have you replaced the valve cover gasket recently?this can be a source of oil leaks onto the injectors

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michael cole 1980 300SD gone now but not forgotten,87tdt,90 300te 4matic 95 e320 wagon

Have you checked the valve clearance since your major service. The drop in fuel mileage is a puzzlement.
Be interesting too get the compression numbers.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

That compression tester screw into the injector hole or glow plug?-quote

The one I have, U.S. General, made in China, isn't that nice? Anyway, has adapters for either. Will need to have all out whichever way you go. When I replaced my GP's on the SD, I wasn't smart enough to do a test.

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83 SD

84 CD

One step at a time... No, I didn't check the valves and the valve cover is not leaking, this is one reason why I want to wait for the compression numbers and eventually for the injector test results before I go there. You never know, maybe it's fixed with some new injectors; or the compression is so bad that I won't even bother anymore and start looking for a new engine instead, or even better, a new car. Now that I moved up from a 240D to a SDL, my wife wants one, too...

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'99 S420, 155k
'91 VW Vanagon GL, 150k
'85 VW Vanagon GL, 120k
'82 VW Westy, aircooled, 165k

I waited almost two weeks for the compression tester and now I'm not even sure anymore if I really wanted to have this tool. It's too honest . OK, here are the numbers:

#1 - 180 psi (this is the oily injector one)
#2 - 300 psi
#3 - 240 psi
#4 - 330 psi
#5 - 260 psi

Why are there such huge differences? #1 is obviously bad, but #4 is almost like new. Interpretations and advice, please...

I could get a used engine with 130k miles for 1800-2000 bucks installed, I just don't have 1800-2000 bucks.

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'99 S420, 155k
'91 VW Vanagon GL, 150k
'85 VW Vanagon GL, 120k
'82 VW Westy, aircooled, 165k

I'm not sure if you mentioned doing a valve adjustment or not, but that would be the place to start. After that is accomplished, a few tbls of oil down the injector hole will help diagnose rings. A significant jump in pressure after oil addition will point to rings. Search compression, and leak down, and you will find loads of info on this
bb

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For Sale: 1982 MB 300TD
1995 Chevrolet Suburban 6.5TD

Sold: 1980 IH Scout Traveler- Nissan SD33T Diesel

OK, here are the leak down numbers:

#1 - 180psi -> 350psi
#2 - 300psi -> 540psi
#3 - 240psi -> 400psi
#4 - 330psi -> 600psi
#5 - 260psi -> 280psi

My interpretation for this would be:

#1 really bad rings?
#2 OK
#3 bad rings?
#4 OK
#5 bad valves?

What do you think?

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'99 S420, 155k
'91 VW Vanagon GL, 150k
'85 VW Vanagon GL, 120k
'82 VW Westy, aircooled, 165k

my interpretation is you used too much oil in the second test...
John

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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!

Also if you are serious about diagnosing make sure you do each cylinder a few times to catch air leaks.

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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