When I checked my timing chain elongation using the 2mm method, I came up with a value of 19 degrees BEFORE top dead center. The spec for my car is 11 degrees ATDC. The car runs, but not great. When I set IP timing to 24 degrees BTDC, the car crapped black smoke and had almost no power. Lining up th cam marks, the value is 7 degrees ATDC. what could account for such a discrepancy? The car is an 83 240d.

Ignore the cam marks.. read the ref in my signature..
cam marks not accurate enough for diagnosing anything.. only used upon initial build of the engine... 2mm movement correct 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/showthread.php?t=156207&highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

Disregarding the cam mark values for the moment, The 2mm value of 19 degrees BTDC is way off. I have performed the 2mm test successfully seven times. Three times I got 20-21 degrees BTDC probably due to the dial indicator shaft not being vertical. The last four times were today. All at 19BTDC. The issue as I see it is that my 2mm readings are in the other side of TDC from where they should be as I understand the maintenance manual value for the test to be 11 degrees ATDC.

Last year there was another member who was getting the BTDC readings. It turned out he was doing something wrong.
But, I can't remember exactly what it was.

If someone installed an offset Key the wrong way it could cause some issues.

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84 300D, 82 Volvo 244Gl Diesel

this thread?

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

or THIS ONE it has a bent pointer...

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

methinksmethanks!

Yes! Thanks! Phew!

So are you going to check for an offset key now?

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Please take a photo of your results that clearly shows the position of the pointer and the numbers.

Post it on the forum, please.

Ummm, Yes. Now.This day. Got hung up on result of test for better or worse.

Brian we're all experiencing trouble uploading pictures / attachments. I've sent Wayne a PM...

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!