Motor Question
- Thread starter BigRed460
- Start date
bigike
Full Access Member
Short term fix, go to a heavier oil.
This will fill your engines new found bearing clearance issues.
IT WORKS!
are you sill running 5-20?
This will fill your engines new found bearing clearance issues.
IT WORKS!
are you sill running 5-20?
bigike
Full Access Member
O well. 0-20 is stock. Whats the word on running 20w-50 in these things.
and have you tried to go back to a 0-20? Maybe something is wrong with the oil pump. wore out spring, bad gears, too much clearance.
and have you tried to go back to a 0-20? Maybe something is wrong with the oil pump. wore out spring, bad gears, too much clearance.
walenator
Full Access Member
My 04 calls for 10w30 which should be heavier when hot then the 0w40. Might be just the ticket.
Some are going to 15w50...but the blow-by and bearing issue is becoming something that is going to need some research...the space between the piston domes and the first ring is very small. When the piston gets hot it is the dome that gets the most heat...it expands and contracts with temperature variation and that very narrow space (dome depth) is a real problem...the dome simply does not have sufficient material to absorb the heat and the rings start expanding and contracting with the heat transferred from the dome. Take a look at the stock pistons...there is precious little dome material...look at after market pistons and you will see a much thicker dome and a longer skirt distance before you get to the initial ring.
We will see lots of blow by issues that can use heavier oil as a short term solution, but eventually, most of us will have to go to forged pistons (and rods since we are there) to alleviate the problem.
We will see lots of blow by issues that can use heavier oil as a short term solution, but eventually, most of us will have to go to forged pistons (and rods since we are there) to alleviate the problem.
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