Berlingo Compression Test Spec\Procedure

[shtu]

Regular readers might remember my fun with injectors a few weeks back - viewtopic.php?t=80488

Well, in the words of the great Roy Walker - it's good, but it's not right.

Still gives the occasional miss on idle, and still not briilliant at low rpm or light throttle. It's vastly improved, but not quite there. As a diagnostic step only, I fitted an EGR blank, which if anything made matters slightly worse.

Before I go much further, I think it's time to do a check of the basic engine health - it's possible the previous owner ignored the faulty injector for an extended time (I'm pretty sure they did), so there's a risk I've got a burned piston or valve, just enough to drop the compression a bit, and make that one cylinder a bit weak.

So - compression test.

I've already got a diesel-suitable tester, and luckily the expensive Laser Tools glowplug adapter can be made to fit my existing set, so I'm all good on that front.

Could somebody look up for me,

1 - The comprtession test procedure in The Book, especially how to disable the injection system to allow testing.
2 - The book spec for the engine's compression.

It'll then hopefully take a couple of hours to test that, and I know for sure if I have a decent engine or not.

ViIN = VF7**************[VIN obfuscated, can be read by forum staff]

Thanks in advance.

[GiveMeABreak]

Link:

Berlingo B9 Pressure Check: Engine End of Compression

[shtu]

I finally got around to doing the tests, which to me look healthy enough. The tester is *supposed* to hold the peak pressure, but a small leak in the setup somewhere meant it was droppnig back slowly, so some of the variation is the time it took me to move from cranking the engine, to taking a reading off the gauge.

(tables, this tool did an OKish job converting my spreadsheet into BBcode. https://bhep.pktsoftware.com/any_table_ ... hp?lang=en )

cylinder	psi	average psi	average bar
1	360	365.00	25.17
1	365		-
1	370		-
2	370	367.50	25.34
2	365		-
3	390	390.00	26.89
3	390		-
4	370	376.67	25.97
4	380		-
4	380		-

Off to play with injectors again - cylinder 2 is showing an idle correction almost 50% higher than the other 3. This makes me suspect it's sticky\partially blocked, as occasionally the calculated overall amount injected across all 4 goes up a LOT, and a cylinder misses. My guess is that every so often that injector unsticks, and dumps in too much fuel.

[Photomike65]

Hi it says I'm not authorised to read this forum when I click on the link to the procedure, can someone please send me a link?

[mickthemaverick]

Hi Photomike, the reason you are not allowed to view that procedure is simply that it is in the member's area with access only for donating members. If you click on the Donations tab top left of the page you will be able to do so and gain access.