f2cafe racer

[yozzer74]

Thanks good to meet you .probably take you up on offer of carb sync .Cheers

[yozzer74]

Hi I've ordered all the missing parts that I need for my engine rebuild .been reading a lot of threads about rebuilds and how to prevent oil leaks .Thanks to byto and Pete on here .but one thing I'm not sure about is the four notch pins between the head & barrels .do I have to file them down because I've had the head skimmed .I've read people have had leaks .when they have had head and barrels skimmed .and not filed them down .Any ideas

[Bryanj]

Assemble dry and check the "gap" with feelers the see how thick the gasket is, unless a lot was skimmed off you should be OK

[yozzer74]

He did say he had skimmed a lot off it .I will do that thanks

[UK Pete]

Yes as bryan says do it dry and measure, i would personally make them slightly undersize to avoid any problem
pete

[yozzer74]

Will do .Just had  my parts delivered from David silver's and there's one o ring missing not happy.

[yozzer74]

Well I've checked the clearance and the gap was quite big so I've filed them down so there flush with the barrels .What is the purpose of these anyway.are they just to keep the rubber seals in place .if that's the case I'm sure it will be ok .being flush .

[K2-K6]

Engineering dowells to position the head correctly on the barrels, likewise the barells to the crankcase has some more so the whole assembly aligns. The cam would also be parallel to the crank too. You may need to get some more if they don't locate the two components.

[yozzer74]

The ones that position the head to the barrels are ok like wise the two that locate the barrels to the crank cases .these don't locate anything only the rubber seals as far as I can see

[K2-K6]

I had to get out my manual to see what they do so sorry if my last post was a bit off and may have been talking at cross purposes with you.

Going from the outer most studs,  the two front ones have the location dowells for head position,  then the next pair of studs in clamping at back and front of Cylinders 1&4 have the sleeves you are talking about? 

Honda manual describes these as "head gasket dowells" from which I get they are principally giving accurate location to get the fire rings centered over the bores,  think there is more tolerance around other stuff like oil ways.

[yozzer74]

I've been reading some were that Honda fitted these help with stop head gasket leaks .

[K2-K6]

Interestingly as ukpete says somewhere else they deleted 4 of them on the F2 as compared to it's direct stablemate the K7 and all the previous Ks.

The oil running back down the studs is not really pressured,  some people seem to have better succes at building them without leaks than others and you also get into the debate of using sealant or not and which type.

[yozzer74]

Hi will this sealer be ok for for the rubber pucks .and another little set back .the main location notch pins I have for the head to barrels are the wrong size I've measured them at 19mm should be 18mm .they have seen better days too .

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[yozzer74]

Location pins sorted thanks r1pete for turning me them up on lathe .he also has a very nice E type jag worth the visit  just to see that .

[yozzer74]

Got some work done on engine today pistons back on rings fitted head & barrels on . [ Guests cannot view attachments ] [ Guests cannot view attachments ] [ Guests cannot view attachments ] [ Guests cannot view attachments ] [ Guests cannot view attachments ]