It depends on the tester and the adapter you are using. They have adapters for either the glow plug or injector holes. You dont want the engine to start so you have to have the fuel shut off by holding down the stop leaver while cranking. You usually use a remote start switch for this or have someone crank from inside car while you are holding the leaver and checking the readings on the guage.

On 3/4/2011 12:00 PM, R A Bennell wrote:
The thread on the tick suggested compression testing and that got me to wondering about doing one.

Anyone have good advice on testing an old 300D 115 normally aspirated engine?

Am I correct that one must remove the injectors and use those holes for the tester?

What happens with the diesel fuel that should then be shooting out all over at high pressure when one is testing? How does one stop that?

I bought a compression tester a couple of years back but it is sitting in the tool box and has yet to be used.

Randy

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