[TR] TR3A w/4A motor & aluminum head

[wbeech]

Happy Monday List,

 

Have had a problem with some water up in the rocker area of the TR3(TR4A
Motor) ever since I bought it last year.  Just now getting to a point where
I can pull the head and see if I can see what the issue is.  Below are my
observations:

1. Did not know it was an aluminum head until today, re-torqued it last year
when I first saw this problem at 95lbs.  Learned today it should be 70lbs.

2. Runs great, compression checks out good at 150-55 across all.  But after
getting up to highway speeds then coming back to town it quickly overheats
and blows the water past the rad cap.

3. Cannot see any damage to the solid copper head gasket.  Is this the right
type gasket for an aluminum head?

4. Cannot see any damage to the head, how do you check an aluminum head?  I
would think that magnaflux would not work here.

5. Drained and checked the oil last fall, no water present in the case.

 

Any suggestions from the collective wisdom would be greatly appreciated,
seems this motor was intended for some level of performance as it also has
Moss's roller rockers. 

 

Many thanks to all,

 

Bill B

TS30800L

 

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