129 300SL Timing chain adjustment
 

My timing chain had not been adjusted in years. After I adjusted it my car would not start. It seems that there is not any spark from the coil. I cleaned the rotor and and the cap, but still no go. could I have cause the timing to jump. Car ran before adjustment. Is there a reading that I should get at the coil. I am willing to try anything. I need help

Probably messed something up. There is no "adjsutment" for the timing chain. Good Luck

Gilly

129 timming chain
 

I may have not correctly stated my problem. When I stated adjusted timing chain, I meant to state adjusting the tensioner ( located on the passenger side of the block, about a 21mm bolt and a hex head center. after turning these bolts the chain was tight. I have checked for any loose connections and can't find any. Will adjusting the tensioner cause this problem, no spark

There is not any "adjustment" on the tensioner either.

did you remove the positive cable on the battery? I had the same problem and it was the little red wire attatched to the positive cable terminal. good luck

That was real helpfull..
Sorry dude .. most of us here at the shopforum arn't 'that' bad.
What did it turn out to be.?

D

well excuse me, DUDE! Like far out!

I own a 1991 300SL 24V. Here is my experience. One night after work I came out and started the car. There was an unusual noise from the engine, but it did run. I lifted the hood and immediately recognised the sound of the timing chain being loose. I carefully drove it home ( about 2 miles ) at very light throttle. This sounded like a job for the pro's at the dealer shop. I expected that a gear or link on the chain had jumped due to becoming loose and I prepared myself for an expensive repair. At least it was running so no major damage? Well, it turned out to be the chain tensioner. It is hydraulic and regulated with oil pressure. So the chain hadn't jumped after all. In fact the chain, guides and gears were in excellent condition. The car had about 95K miles at the time. The tech said the because the engine has variable valve timing, the tensioner reacts to keep the chain taught to a spec'd value. The repair was surprisingly inexpensive at just under $300. Good luck with yours.