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Old 06-20-2013, 06:54 AM   #1
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Default Engine air leak??

Hi all, new to the forum and new to nitro.
So due to my newbie status i need some help, when I start my motor
It revs out to max throttle and also it seems to be spitting fuel out around
The bottom of the heat sink! Any help???
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Old 06-20-2013, 12:05 PM   #2
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Anybody got advice
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Old 06-20-2013, 01:13 PM   #3
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If fuel is comming from under the head you have to check the headsrews fist.
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Old 06-21-2013, 03:33 AM   #4
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Right, so just tighten them up then
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Old 06-21-2013, 11:15 AM   #5
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In small steps in a crossed movement so the head will bet tighten as straight as possible
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Old 06-21-2013, 12:34 PM   #6
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Quote:
Originally Posted by Beano-rc View Post
when I start my motor
It revs out to max throttle and also it seems to be spitting fuel out around
The bottom of the heat sink! Any help???
Tightening the head bolts may fix your problem, But I you may be forgetting about what caused your problem?

A leaking head gasket is a symptom of a problem. The problem may be minor, or possibly serious if it isn't fixed.
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Old 06-22-2013, 06:38 AM   #7
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Thanks for advice guys, will try tighten it up a little and see how it goes.
Will this be the cause of it revving out of control?
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Old 06-22-2013, 08:04 AM   #8
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If fuel is flowing away frome there then the screws must be really loose!
And yes, air can come in giving high revs.
When tightening, do not use extreme force.
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Old 06-24-2013, 11:52 AM   #9
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Quote:
Originally Posted by wmazz View Post
Tightening the head bolts may fix your problem, But I you may be forgetting about what caused your problem?

A leaking head gasket is a symptom of a problem. The problem may be minor, or possibly serious if it isn't fixed.
A leaking head gasket is a symptom of detonation. Most head gasket leaks are caused by detonation.
Your detonation problem may be caused by your carb settings set to lean. Possibly your glow plug and
carb settings. What glow plug are you using?

Quote:
Originally Posted by Beano-rc View Post
Thanks for advice guys, will try tighten it up a little and see how it goes.
Will this be the cause of it revving out of control?
Revving out of control is caused by pre-ignition. Pre-ignition occurs after the engine has been detonating
for some period of time.

I recommend that you "anneal" your gaskets before you reuse them. Annealing expands the copper, so
that it can be reused. To anneal a gasket, heat up your gaskets one at a time, and drop them into cold
water.

If you need more help with setting up your car to be a reliable source of fun, add more details to this
thread, and others will assist you. The more details, the better.
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