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#1
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'Normal' timing chain stretch
Hi all,
This is a question that's really been bugging me ever since I carried out my first valve adjustment. I wanted to check my chain stretch using the cam spocket/tower mark to crank balancer method. When lined up I saw the marker at the crank between 3-4. The car only has 129K so I don't think that's correct or can it be possible? Thanks! |
#2
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The chains stretch anywhere from 2 - 3 degrees after approximately 20,000 km.
Being that we don't know what car your talking about or giving the fact that you didn't measure the stretch the proper way I would say it's normal. Danny PS, you can easily add yourvehicle info to your signature, just hit the USER CP button up top.
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1984 300SD Turbo Diesel 150,000 miles OBK member #23 (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination |
#3
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Going out on a limb here, but I think he has a 78 240D.
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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar. 83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles 08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles 88 Jaguar XJS V12 94,xxx miles. Work in progress. |
#4
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Quote:
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84 300D, 82 Volvo 244Gl Diesel |
#5
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You used to be a Code Breaker in the military... right ?
LOL
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#6
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Quote:
So get off his case with the technically demanding questions... LOL
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#7
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Thanks gentlemen!
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#8
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Anytime !!!
There are huge threads in the archives which will fully cover this procedure....
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#9
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Quote:
"I was drunk and I missed it" (from the old song).
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84 300D, 82 Volvo 244Gl Diesel |
#10
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I thought lining up the mark was good for a rough estimate for stretch though? I guess there isn't much excuse when a dial indicator is only about 15 bucks from harbor freight, but still... Nothing exact, but a good ballpark?
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TC Current stable: - 2004 Mazda RALLYWANKEL - 2007 Saturn sky redline - 2004 Explorer...under surgery. Past: 135i, GTI, 300E, 300SD, 300SD, Stealth |
#11
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Quote:
I believe it was Brian Carlton who was keeping track of the readings different member got when they did it both ways. If he reads this maybe he will chime in. Lining up the mark is exceptionaly close but only if you do it with care nd get your face down their near the marks to make sure if they are lined up. If you are observing at any sort of an angle and from a foot or 2 away you decrease your chances of lining it up accurately. Not a bad idea to do it 1-2 time more after the 1st reading to see if you get the same degrees each time.
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84 300D, 82 Volvo 244Gl Diesel |
#12
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The FSM specifically forbids using that method...
Brian was not using hundreds of cars in his comparison.. so you really can not extrapolate that to all other cars... I do not know what variables might change that relationship .. thus I always point out that the FSM... printed by MB specifically says DO NOT use that for checking the chain elongation. It is your car though... so whatever one does with their car is pretty much their business as far as I am concerned... but I do have a problem with using the information ... when in conflict with the FSM ... to promote others ( read newbies ) doing the same with their cars... just not fair to the newbies...
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
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