[Fot] Head Clearance: Push Rods

[Richard Good]

Marty,

I just did a little grinding on an old TR6 head and took some photos to send to a customer with the same question yesterday.  The photos are attached.  You never know how much extra material will be hanging out from the casting joint and getting close to the push rod.  Usually it is not a problem with stock ratio rockers but with the higher ratio rockers the top of the push rod is leaning closer to the rocker shaft and closer to the head in this area.  The photo just shows the rear three but any of them could be interfering.  I always grind them all as shown when I am prepping a head.

Richard Good
  ----- Original Message ----- 
  From: marty via Fot 
  To: FOT 
  Sent: Friday, March 20, 2015 11:40 AM
  Subject: [Fot] Head Clearance: Push Rods


  I going to be assembling a new TR6 engine shortly using tubular push rods.  I remember having to clear the head openings due to the larger diameter of the tubular push rods but they are all running together and I don't remember if it was on TR4, Spitfire, or TR6.  If it was TR6 I'd rather go ahead and take care of it while the heads on the bench.  Anybody recall which head needs cleared and if it is indeed the TR6 what locations? Seemed like it was only in a couple of spots.
   
  Thanks,
   
  Marty



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