We have a 2003 Jeep Wrangler...You can smell antifreeze when the engine is running but there is no visible leak. The antifreeze has to constantly be refilled. We recently had the oil changed and the tech pointed out three lines going into the firewall that showed some dampness. Any thoughts?
SOURCE: 2003 Pontiac Montana antifreeze smell?
Bad News. I recently had the same type of smell ( no leaks or puddles either) coming from my van and had to have the intake manifold gasket replaced due to the Dex-cool issue. It appears GM installed an inadequate/substandard gasket when they built the van. My van only had 65,000 miles on it. There's a Dex-cool settlement you could have applied for but repairs had to be made by May of 2008.
This is the only real complaint I've had with the van.
SOURCE: heater core leak ??
Yes it is a heater core leak, here is how to change it.
Remove battery cables. you have to remove the upper dash pad on this paticular year model. with a 10 mm socket and a 1/2 inch extension remove the 5 retaining bolts. remove the blower assembly under the passenger side of dash. remove passenger side seat and center counsole. drain radiator. disconnect hoses from now exposed heater core. turn it 180 degrees and slide out. Replace in reverse order.
SOURCE: Brief antifreeze smell in Jeep
Make sure the cooling system is clean with fresh coolant when u change the core, otherwise u may damge the new core becuase your coolant is worn out, if your Jeep has over 60,000 it should be done anyway, also I recommend at least a new upper radiator hose while it is drainned and inspect the other parts of the system.
SOURCE: 1999 Gr Jeep Cherokee-antifreeze issue
how often does the warning comes on doing the week or in two weeks? if it was a one time thing or this takes place every 3-5 months i wouldn't worry about it. i will make sure that the radiator cap is on tight. you said that all hose seem to be in good condition i would check the radiator where the cooling fan covers the fins and the water pump because it has a warn hole at the base that will seep out antifreeze when the inside seals are going bad these will cause the smell also.
SOURCE: 1999 jeep wrangler leaking coolant from short tube
Sounds like you have a hole in your heater core, if its coolant. If its clear water its A/C condensation which is normal even when your not using it as it cycles to keep the seals lubricated.
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