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Puma22



Member Since: 22 Jun 2022
Location: North Yorkshire
Posts: 29

United Kingdom 
Compression Test 0psi
I have recently done a compression test, the third cylinder back (I think the order is 1,3,2,4, so cylinder 2?) was reading 0psi.

I will shortly be continuing on with my strip down, however I believe that an inlet valve may be stuck open. There is ‘smoke’ coming from the inlet when cranking for the test. Has anyone come across this before? I can’t find anything online relating to Puma engines and intake valve problems.
Post #957911 11th Jul 2022 2:59pm
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hank



Member Since: 12 Sep 2016
Location: South Wales
Posts: 2299

Wales 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Sorry to hear you've got no compression. Explains your crankcase pressure though > 110 XS Double Cab
Post #957915 11th Jul 2022 3:56pm
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Puma22



Member Since: 22 Jun 2022
Location: North Yorkshire
Posts: 29

United Kingdom 
Most certainly. I will continue on and hopeful when I find the cause I can put a post out to help others.
Post #957916 11th Jul 2022 4:00pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17372

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Re: Compression Test 0psi
Puma22 wrote:
I have recently done a compression test, the third cylinder back (I think the order is 1,3,2,4, so cylinder 2?) ...


I think you may be confusing firing order with position. Generally cylinders are numbered 1 to n (where n is the total number) from front to rear, so on a Puma no.2 cylinder is the one between 1 and 3, second from the front. The fact that it is the third cylinder to fire during a full, four stroke cycle, is irrelevant.
Post #957923 11th Jul 2022 5:01pm
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5698

2006 Defender 110 Td5 USW Zermatt Silver
Re: Compression Test 0psi
Puma22 wrote:
I have recently done a compression test, the third cylinder back (I think the order is 1,3,2,4, so cylinder 2?) was reading 0psi.

I will shortly be continuing on with my strip down, however I believe that an inlet valve may be stuck open. There is ‘smoke’ coming from the inlet when cranking for the test. Has anyone come across this before? I can’t find anything online relating to Puma engines and intake valve problems.


The third cylinder back is cylinder three. The 1324 is the firing order not the cylinder order.
Post #957995 12th Jul 2022 8:55am
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