How tough to replace timing chain, etc. on 88 560sl?

[toms560]

My 1988 560SL has 125K on it and I'm worried about the timing chain. Not that anybody said it was bad, the dealer checked and said it was OK. Just the mileage and the threads I read. I'm a moderately capable mechanic, so my question is, How difficult is it to replace the chain and tensioners on this vehicle? Dealer wants $1000-1200 for it, total parts my cost is $400. Thinking of tackling it, any thoughts or experience? Also is there a good explanation of how to do it somewhere? The CD of the car leaves a bit to be desired. Thanks

[nhdoc]

I have the same exact car and am weighing the pluses and minuses of doing it myself. Check out the booklet "preventing catastrophic engine failure" on www.**************.com for a good illustrated method. I already replaced the cam oilers using this booklet and am leaning towards doing the chain and guides myself too.

[Strife]

I will tackle this late summer/early fall (I've got 87K), and I think having the right tools is critical. So, I got:

1. Valve spring compressor (expensive , $160)
2. Pin remover for chain guides ($60)
3. A "lid" hinged device that screws on over the front cam bearing holding the chain down - this is supposed to make this a one-man, no-chain falling into the engine job - $60.
In the hopes of doing the valve stem seals, I got installers (2 sizes, $25 ea) and some pliers.

Even considering this, I hope to be money ahead. Besides, I might rent these out.

[nhdoc]

The only other tool you need to to the chain is a grinder in order to grind down the ends of the pins and remove a link from the old, continous chain. Either an air-powered die grinder or a dremel or drill wheel would do the trick. The new chains all have removable master links so once you put one of them in the next time you won't have to grind.

Did this job last year.

I used a cheap ($20 +/-) subscription to Thomas Pindelski's MB repair site. Great illustrated step-by-steps for this and many other jobs.

This was one of the first things I did to a car that needed a lot.

If you have any mechanical inclination, this is a great, challenging, enjoyable learning experience.

Rich Mayer
82 500 SL

[Roncallo]

Originally Posted by Strife

I will tackle this late summer/early fall (I've got 87K), and I think having the right tools is critical. So, I got:

1. Valve spring compressor (expensive , $160)

I have a KD universal OHV spring compressor. I had to re-angle the handel but it works just fine.

2. Pin remover for chain guides ($60)

A bolt, washer and a socket that will just clear the pin will do just fine.

3. A "lid" hinged device that screws on over the front cam bearing holding the chain down - this is supposed to make this a one-man, no-chain falling into the engine job - $60.

I never used this, but with the second person being my all thumbs wife, I am considering it.

In the hopes of doing the valve stem seals, I got installers (2 sizes, $25 ea) and some pliers.

Usually, disposable ones come with the valve seals

Even considering this, I hope to be money ahead. Besides, I might rent these out.

Good Luck
John Roncallo