engine assembly 911 - add sealer to head gasket?

overdraft

overdraft

Coast to Coast
hi all! trying to put my CB350 together... do i use gasket goo as well as my shiny new head gasket? my manual seems to say so, but frankly i've found it to be pretty crappy and the honda on that you find online doesnt say anything... also the manual seems to want gasket goo on the base... so as well as the base gasket and Orings. that seems wrong too... HELP!!!

thanks!
 
I used high heat copper gasket sealer on all my gaskets. You're going to get a different answer depending on who you ask, and each person is going to be sure that their answer is correct. I ended up going with my grandfather's advice (he has been rebuilding vintage cars and trucks for 55 years). Just use it conservatively, you don't want to block an oil passage.
Andrew
 
I used the red spray gasket adhesive on my gaskets, except the base and head.

On the base gasket mine was specifically made to not be used with adhesive, so I didn't. For my head gasket, advice was to use Threebond 1194 (same as used to seal the cases together, rocker cover, and other metal on metal seams) around critical areas. This meant around the dowels, around the cam chain opening and on a couple areas where there wasn't much gasket material between the cylinders and outside world.

The red spray adhesive (can't remember the brand) will apparently make it easier to remove and reinstall parts with paper gaskets. I used it on every single one.
 
Gaskets do not need any sort of goo on them. Two exceptions: Copper head gaskets and side cover gaskets on race bikes where the cover will come off frequently. In the latter case, it's grease on one side and thin layer of permatex on the other side.
 
overdraft said:
even the simple paper ones like, say the cam chain tensioner?
Click to expand...

No, only the top end gaskets got sealer. Maybe not necessary, but at the same time I couldn't see what trouble it could cause. No leaks or trouble so far. My mating surfaces were not perfect after scraping off the 44 year old burnt on asbestos gaskets. I spent two days with a razor removing everything.
 
hey guys... thanks for chiming in... very helpful! but maybe irrelevant... there's a giant ( ok like 20 thou) gap between the head and the cylinders... it's as if the metal part of the gasket was too thick compared to the paper part... is it a bad gasket?
 
nevermind... the issue is the steel sleeves are sticking up above the top of the cast part of the cylinders... I guess the guys who bored it must have dislodged them? I guess I need new cylinders. rebore somewhere else. fml.
 
im assuming this cant be fixed, right?
6e2f269f.jpg
 
Take the jugs off and put them on some stands in the oven. Heat to 400°F and wait 30 minutes. With the jugs on stands, the sleeves should drop down into place.
 
crazy! ok, i'll give it a go... do i need to do anything to prevent them dropping too far or is there some mechanical limit?
 
oh, or could i put them in upside down rather than making stands? then the aluminum would slide down the steel?
 
That'll work so long as the surface is flat and level; not something you can always count on inside an oven.
 
well i'll be dipped in shit! it appears to be working! this is magic! i'll keep you posted... i went with propping up the casting... one of the sleeves is down, the other is still a few thou proud of the casting... im going to leave it a bit longer and see if it goes the rest of the way without further intervention... update soon!
 
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