Car was wanting to stall out upon stopping at lights never has but stutters a bit. The check engine light just came on had it the the dealership and they found antifreeze in the fourth cylinder cleaned it out replaced spark plug and had it on the pressure test found no leaks or warps or low spots on head. They also said they found no cracks in the engine block. That was last year and it just started to do the same as before with the wanting to sputter out. Not sure how antifreeze is ending up flooding that cylinder.. any ideas?
Jake 115w
The coolant is building up in the cavity/hole the spark plug goes through and into the head? There's not too many ways for that to happen. If something like the turbo coolant lines or another pressurized coolant hose were leaking and spraying underhood you should able to tell fairly easy.
With that said, I believe there are higher than normal failure rate on the coolant outlet/tube/fitting near the driver side of the head. It's under the engine cover and could possibly be spraying coolant up onto the valve cover.
Other than that about the only other way for coolant to be building up in the plug hole (assuming you're sure it's coolant) would be for a cracked head. Sometimes very slight cracks will only weep when hot and the aluminum expands and under greater coolant pressure and not show when pressure testing a cold engine.
I don't recall hearing about problems with bad castings on the 1.4L so I'd very carefully check any coolant carrying fittings and hoses first. If it is the common plastic coolant outlet the good news is it should be pretty easy and fairly cheap to fix.
With that said, I believe there are higher than normal failure rate on the coolant outlet/tube/fitting near the driver side of the head. It's under the engine cover and could possibly be spraying coolant up onto the valve cover.
Other than that about the only other way for coolant to be building up in the plug hole (assuming you're sure it's coolant) would be for a cracked head. Sometimes very slight cracks will only weep when hot and the aluminum expands and under greater coolant pressure and not show when pressure testing a cold engine.
I don't recall hearing about problems with bad castings on the 1.4L so I'd very carefully check any coolant carrying fittings and hoses first. If it is the common plastic coolant outlet the good news is it should be pretty easy and fairly cheap to fix.
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