am I about to set off a bomb?


Kevin

How is the guage going to hold the pressure to let you read it?

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

I guess someone will have to crank the engine while someone reads the gauge. It really needs a check valve or something like that doesn't it?

Kevin

yes....thats exactly what it needs...becasue I am not sure you could get an accurate reading without it.

__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

Even if you could get a decent reading, the reading would not be correct due to the volume of the piping to the gauge. This increases the cylinder volume significantly. The only way to get a true reading is to have a check valve very close to the glow plug hole. Additionally, the inside diameter of the pipe should be small to cut down on the volume. You then must crank the engine through several cycles to compress the air in the pipes a little bit each cycle until the pressure in the pipes gets close enough to the pressure in the cylinder. After enough cycles, the gauge will stop increasing in value. That's fairly close to the actual cylinder compression.

I couldn't read the gauge too well, but you had better hope that its at least over 300psi. otherwise, BOOM!

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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350