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Are 2F and 3F interchangeable?
Posted: Tue Oct 07, 2008 2:17 pm
by stockhorse
I have a 1985 62 series running a 3F. It has just developed a knock low down at the front of the motor and I suspect it has run a bearing.Crank shaft regrind $200 new main bearings (first undersize) $370 new big end bearings (first undersize)$300. Bearings are ex Japan and will take 3-4 weeks.
I can get a good 2F for $350. Will it just bolt straight up in place of the 3F?
Thanks for any advice.
Re: Are 2F and 3F interchangeable?
Posted: Sat Oct 11, 2008 5:30 pm
by bad_religion_au
stockhorse wrote:I have a 1985 62 series running a 3F. It has just developed a knock low down at the front of the motor and I suspect it has run a bearing.Crank shaft regrind $200 new main bearings (first undersize) $370 new big end bearings (first undersize)$300. Bearings are ex Japan and will take 3-4 weeks.
I can get a good 2F for $350. Will it just bolt straight up in place of the 3F?
Thanks for any advice.
might have to do some modification with the exaust.
i don't know about 3f's but that knock sounds like a common 2f problem. something to do with play in the timing/distributer/ oil pump gears...
Posted: Sat Oct 11, 2008 6:47 pm
by stockhorse
Thanks for the reply, the knock sounds like it is coming from just behind the harmonic balancer.I am wondering if it may be a worn cam thrust plate.
Posted: Sun Oct 12, 2008 12:58 am
by TWISTY
Where abouts are you located? I will have a good 3f up for sale shortly.
Posted: Sun Oct 12, 2008 1:39 am
by stockhorse
I am at Brisbane (south side)