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2.3 T5 Engine compression PSI

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Old Sep 22nd, 2015, 03:17   #11
V70R4me
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Wish I would have read this forum first... I watched a youtube video (Ericthecarguy) and he did not mention warming up the engine first so I did not do this.

With the engine cold and no oil squirted into the cylinders (Eric suggests a dry and a wet test) my T5 had the following numbers for the dry test/no oil squirt into the cylinders with the engine cold:
160 152 156 155 150

180 psi was mentioned in a prior post as ideal with the engine warm. Can anyone suggest how much I might expect my numbers to increase if the engine was warm?

This car has over 300,000 miles on it. Overall it is sound. I am trying to decide if I should spend money on it to do a complete timing belt kit and tune up - I figured a compression test was a good place to start.

Last edited by V70R4me; Sep 22nd, 2015 at 04:09.
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Old Sep 22nd, 2015, 17:28   #12
SteveSarre
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Hi V70R4me

I am in the same boat as you (I also did the last test when cold, 2.3 T5, much lower miles) and got similar results to you.

I will redo the test with a warm engine etc, and you should probably do the same. It is the cheap option!

Hopefully we'll both end up with more like the 180 that has been mentioned.

Steve
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Old Sep 22nd, 2015, 20:08   #13
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unplug the injectors or by the time you get to the last cylinder the fuel will wash the oil away and give a false low reading (bore wash).
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Old Sep 22nd, 2015, 21:06   #14
bournricha
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Default compression tests

I was given a 740 once and I spent a little time on it, until I tested the compression .Only 90, so it got weighed in .But got £175 from the yard so time not wasted !
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Old Sep 23rd, 2015, 14:35   #15
SteveSarre
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Hi KBB

Wouldn't it be even better to remove the fuel pump fuse?

Steve
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Old Sep 23rd, 2015, 14:58   #16
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Quote:
Originally Posted by SteveSarre View Post
Hi KBB

Wouldn't it be even better to remove the fuel pump fuse?

Steve
What ever is the easiest
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