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Super Contributor

Re: difference between a 0r3674 and 0r4886 head

The 0R4886 is a swirl head. The port under the intake valve is different. This is necessary for the 8PN engine.
Visitor

Re: difference between a 0r3674 and 0r4886 head

do you happen to know what is different of the two i know the casting is the same so maybe its the valves and springs.

Super Contributor

Re: difference between a 0r3674 and 0r4886 head

No, those 2 part numbers are not interchangeable. The 0R4886 is for 3406C truck engines with 8PN serial number prefix.
Visitor
Accepted Solution

difference between a 0r3674 and 0r4886 head

i have a 3674 head 110-5100 casting number and want to know if it can be used in place of a 4886 cyl head.