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need new valve shims, not sure what size

  • Thread starter Thread starter 86gs450
  • Start date Start date
8

86gs450

Guest
Hello gs gurus, I am working on a gs450, tried to fire it up this last weekend, no go, so I started with the usual, spark, fuel, etc. Opened up the top to check timing and valves, timing is spot on, exhaust valves are spot on, intake are another story, the right side is at .016 and the left is .018. Need to be .001-.003 according to what I've read. The shims are both 2.60 and I need to know what shims to get to make the clearances correct. Any help would be great. Thanks ahead of time.
 
You did not state your units of measure, but it appears that you are using INCHES.

Each shim size will change your clearance by about 0.002", so it appears that you will need to change 8 and 9 shim sizes. :eek:
The problem is, that will put you out at the maximum size shims. Either there is a problem with your measurement or a problem with the valves themselves, because that situation is virtually unheard of. :-k

Read the invitation in my sig.

.
 
What Steve says is true, are you sure you didn't get the mm/inches confused? Sounds like the intake numbers may be mm? I would think the engine would be able to start if you had those clearances in inches, but the intakes would be noisy. Ray
 
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