Cavatation, Why??
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Elder User
Joined: Mar 2004
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Cavatation, Why??
can any one explain to me why cavatation is only a problem in diesels, and not gas.. I understand what it is, but why dose it only happens to diesel's. . Just trying to broaden my knowledge base,J.
Post Fiend
Joined: Nov 2003
Posts: 21,285
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From: Nutter Fort, WV
No gasoline motor that I am aware of can stand 22.5 to 1 compression and add 15 pounds of turbo boost on top of that.
But diesels have that or more.
The main reason is the compression pressures and the combustion pressures cause vibration in the cylinder walls.
This vibration is what causes the air bubbles to form.
The 7.3 block basicly is a bored 6.9 block which makes the walls thinner, this causes the vibration to be stronger and the corossion has less distance to eat through.
"Most" diesel motor manufacturers either require an addative or antifreeze that already has the addative properties in it.
But diesels have that or more.
The main reason is the compression pressures and the combustion pressures cause vibration in the cylinder walls.
This vibration is what causes the air bubbles to form.
The 7.3 block basicly is a bored 6.9 block which makes the walls thinner, this causes the vibration to be stronger and the corossion has less distance to eat through.
"Most" diesel motor manufacturers either require an addative or antifreeze that already has the addative properties in it.
Posting Guru
Joined: Oct 2003
Posts: 2,438
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From: Monroe, WA
Cavitation has been a problem with the big diesels as well. Cummins tried a low flow cooling system years ago on the big rigs to try and keep air bubbles to a minimum. They used small hoses like heater hoses to run the coolant to and from the radiator. It must not have helped much, I don't see them much any more.
