the head, 2 the head may be worn enough that oil is sealing into a cylinder, 3 since the head went out it's a good time to put mew valve stem seals in while the head is apart. That's if they took the head apart to do any machine work. You need to find out exactly what was done when they had your car

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Only way that can happen is if the timing belt/chain has failed and the cam and crank are no longer in phase with each other.

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1 Answer

Chain to the valve train on right side of the


Other than the chain breaking? I would recommend replacing all the chains while it is apart. Also all timing chain tensioners, tension arms & guides.

I don't have an answer to why, your specific parts,wore or broke.

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2627ab5.jpg

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I had the same lock up.


This specific set of problems took three months to resolve by ordering and patiently waiting for everything from chains to piston rings.  However, there are two other problems that I might seek your guidance with.  
1.  I have a periodic Steering Control Failed light with an ABS light. This is often resolved by balancing all tire pressures (as little as 5 psid seems to kick it off).  My concern is that there might be a larger problem in the ABS pump, since the symptoms and resolution are still somewhat inconsistent.
2.  Since the engine rebuild, I have experienced a Coolant Low Light (4x's in 5 months), with no corresponding rise in Temperature.  However the problem is becoming more frequent.  The servicing level is consistently good.  I haven't needed to add anything.
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1 Answer

Overheating after timing belt change


Hi

If you took the car into this Garage , for just the timing belt, and then after there repair, you developed the overheating, then the problem should lie with them.

Did the car ever overheat before you took it too them ?

If not, go back and ask to see the Service Manager, and give him your grievance, that if they do not fix it, you will sue !

Good Luck !

P.S. Don´t forget to give me a rating please !

John.

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