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diesel compresion tester

General Tech Talk

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diesel compresion tester

Post by MUD CLUB »

has anyone used the ones off ebay ($69+freight) are they worth it
Not looking at everyday use just for everynow and then to check the old girl
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Post by bimbo »

i've bought one but never used it. all i can comment on is that it looks to be reasonably made - not really cheap lookin. I would imagine otheres on here will be able to provide better feedback
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Post by Mark2 »

I have an ebay one - it cost a bit more than that and seems well enough made.


Never compared it with another gauge but it may read high - results for my TD42 with lots of km were all above factory specs????

Unless I'm doing it wrong - I presume you're supposed crank it until the reading peaks and then stop cranking, similar to testing a petrol engine???
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Post by xxxhilux »

Mark2 wrote:I have an ebay one - it cost a bit more than that and seems well enough made.


Never compared it with another gauge but it may read high - results for my TD42 with lots of km were all above factory specs????

Unless I'm doing it wrong - I presume you're supposed crank it until the reading peaks and then stop cranking, similar to testing a petrol engine???
yea thats right the only differance for petrol is you have to have the throtle fully open to get a correct reading for diesel it dosent matter
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Post by shorty_f0rty »

i thought the diesel needs throttle wide open when doing a compression test..
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Post by RV80 »

With a diesel the engine only needs to do about 5 full revolutions. And disconnect the power from the injector pump.
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Post by xxxhilux »

shorty_f0rty wrote:i thought the diesel needs throttle wide open when doing a compression test..
na diesels dont have a differnt set up and air can get in with the throttle closed where a petrol cant get air threw
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