Coolant issue
Thread Starter
Teching In
Joined: Aug 2021
Posts: 49
Likes: 8
From: Hardee county
Coolant issue Guys I have a 04 lm7 on my boat and I keep having a issue with it pushing coolant out the cap I’ve put 3 different caps on this thing am I missing something? The engine has arp bolts in the heads and I’ve never got it pass 230 degrees and I shut it down
Thread Starter
Teching In
Joined: Aug 2021
Posts: 49
Likes: 8
From: Hardee county
honestly I can not answer that truthfully I do fill like that it is because when the thermostat opens it cools down again however after I run it for about a 2 hours I gotta add 2 gallons of coolant the coolant constantly runs out of the over flow, today I added a expansion tank and have no more coolant leak I’m thinking that I need to cap off the pressure side at the heather core and fill threw my return
Is this in an airboat?? Why does it have its own, independent, dedicated coolant supply, when there's an entire lake underneath the boat? Maybe you're running in saltwater???
Thread Starter
Teching In
Joined: Aug 2021
Posts: 49
Likes: 8
From: Hardee county
Thread Starter
Teching In
Joined: Aug 2021
Posts: 49
Likes: 8
From: Hardee county
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TECH Senior Member
Joined: Jun 2016
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From: Central Cal.
We know WHAT they are, but don't always know the particulars of their operation, like occasionally running across land strips between water areas. Don't ASSUME we all know that stuff. Guys here want to help you. So help them by supplying obvious-to-you details. Many of us don't live in or near swamps or bayous. Actual boats often have simple suck-it-out-of-the-lake cooling systems.
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Thread Starter
Teching In
Joined: Aug 2021
Posts: 49
Likes: 8
From: Hardee county
We know WHAT they are, but don't always know the particulars of their operation, like occasionally running across land strips between water areas. Don't ASSUME we all know that stuff. Guys here want to help you. So help them by supplying obvious-to-you details. Many of us don't live in or near swamps or bayous. Actual boats often have simple suck-it-out-of-the-lake cooling systems.
ok I’m sorry I will explain it better I have a airboat where I run miles upon miles of dry ground during hunting season so the boat has to have its own coolant system so it does not overheat