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Old 08-28-2008, 11:14 AM   #1
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Default Engine head torque

Does anyone remember what torque should be applied to the screws when replace the head of an RC engine?

Thanks in advance
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Old 08-28-2008, 11:51 AM   #2
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I didnt know there was a spec, just always thought that if they turned they were too loose..

I just screw 'em down tight!
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Old 08-28-2008, 12:19 PM   #3
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That's the way we all do it, but if you tight the head too much then it may not work properly.

Thought about buying a torque screwdriver but need the right range of torque.
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Old 08-28-2008, 02:37 PM   #4
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Just tighten them with normal strength. Don't overtighten it. Especially not the tiny screws in the cylinder head.
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Old 08-28-2008, 06:13 PM   #5
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main key to proper head torquing is to tighten the head bolts in an x pattern equally . with engine sitting head up hold on to the head and the block , situate the head so it is centered up in the rotation (it will turn about an 1/8th of an inch in the loose bolts ), while pushing down on the head so it is sitting nice and flat against the head button tighten all the head bolts until they are all just touching the seat for the bolt in the head . begin tightening bolts in an x pattern 1/8th of a turn at a time or so , should take you about 3 times around to get the bolts torqued properly (maybe 20 inch/lbs. but dont quote me on that , LOL). do not overtighten as it will warp the block !!!!!! if you have to strain at all to tighten or loosen your head bolts , that is way too tight !!!!!
hope this helps ,
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Old 08-28-2008, 09:33 PM   #6
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Good advice from Houston.


I also use German specs---Guud-an-tite
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Old 08-28-2008, 11:25 PM   #7
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Quote:
Originally Posted by air8 View Post
Good advice from Houston.


I also use German specs---Guud-an-tite

Like said above, there are no real specs. Just get them tight, but dont strain yourself by any means, just tighten them all equally in an x ( cross) pattern.
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Old 08-29-2008, 04:24 PM   #8
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warped block is a bad thing !!
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Old 08-29-2008, 08:45 PM   #9
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I actually have a torque screwdriver from work & set to 15 in/lb feels good,dont know if thats right but its what I've been using.That feels like get them medium snug(finger tight/restience felt) then about 1/4 turn,so pretty much what everyone else said. Important thing is dont use a cheater on the wrench,if your hand cant grip the allen driver tight enough then you've already tightened the screw too tight.
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