Hi,
I've been lurking for a while already getting great tips here, but time has come to ask for some help...
The 1Z in my 96 Passat has been loosing coolant very slowly - but lately it's gotten worse. Droplets to puddle-size worse. After popping the car up and taking off the bellypan, the G12 has left the tell-tale marks to show the leak on the back of the engine block. See attached photo shot from below lookin up at rear of block - red arrow shows leak on back of block. (Sorry for the bad phone-photo. Let me know if you need a better one to help out)
Good news first - I know where it leaks. WP++ shows no indication of a leak. Neither does condenser nor any hoses. No codes.
But...
1) What is my leaking part?
It looks like a tall metal bottle-cap with two 90-deg pipes sticking out of it. Looks to me like a broke O-ring / seal where the "cap" seats in the block. I don't see this part in any (alledged) 1Z cooling diagrams online, nor does it seem to be mentioned in my Haynes manual. Uneducated guess is it could be a coolant preheater?
2) Is it self-serviceable?
If so, is coolant draining/flush needed? How-tos available? VW part#?
T
I've been lurking for a while already getting great tips here, but time has come to ask for some help...
The 1Z in my 96 Passat has been loosing coolant very slowly - but lately it's gotten worse. Droplets to puddle-size worse. After popping the car up and taking off the bellypan, the G12 has left the tell-tale marks to show the leak on the back of the engine block. See attached photo shot from below lookin up at rear of block - red arrow shows leak on back of block. (Sorry for the bad phone-photo. Let me know if you need a better one to help out)
Good news first - I know where it leaks. WP++ shows no indication of a leak. Neither does condenser nor any hoses. No codes.
But...
1) What is my leaking part?
It looks like a tall metal bottle-cap with two 90-deg pipes sticking out of it. Looks to me like a broke O-ring / seal where the "cap" seats in the block. I don't see this part in any (alledged) 1Z cooling diagrams online, nor does it seem to be mentioned in my Haynes manual. Uneducated guess is it could be a coolant preheater?
2) Is it self-serviceable?
If so, is coolant draining/flush needed? How-tos available? VW part#?
T
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