V10 Overheating
Cross-Country
Joined: Feb 2026
Posts: 53
Likes: 23
Actually just getting started. Removed the overflow tank and drained the radiator. Something I remembered was that as soon as I added / topped off the reservoir the overheating happened. Is it possible that the cap on the reservoir not fitting tight enough could cause the problem?
FTE Leadership Emeritus
Joined: Sep 2003
Posts: 12,253
Likes: 763
From: Houston, Texas
Originally Posted by Freedom-over-safety
No, the only thing that would happen if the cap isn’t sealing well is you’d get coolant coming out when it gets hot. How hot did it actually get? Do you datalog while you’re towing or just use the gauges?
Cross-Country
Joined: Feb 2026
Posts: 53
Likes: 23
yeah that’s normal when it gets too hot, too much pressure will force coolant past the cap.
Lead Driver
Joined: Jun 2006
Posts: 5,680
Likes: 1,000
From: Near Yosemite CA
I would start with a new cap, fill the system and go for a drive, if your cap was faulty and supposed to hold till XXpsi and let go prior too, you will get the spooge out, as I said previously, this is what happened on my Sno-cat when the cap gave up, would get hot and spooge out, new cap, no issues...
FTE Leadership Emeritus
Joined: Sep 2003
Posts: 12,253
Likes: 763
From: Houston, Texas
Originally Posted by Freedom-over-safety
yeah that’s normal when it gets too hot, too much pressure will force coolant past the cap.
Originally Posted by Pickupmanx2
I would start with a new cap, fill the system and go for a drive, if your cap was faulty and supposed to hold till XXpsi and let go prior too, you will get the spooge out, as I said previously, this is what happened on my Sno-cat when the cap gave up, would get hot and spooge out, new cap, no issues...
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5th Wheeling
Joined: Aug 2018
Posts: 25
Likes: 4
From: MT
Loaded trailer and up a small hill but very similar to the one it overheated on. Nothing! Temp gauge didn't even move a little! Will need to try it on a warmer day with a longer hill to see for sure, but so far so good. Thanks for all the information and help. Very appreciated!
Lead Driver
Joined: Jun 2006
Posts: 5,680
Likes: 1,000
From: Near Yosemite CA
Loaded trailer and up a small hill but very similar to the one it overheated on. Nothing! Temp gauge didn't even move a little! Will need to try it on a warmer day with a longer hill to see for sure, but so far so good. Thanks for all the information and help. Very appreciated!