nitroholic

Do they make a small torque wrench to be sure they're all the same? What do you do/or think? I mean do you just really torque em and guess like me.There must be something to be sure they're all to specs.

kaiser01

you could get an tq wrench in inch pounds but the problem is when the screw is screwed into plastic. plastic changes everytime you put a screw in.
so the tq you may want the screw at will require more tq to thread it in. make sense?

tq wrenches are really for metal to metal. mot metal to plastic.

DaveG55

Ummmm, head screws are metal to metal...
At least all of my engines use metal screws and some form of metal crankcase.

I've always done mine freehand and never had an issue. It's not all that hard to get them close and I really doubt that r/c engines are all that critical on head torque.

kaiser01

lol, the way i thought i read it was he was talking about torx head screws.

**face palm**

in inch ounce tq wrench would work fine then, but not really needed.

tommygun32

I find that a good rule of thumb is 'wrist tight'. If it's too loose, it will back out eventually and then you'll learn that the last 'wrist tight' wasn't quite tight enough. Just make sure to check all the screws every once in a while

It's much more difficult dealing with a stripped or locked/frozen screw than it is to deal with one that's backing out.

Good luck.

nitroholic

Yeah i figured that's what you thought i ment,but i think it's like dave wrote,just by hand and guess cause as he wrote it's true one cylinder,really isn't needed to be super tolerant.Just figured i'd see what others thought.Thanks guys.

Pathous

My Feedback: (12)

http://www.darrolcady.com/Accessorie...ries_tools.htm Scroll down a little some of the very serious airplane racers use this to torque their head bolts and glow plug

proanti1

My Feedback: (2)

Wrist tight, as with everything on an rc car. No need for a torque wrench... unless you really want one.

DaveG55

If I ever get serious enough to feel the need to spend $150 on a tool to tighten fasteners that the engine makers don't even publish specs on, well, then I quit questioning my sanity and know for a fact I've gone over the edge...

proanti1

My Feedback: (2)

Well... I can understand it for machined heads, and custom made parts. Those boat guys seriously mod their motors. But not a car motor.

378

My Feedback: (4)

Head bolt torque isn't even that critical on car engines. The spec for the one in mine has a 10ft-lb variance, just for example.



What I do on my glow engines is I turn them all down until they bottom, then in a criss-cross pattern, I tighten them until the wrench twists about 45 degrees. They don't come out unless I want them to.

nitroholic

Yeah 378,that's pretty much the way i do it also.Yeah the hobby is expensive enough to go buying special tools,it aint like i'm going over seas and racing on a profesional level.