Keeps boiling over in the overflow like its building up pressure in the radiator and leaks all the water out?

JHARTS

MEMBER
2010 DODGE CARAVAN
3.3L
6 CYL
2WD
AUTOMATIC
182,000 MILES

The vehicle listed above keeps boiling over in the overflow like its building up pressure in the radiator and leaks all the water out I took the intake off and on the right side. It had like a white chalky stuff I cleaned it I guess my question is, do you think it's a head or head gasket issue or a clogged in the coolant system? Here are some pics.

Tuesday, May 13th, 2025 AT 6:41 PM

4 Replies

JHARTS

MEMBER
3 POSTS

Engine runs fine no misfire, no water in oil.

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Tuesday, May 13th, 2025 AT 6:49 PM

KEN L

MASTER CERTIFIED MECHANIC
54,137 POSTS

I don't see the images can you please reload them? Also, the head gasket can be blown without coolant in the oil, here are two guides to help confirm the failure:

https://www.2carpros.com/articles/head-gasket-blown-test

and

https://www.2carpros.com/articles/recognizing-the-symptoms-understanding-a-blown-head-gasket-in-your-vehicle

Please go over these guides and get back to us.

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Wednesday, May 14th, 2025 AT 1:08 PM

JHARTS

MEMBER
3 POSTS

Here they are.

Images (Click to make bigger)

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Wednesday, May 14th, 2025 AT 2:04 PM

KEN L

MASTER CERTIFIED MECHANIC
54,137 POSTS

Oh man, it looks like someone has tried stop leak, this means the cooling system is full of this stuff. The cooling system will need to be flushed and don't be surprised if the heater doesn't work and you will need a new radiator, plus you will need to pull the cylinder heads to see if the head gasket as failed. Please go over the guides above to see what else it can be, ei: cracked heads or block, most of the time it will be the head gasket :) Please let me know.

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Thursday, May 15th, 2025 AT 10:47 AM