Timing chain

[roger129]

please help any one with step by steps haw to change the timing chain on 1991 300 sl

Thank you

[waybomb]

I am interested in this as well.

[bbrewer]

At what mileage on one of these engines should someone start thinking about timing chain replacement??
I'm at 92k, so probably have a while, but it's never to soon to add something to the To-Do list.... After the A/C.... and after the window motor.... :-(

Thanks!

[edboyles]

They should be changed at 100K intervals.......do a search and you will find tons of info..........

[roger129]

Originally Posted by bbrewer

At what mileage on one of these engines should someone start thinking about timing chain replacement??
I'm at 92k, so probably have a while, but it's never to soon to add something to the To-Do list.... After the A/C.... and after the window motor.... :-(

Thanks!

126k and it was not the timing chain only it is the crank shaft and the price at the dealer for the crank shaft only 1200$ canadian the timing chain 300$

[bwheitman]

Wow, what happened to your crank shaft? I have never heard of one of those failing on a 104. There is a page you will find if you do a search on the 104 head gasket that shows you how to remove the head and get started. If you have to remove your crank shaft and not your camshaft, I would suggest you remove the entire engine so you can mic it and do it right. Good luck!
Brian

[roger129]

any one know where to buy crankshaft for 104 engine

[deanyel]

Originally Posted by edboyles

They should be changed at 100K intervals.......do a search and you will find tons of info..........

100k? it's a short path double row timing chain. I've never even heard of a timing chain failure on a 104 motor - at least on a factory unmolested chain. Tensioner maybe, if you must do something, but you are doing yourself a great disservice to change out a 104 timing chain at 100k. The tons of info from a search will not be 104 motor related.

[tecqboy]

On my 300Sl it only sounded like the timing chain was bad (90K miles at the time). It turned out to be the hydraulic tensioner. Only cost $250 bucks to repair at the dealership. The mechanic checked the chain itself and pronouced it in excellent condition with no appreciable stretch. Adsit sells short blocks and most other engine components.

[halman2228]

Tecqboy -

You must be going to a mythical "honest dealership". The tensioner is a $60 part at a parts store (= $150 + at the dealer). Toss in some genuine "MB Dealer Labor" and I believe you came away from that one relatively unscathed.

I think roger 129 has left out a lot of infomation or is confused about which "shaft" needs replacing - I've not heard of a thrown or jumped chain ruining the crank.

But then again, I get surprised by my ignorance everyday...


Kevin