Quote:
Originally Posted by Tom '74 911
I've decided to use Threebond 1211 on my #8 nose bearing during assembly and wanted to verify where to put it exactly - on both halves @ the case bearing web all around? Is it better to try NOT to get it on the o-ring or OK to get it on the o-ring? Is it OK if it get's in/near the oil supply hole in the case & in the bearing itself? Super thin coat so as not to mess w/tolerances as much as possible...?
Just want to be clear so I have the best chance for success.
Also, I'm assuming that doing this slightly amends the assembly procedure and timing as the crank has to be OUT of the case in order to apply the 1211 in the nose bearing area, THEN the crank goes in the case, THEN you apply the perimeter & main bearing web sealant, THEN you mate the case halves... All of which adds an extra step or 2 during the scramble to mate the case halves before the sealant goes off - is that correct?
Thanks so much,
Tom
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Tom, I have only done a couple engines, but they are not leaking.. yet.. and I used 1211, 1104 and 574.
I put the 574 on the main bearing web surfaces first since it wont go off until absence of O2... then I applied a very thin coating of 1211 to the nose bearing itself all around(bearing is on the crank, but not in the case), being careful not to get it on the o-ring.. if a tiny bit gets on, it shouldnt matter. Then I quickly get the 1104 on the perimeter, then crank goes in, and it all gets buttoned up.
Pretty sure that is the process you had outlined above. To speed it up, I put my through bolts all in and torqued down, without putting the o-rings on.. then went back one at a time, and removed each through bolt and put the o-ring on. All this did was save a bit of time in getting the case torqued down. I am sure that the pros don't need to do this step and work a lot faster than I.