Question about 1991 Mercedes-Benz 300 Diesel

1 Answer

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 ?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Mercedes-Benz Master
  • 6,982 Answers

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


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

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.

Nov 02, 2013 | 2003 Saturn Ls 4dr Sedan

1 Answer

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


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
was new-- is the reason it failed

Feb 01, 2013 | 2001 Toyota Corolla

1 Answer

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

Apr 20, 2012 | Cars & Trucks

2 Answers

We took the head off an found that the valves are hitting the pistons on my 1997 chevy cavalier 2.2

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.

Dec 03, 2010 | 1997 Chevrolet Cavalier

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.

May 04, 2010 | 2001 Lincoln LS

2 Answers

Firing order for Spark Plug wires

Here is the diagram you ask for. While it says it is for the 3.0L V6, it is the same for the 4.0L V6 if that's what you have...


Feb 15, 2010 | 2004 Ford Ranger

3 Answers

Oil pouring out of my engine

yes. if the insurance company wont pay your stuck with the bill. not really any other option

Nov 20, 2009 | 2001 Volkswagen Jetta TDI

1 Answer

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.
Any suggestions?

Jun 10, 2009 | 1999 Jaguar XK8

1 Answer

Overheating after timing belt change


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 !


Jan 20, 2009 | 1991 Honda Civic

Not finding what you are looking for?
1991 Mercedes-Benz 300 Diesel Logo

Related Topics:

77 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22413 Answers


Level 3 Expert

83850 Answers


Level 2 Expert

169 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides