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Another overheating problem

 
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  #1 (permalink)  
Old 23 Jun 2016, 11:46 am
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Default Another overheating problem

Hello,

How can one like a car so much that is really a piece of excrement.

Anyway replaced the fans, water pump and belt/idler bearing, ran fine till the MAP senors. By the way for any of you whose engine is running real rough, check the code as mine turned out to be bad (engine light is usually on for the cat so didn't realize a new issue had been added). Replaced and now as smooth as silk.

My issue now is that it runs great for about 30 miles then begins to overheat. Noticed the catch bottle was full but not leaking as yet. Time to replace the cap. Well after 2 different caps - same issue. Never gets hotter than normal until it pushes out too much water. I've disconnected the hose to the catch bottle and watched with a clear line. At running temp and 3k rpm nothing. Fan is running. Second time same scenario I get some fluid. Shut the engine and got a bit of foam. Cannot believe it is a head gasket as then it should be squirting out fluid even cold.

anyone else with this issue? could all of these thermostats have been bad? What can i wreck with a higher pressure cap say 18 lbs?

Any Comments appreciated. I'd like to get my wife's 50 birthday present running reliably again.

Thanks in advance
Marino

Last edited by CREWZIN; 23 Jun 2016 at 11:52 am. Reason: Family forum
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Old 23 Jun 2016, 11:59 am
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Default Re: Another overheating problem

Did you bleed the air out of the cooling system properly after you reassembled everything?
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Old 23 Jun 2016, 12:00 pm
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Default Re: Another overheating problem

Did the engine start to overheat after replacing the water pump?

Have you tried burping and bleeding the coolant system?

What engine trouble codes are you getting now if any?
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Old 24 Jun 2016, 11:55 am
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Default Re: Another overheating problem

Ran for about a year with the new thermostat and water pump no issues till the intermittent "just quit - no restart" which turned out to be the MAP sensor.

The only code I still have has to do with the cat. and something about power steering. Neither of these should effect coolant.

Should not need to bleed a recovery system as long as it is topped off as any excess air will get blown into the recovery bottle then replaced with coolant as long as the bottle does not run out of coolant.

Has anyone tried to run without the radiator cap. on mine the return is right by the cap and spill out. I'm pretty sure that this too is normal with the position of the return. am I wrong?

I'm going to try another new cap at 18lbs to see what gives, unless someone has any other ideas.

Thanks all
Marino
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Old 24 Jun 2016, 12:56 pm
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Default Re: Another overheating problem

I would suggest doing a block test. If you have confirmed that the coolant system has been burped properly, the hose between the cap and the reservoir tank is sealed, and the coolant system is sealed this is what I recommend.
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Last edited by ptcruisersteve; 24 Jun 2016 at 01:02 pm.
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Old 24 Jun 2016, 04:35 pm
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Default Re: Another overheating problem

Borrowed a friend radiator pressure tester. Pumped to 15 lbs no visible leaks after 15 minutes. Started right up with no visible smoke. No water in the oil. No oil in the antifreeze.

Bought a new cap at O'reilly. Same thing. Is there a Chrysler specific rad cap?

Holly smokes this is frustrating.
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Old 24 Jun 2016, 04:45 pm
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Default Re: Another overheating problem

Quote:
Originally Posted by marinoperna View Post
Borrowed a friend radiator pressure tester. Pumped to 15 lbs no visible leaks after 15 minutes. Started right up with no visible smoke. No water in the oil. No oil in the antifreeze.

Bought a new cap at O'reilly. Same thing. Is there a Chrysler specific rad cap?

Holly smokes this is frustrating.
You can also have exhaust getting into the coolant that can be checked with a block test.

Your thermostat should be replaced when you overheat the engine. You will not know unless you take the thermostat out if it is working properly.

Does it overheat only at high speeds or low speeds or both?
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Old 24 Jun 2016, 11:47 pm
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Default Re: Another overheating problem

Quote:
Originally Posted by marinoperna View Post
Borrowed a friend radiator pressure tester. Pumped to 15 lbs no visible leaks after 15 minutes. Started right up with no visible smoke. No water in the oil. No oil in the antifreeze.

Bought a new cap at O'reilly. Same thing. Is there a Chrysler specific rad cap?

Holly smokes this is frustrating.

Did it hold pressure..??
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Old 25 Jun 2016, 12:49 am
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Default Re: Another overheating problem

Quote:
Originally Posted by LionPT View Post
Did it hold pressure..??
I am suggesting possibly a small exhaust leak getting into the coolant system. Sometimes when you get the start of a head gasket leak its hard to diagnose and you start looking at other components first such as radiator, thermostat, radiator cap, etc.
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