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Piston ring thicknesses - 3.9/4.2l
Posted: Fri Feb 01, 2008 7:27 am
by mk1storm
Can anyone tell me what the thicknesses are of the standard piston rings used in the 3.9/4.2l engines? ie 94.04mm bore???
Looking to use these with my omega 93.5mm pistons and adjust the gap accordingly but need to be sure the ring thicknesses are correct before i get them. My current ones are 2.0, 2.0, 4.0mm.
Posted: Fri Feb 01, 2008 11:12 am
by ian.stewart
Another dimension to check would be the width of the ring, Not the thickness, I have seen bores and pistons ruined by fitting rings that are too wide to fit the piston ring groove root dia, and do not give enough clearance when the engine warms up.
Posted: Fri Feb 01, 2008 11:54 am
by ian.stewart
Ive just had a call from Thurstons about Omega Rings, or should I say Rings to fit Omegas, Approx £250+VAT
Posted: Fri Feb 01, 2008 8:44 pm
by HairbearTE
That's a bit of a stripe Ian! Might as well get from the states. It's a joke how much some of our gear costs compared to chevy
Posted: Sat Feb 02, 2008 9:57 am
by Rossco
HairbearTE wrote:That's a bit of a stripe Ian! Might as well get from the states. It's a joke how much some of our gear costs compared to chevy
You could always go BBB........and get a 455
