[TR] GT6 problems

[Jim Muller]

On Friday I started to drive the GT6 to work but it became obvious 
after a few minutes that it wasn't happy reving.  It idled nicely but 
didn't want to go above maybe 3000rpm, would start missing and had 
nowhere near as much torque as it should.  I thought it might be a 
stuck carb pot (it has two SUs), which had happened to be me before.  
But that should have caused a rich mixture as the revs went up, and 
it wasn't acting like a rich mixture.  In any case, I check them and 
they were fine.  Another possibility was condensation in the dizzy, 
seeing as how it  has been raining here for weeks.  But it should 
have dried out in the ten minutes I drove it.

So this evening, finally, I had a few minutes so I check the 
compression.  It's been sounding noisier like it had more valve lash 
even though I adjusted them not long ago.  The readings were 120, 
150, 150, 135, 150 150.  I rechecked #1 and it read only 115 the 
second time.  Not so good.  And at idle something was going thunk 
thunk thunk.  (On a previous car that sound was a rod bearing, but 
that wouldn't affect compression.)  Maybe a valve on #1 is sticky.  
The best possibility is that an adjustment locking nut has come loose 
and its valve has loosened up.  

Oh well, something else to check.  No time now though.  The GT6 won't 
be going anywhere for a while.

Bummer.

Jim Muller
jimmuller at rcn.com