Question about 2004 Dodge Ram 1500

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2004 Dodge Ram 1500 5.7L Hemi coolant leak: I

2004 Dodge Ram 1500 5.7L Hemi coolant leak: I have had a small coolant leak from the thermostat housing off and on almost ever winter since the truck has been new. Seems to start when it gets cold overnnight. I have replaced the thermostat (gasket attached) about a half dozen times. I have replaced the housing or cover figuring the original may have been warped. This past fall I replaced the water pump which the thermostat is part of. All of these things solve the problem for a few months then the leak returns. Anyone ever experience this? I have even tried RTV and the leak returns. Only thing I can figure is that the gasket moves with the heating and cooling of the engine and finally hits a stop where it leaks. I have checked all the hoses and everything else the leak is defiantly thermostat.

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WELL I DO HAVE A SOLUTION TAKE THE PART TO A MACHINE SHOP HAVE THEM MAKE YOU ONE OUT OF ALUMINIUM IF IT REALLY BOTHERS YOU THAT MUCH

Posted on Dec 05, 2013

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I too have the same problem. Seems it starts to leak when the season changes from winter to spring or summer to winter. I was told by an old mechanic that the problem stems from the fact that the housing bolts to aluminum. And the two mmetals have issues relating to expansion and contraction at different rates. No sollution, you just have to keep replacing the gasket every six months or so.

Posted on Nov 03, 2012

  • Charles D. Hearne Nov 03, 2012

    See.... the housing is steel, and the place at which it bolts to is aluminum. It is a design flaw. The housing should have been made out of aluminum also, therefore the two metals would expand and contract at the same rate when the engine is cooling down.

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Posted on Jan 02, 2017

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SOURCE: changed water pump,thermostat, top rad.

That is called the bypass hose. It could be leaking but I'd take a closer look at the thermostat housing. If you replaced only the thermostat and not the housing, the housing may be leaking. It's a common source of coolant leaks.

Posted on Apr 16, 2011

tragedy lok
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SOURCE: replaced defective water pump. coolant leak

u got me there if u changed water pump and gasket making sure to snug the bolts u should be ok,as far as ur timming cover i dond see that just happening you know dosent make much sense waking up in the morning and overmight ur timming cover bent unlkess u do some rouigh driving and maybe over heated it or just got hot u would know more than me about that subject,go thru again and snug the bolts,start it with a flash light crawl under the truck and get a better look at thing maybe pressure wash the block first hope this helps u any

Posted on Oct 21, 2009

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SOURCE: leaking coolant from a small hole located in the

water pump failure, water pump on these run off the timing chain and the timing chain runs in oil, so they could not just put a weep hole on the pump because it would go strait to the oil pan, instead they redirected the coolant from the leaking pump to just below the thermostat housing. And good luck, it's at least a 6 hour job on these. Brandon-MO

Posted on Jan 21, 2010

mabpest
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SOURCE: 2004 dodge ram 1500 hemi

My tips" heater troubleshooting"///on my profile may help you troubleshoot your issues.

Posted on Feb 09, 2011

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