I plan on doing a compression test on my '82 240D. I plan on warming up the car then removing all four fuel injectors and then testing each cylinder. My question is how do I keep fuel from coming out of the injectors once they are removed?

Thanks,

Scott

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Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)

When you disconnect the fuel lines from your injectors inorder to remove them just leave the line hang. When you do the test you will get some fuel from the end of the line but it won't be enough to worry about. You are only going to spin the engine a few times.

Remember that if you get a low compression reading from a cyl. squirt a bit of motor oil in the cyl. Test again. If the numbers come up this time then you have worn rings. If the numbers don't improve then you probably have bad valves in that cyl.

Or you can try pressing the "stop" lever as someone else turns over the engine - unless you have a remote starter- then you could turn it over yourself. The "stop" lever should stop fuel from flowing out of the injector pump. I just did a compression test on my 82 240D using the method recommended in the previous post and a fair amount of fuel does spray out, but nothing that a rag can't absorb. The "stop" lever is probably the neatest way of doing it. Good luck and hope you have high and consistent readings.

I remove the hard injector lines so its easy to get the GPs out then cover the IP with a clean rag and crank it over, wont make too big a mess that way.

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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"

Thanks for all the good ideas. I just bought the car with a broken odometer and am curious as to how the engine tests out.

Scott

__________________
Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)