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Half of engine dead

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Old 12-11-2008, 01:46 PM
  #31  
Garth S
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Originally Posted by Tom Rathjen
Well, crap. It is the round tooth one. Darnit.
A HTD ( round tooth) TB will only engage ~60 deg of arc on a square tooth cog before lift-off ..... wheras a square tooth TB engages the full circle of the matching cog.

Odds are your cogs are square tooth.
Old 12-11-2008, 05:13 PM
  #32  
Tom Rathjen
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They are. I also looked at the belt I originally removed. Square tooth. Evidence is pretty strong.

I stayed up late last night and got the round one out. Getting the right one now. Grrrr.

PS--thank you so much for posting the pictures of the three belt types. That was very very helpful in being absolutely sure I knew what I was looking at.
Old 12-11-2008, 06:15 PM
  #33  
Mrmerlin
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Top Tommy, since you doing this job over why not replace all of the pulleys with updated parts chances are the oil pump pulley is aluminum and has a new metal replacement and i would bet that the crank drive gear is probably worn as well as the cam pulleys
You might even get lucky with some used parts from 928 International 1/2 price used will work here
If you do replace the parts remove the 1mm spacer behind the old aluminum oil pump gear when fitting a new steel gear



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