Already searched around a bit, but still not sure about where to get the gauge to check timing chain stretch. Is it a mercedes specific tool, or can I get a regular old dial gauge at autozone?

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Ich liebe meine Autos!

1991 Mercedes-Benz 560SEL | Megasquirt MS3-Pro | 722.6 transmission w/ AMG paddles | Feind Motorsports Sway Bar | Stinger VIP Radar | AntiLaser Priority | PLX Wideband O2 | 150A Alternator | Cat Delete
1981 Mercedes-Benz 300SD | Blown engine, rebuilding someday...
1981 Mercedes-Benz 300SD | Rear ended, retired in garage.
2009 Yamaha AR230HO | Das Boot

Excessive speeding? It ain't excessive till I redline!

i used a standard 1" dial gauge. i would recommend using the vise grip style mount opposed to the magnetic base style.

Something like this one:

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

That E-bay gauge looks exactly like the one I bought at Harbor freight for $10.00. usually HF has them for $14.99. but got if for the on line price they had listed. bought the magnetic base for $10.00 also.

WOW! $24.99 and $7.90 shipping also.

If you print out the on line price, the store will honor it.

The EB seller and HF gauge are both made in China.

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

I don't even attempt to estimate 'stretch' and instead just check the timing. I advance the cam and IP timing about 2° to 4° from specification when I rebuild/repair a 617. This allows the engine to 'stretch' itself into tune rather than out of tune...Robert

Sorry if I ask a stupid question, but how are you measuring chain stretch with a dial gauge? Are you moving the crank back and forth while the gauge is on one of the links? What's the spec? I've done it where the cam is set at zero degrees and the cam then tells how many degrees of stretch are present. Anything past four risks valve/piston contact. Thoughts?

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mjk

'84 300SD 119KMi (Liesl der Diesel)
'84 300D 326KMi when the oil left (former parts car)
'82 300SD 253KMi (new parts car)

This is not a measure of chain stretch, it is a measure of cam timing...

If you can get a 2" travel dial thats what you want. Otherwise you have to hit the cam at an angle.

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1995 E420 Schwarz
1995 E300 Weiss
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#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

Please explain what you are describing. And how am I supposed to measure chain stretch with this instrument???????

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Dionysius

LOL, I am pretty sure that is not 2 INCHES...
There are lots and lots of threads in the archives describing how to do this correctly..
Turning the crank back and forth is not recommended ...AND would not in any be related to checking the elongation of the chain.
I think Rick Miley has the reference to the best thread... I always have to ask him for it... he appears to be an information fanatic.... LOL

Yes, but the cam is not directly geared to the crank, it is connected through the chain. Thus as the chain stretches, the cam timing changes as a result. So isn't cam timing a direct indication of the chain stretch? Or is there a compensation mechanism somewhere that is supposed to adjust for this?

Not looking for an argument here, this is something I recall from other forums I've read.

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mjk

'84 300SD 119KMi (Liesl der Diesel)
'84 300D 326KMi when the oil left (former parts car)
'82 300SD 253KMi (new parts car)

You can get offset woodruff keys for the cam, so its stretch relative to the offset.

__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

Greg emailed me and said he mentioned my name. Of course he knew it would drive me CRAZY until I found this and posted.

Here's my original post, with the links to the the other two threads.
OK, so I'm thinking about changing the timing chain...

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Rick Miley
2014 Tesla Model S
2018 Tesla Model 3
2017 Nissan LEAF
Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro
Chain Elongation References

Thanks Rick,
I knew you were organized... but until just this week I really did not understand the extent of your ' information retrieval syndrome ' .... LOL
So, 'mentioning you by name' will be placed into my information retrieval procedures from now on... a real work saver for ME....
LOL

Who needs a search engine hehehehe

__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42