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The Terminator
Terminator Talk
Do I need to do a Head Cooling Mod?
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<blockquote data-quote="SlowSVT" data-source="post: 15722304" data-attributes="member: 20202"><p>I don't see too many examples of valve seats falling out but it does happen and when it does the motor will make an awful racket and will do a lot more damage if the owner keeps running the engine. The "tick" occurs when the exhaust valve guides being exposed in the port with no boss cast around them like most engines which will wick away heat and are directly exposed to the exhaust blast overheating the guides which will glow red hot when subjected to extended high engine output. That softens the metal causing then to wear the guides and in a hurry. The valves will start rocking in the guides hammering out the seats. I've seen examples of the mod motors valves rocking excessively in the head after the owner did something foolish, wear that should take eons can occur within seconds. People have actually driven their cars for quite some distance with an engine that has the tick something you can't do after you drop a valve seat which can be catastrophic if you keep running the engine.</p></blockquote><p></p>
[QUOTE="SlowSVT, post: 15722304, member: 20202"] I don't see too many examples of valve seats falling out but it does happen and when it does the motor will make an awful racket and will do a lot more damage if the owner keeps running the engine. The "tick" occurs when the exhaust valve guides being exposed in the port with no boss cast around them like most engines which will wick away heat and are directly exposed to the exhaust blast overheating the guides which will glow red hot when subjected to extended high engine output. That softens the metal causing then to wear the guides and in a hurry. The valves will start rocking in the guides hammering out the seats. I've seen examples of the mod motors valves rocking excessively in the head after the owner did something foolish, wear that should take eons can occur within seconds. People have actually driven their cars for quite some distance with an engine that has the tick something you can't do after you drop a valve seat which can be catastrophic if you keep running the engine. [/QUOTE]
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Terminator Talk
Do I need to do a Head Cooling Mod?
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