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1.4 tdi losing coolant

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Hey all, My fiance drives a 2015 1.4tdi, and it's recently been losing coolant, gone over everything i can see in the bay hoses, rad, checked for emulsification, replaced the header tank cap, put UV dye into the tank and refilled with g13, and gone over the entire bay with a uv lamp, nothing anywhere to be found.

 

Are the 1.4's common for EGR Coolers or anything? Car's only on 50k ish so id be surpried but i can't find any external evidence of a leak.

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I'll look into that, No warranty work under our ownership, cant speak for previous owners.

Looking into the cooling system layout, I can only find a couple of areas that could cause an "internal leak" that we couldn't see evidence of those being the EGR Cooler and the Charge Cooler, I'm going to look to get them pressure tested soon.

If it's EGR cooler, you might see signs of water, or more likely water oil mix, on the intake pipe after the EGR.

 

Always worth doing a sniffer test for hydrocarbons in the coolant. 1.4's aren't known for head gasket issues, but it's worth ruling it in or out. 

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