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oversized piston rings maybe?
Topic Started: Feb 21 2012, 07:31 PM (751 Views)
tynie
Fresh Fish
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hello i have a 91 metro 3l with 160k or 260k and i have rebuilt the head and found alot of scoring on the #2 cylinder wall , so i pulled the pistons and honed it not a lot but enough to git rid of the most the scoring now im getting a lot of blow by out of cylinder 2. i tried everything to get the oil ring to seat drive it long . hard , drive it easy ,marvel mystery oil in the cylinder and sat over night the next day all the mmo drained through into the oil pan. now i took it apart AGAIN easy and fun to do now im curious if i honed too much out and it seems like there is alot of piston slap in comparison to cyl 1 and 3. I busted my calipers out too so you guys dont have to wounder about measurements it seems that the cylinder is 0.010 larger then the book says and the piston is 0.007 larger then the book. now do i need bigger rings or should the OEM be fine or did i not wait for the oil ring to seat properly ? cuz i dont want to take her apart AGAIN. :smackface :smackface :smackface :smackface :smackface
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Johnny Mullet
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Fear the Mullet

If it's that far out of spec, then you need to bore all 3 and get oversized pistons and rings.
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clarkdw


Johnny Mullet
Feb 21 2012, 08:50 PM
If it's that far out of spec, then you need to bore all 3 and get oversized pistons and rings.
:gp

In all likelihood it is now neither round nor straight. The rings, std or oversize will never seal up.
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allmountain40
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:gp I agree with both JM and ClarkDW. You are most likely out of round and will need to have it bored and oversize pistons. :thumb
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