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andrew j

New Member

• Jan 6, 2009

• #1

could any one be able to tell me what the piston compression rate should be for a 4.0 rr cuz the way its going ill give it 50 tons with the digger in work!!!!!!!!! i know one of you kind caring rr owners will know ,

 

clutchdust

Well-Known Member

• Jan 7, 2009

• #2

I take it you mean the compression ratio?

Look where the dipstick tube goes into the engine. You'll see the engine number, near that will be the compression ratio. Should be summat like 9.25:1

As for compression pressures if you're doing a compression test then summat like 130 psi on all cylinders would be about normal.

 

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andrew j

New Member

• Jan 8, 2009

• #3

thank you c d