1- 360
2- 360
3- 350
4- 360
5- 340

Yee-haw, I think......
Please confirm the urge to celebrate.

Thanks again.
Jay

__________________
Wordmanjay
Tribetown, Ohio

pretty nice.

people get so concerned about the value of the compression when its the relation of all the values that makes for a smooth running engine.

thats what you have.

Whoo Hoo!!

__________________
83 SD

84 CD

Elaborate, if you could.
I'd like to know a little more about what values to consider.
Thanks in advance.

__________________
Wordmanjay
Tribetown, Ohio

The first whoo hooo has arrived....this is good.

__________________
Wordmanjay
Tribetown, Ohio

the factory spec for the engine is 10% (someone correct me) variance between all cylinders at most.

your highest and lowest scores are well within that.

although the factory spec for highest value of compression is a bit higher than your numbers, you are within the "healthy" engine range.

I definitely give you a "woo-hoo" too

What is the factory spec for highest value of compression?

__________________
Wordmanjay
Tribetown, Ohio

wow many exclamation points with the good #s me hopes for similar with the ones sitting around-have to take the head off one.

30 bar

or

435 psi

is the best "normal" compression value given.

The 617.95 service manual lists normal compression as 24-30 bar. Minimum is 15 bar. Maximum difference between individual cylinders is 3 bar. (These figures are with the engine at normal operating temperature.)

Hi
Those are good solid numbers! Was the engine at operating temp (85C.) just before testing?
Joseph

The engine was cold.
Please tell me about how this affects the test.

__________________
Wordmanjay
Tribetown, Ohio

A cold engine will generate a lot less pressure in the cylinders for two reasons.

The rings seal better at temperature, and the heat from the cylinder walls increases the temperature of the compressed air a bit.

Plus the fact that the valve-clearances are smaller when cold, and affect compression measurements....

And, Cranking will be slightly faster, as there's less drag of thick oil....

Prolly add maybe 50 psi to those 'cold' numbers for a good, hot engine....

__________________
http://i190.photobucket.com/albums/z...0TDnoplate.jpg

Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....

Where did you take the readings from? Glow plug or injector? Which tester?

__________________
85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked