Topic: 836 head gasket exhaust leak and loose head bolts after rebuild

[MRieck]

Did you lube the cylinder stud threads? Make sure the oil drain back dowels aren't to long not allowing the cylinder head to pull down enough. Also ...you asked me about CR carb manifolds for the F2. If memory serves correct you need the DOHC manifolds which probably accounts for the 220.00 figure you said for the right pieces. That is unless you find an old set of CR SOHC manifolds which where to big for the K (they did work with big cursing). They were long also.

Mike are you refering to the dowels between the case and cylinder or the dowels between the cylinder and head?

Those pieces.

[brandEn]

Thanks

[brandEn]

Soooo.... my dowels were about 1mm longer than they needed to be. Thanks Mike I owe ya a cold one.

[wookie]

Not meaning to hijack your thread but since we are on the issue of 836 and head gaskets...  I have noticed a very light weep on the left side of mine.  Is the general consensus that this could get larger and blow or remain an annoying leak like the 400f.  I will tear it down in the winter, just hoping to run it this season...  thoughts?

JJ

[MRieck]

Soooo.... my dowels were about 1mm longer than they needed to be. Thanks Mike I owe ya a cold one.

MCRider too...he said it first!

[brandEn]

Ooops your right! MCRider and Mike, the next round is on me! THANKS for the help!

[brandEn]

Not meaning to hijack your thread but since we are on the issue of 836 and head gaskets...  I have noticed a very light weep on the left side of mine.  Is the general consensus that this could get larger and blow or remain an annoying leak like the 400f.  I will tear it down in the winter, just hoping to run it this season...  thoughts?

JJ

I would order a new Cometic gasket, spend an afternoon and get er done. Wait.... do you have a frame kit installed or do you need to pull the whole motor? Maybe just retorque the head bolts.

[wookie]

Yeah.... no frame kit.  I have a feeling the head bolts are stretched, oe not replaced.  I can just imagine the can of worms if i try to do this on the quick, broken bolts etc.  I didn't build this motor but plan on building the next one.  Maybe a litre motor is in order;), for now i will borrow a tampon from the wife and monitor it closely.

[MCRider]

Ooops your right! MCRider and Mike, the next round is on me! THANKS for the help!

Not sure if I did or not, but thanks! and your welcome.     I need all the props I can get.

I just put my head on and am putting the rockers in now. Fingers crossed, its been a while since I've really done one and not just talked about it.

[brandEn]

I got the top end back together and she works as advertised. I took her out for the first ride yesterday and she purred like a kitten. Until today. Went for a short ride and she was gurgling and running bad and was pissing fuel out of the #3 air jet (CR29's). Limped home and tore the carbs off and dismanteld #3 and found a huge piece of lint/fuzz under the #3 float valve seat and it was a bit smaller than the size of a pea. Strange! It was a gray cotton like material with one small strand that resembled silver tinsel. Not like any of the shop rags I have used. Not sure how it got in there but it seems to be running fine again. Any ideas on this one guys?

[Doctor_D]

Not a clue. I used only new gas, with a fuel filter, with those carbs. Also, we effectively "flushed" the bowls by draining them to change mains something like 10 times.

Anyway, glad you got it sorted.  You should get it up here on the dyno so we can see what kind of numbers you're making.

[brandEn]

Strange I know. Its probably from my home made fuel cell hanging from the rafters! It was so big though it makes me think maybe it was left from the manfacturing process. Its hard to imagine that big piece of cloth getting through all those tiny holes.