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Member Since: 17 May 2021
Location: Sussex
Posts: 1

United Kingdom 2011 Defender 110 Puma 2.4 SW Zermatt Silver
V8 Compression Test
I have acquired a 1992 Rover V8 3.5 engine s/n 24G10456B. It came out of a fire truck so has not had a lot of use. I have performed a compression test on the cold engine and six of the cylinders were good at 120 psi (it’s 8.13 to 1), however cylinders five and six are 105 and 100 psi. I squirted some oil into the cylinders and now cylinder five is 120 psi and six is 110 psi.

My question is should I replace the piston rings in those two lowest cylinders that are 100 and 105 psi cold, or can I expect them to be OK when engine is warm?
Post #972120 23rd Nov 2022 11:47am
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