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Posted (edited)

I put in a new coolant tank about 2-3 years ago, due to the original one leaking.  I replaced the cap with a band new one and all has been fine.  Lately the cap has been coming loose as the engine heats up and coolant bubbles out of it and smokes like crazy.  I bought a brand new cap, tightened it up before I left for work today, and as I got back in my car to leave, the cap was completely loose.  I drove it for about 15 minutes and the cap was loose again.  Faulty threads on the tank?  2000 C2 Cab

Edited by chomper129

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Sounds like so. Has it even been cross threaded? Is it a genuine Porsche coolant tank?

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genuine tank from Pelican Parts.  I don't think its ever been cross threaded.  Ive only taken it off and on a couple times.  The price of a new tank is so high for what it is, and its a pain to get in and out.  I guess i'm outta luck?

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If the brand new cap was genuine parts too, I can't think of why it will come loose other than thread damage on the tank. Have you taken a closer look at the threads on the coolant tank and see if they are stripped?

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I guess they must be even though they don't look like it.  If I try and tighten the cap as tight as it will go, it just slips and loosens again.  New tank is in my future.  thanks for the help Ahsai

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58 minutes ago, chomper129 said:

genuine tank from Pelican Parts.  I don't think its ever been cross threaded.  Ive only taken it off and on a couple times.  The price of a new tank is so high for what it is, and its a pain to get in and out.  I guess i'm outta luck?

 

Be very circumspect about what they call "genuine" or "original equipment", we have seen more than one example of cheap aftermarket stuff being substituted and called " OEM".

 

Get the real thing from a dealer; not cheap, but replacing ain't fun either...………..

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Posted (edited)

^Good point, John.

 

The genuine tank for a 2000 is ~$488 (from sunsetporscheparts.com). If your tank was "only" $200~250, it's likely an aftermarket unit, perhaps with a very confusing name such as " OEM" or "Originally equipped".

Edited by Ahsai

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1 hour ago, Ahsai said:

^Good point, John.

 

The genuine tank for a 2000 is ~$488 (from sunsetporscheparts.com). If your tank was "only" $200~250, it's likely an aftermarket unit, perhaps with a very confusing name such as " OEM" or "Originally equipped".

 

Pelican has a long reputation for doing this, which is why some don't do business with them.

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I recently had a similar experience. My 19 yearly coolant tank sprung a leak on the back side. I replaced it with an " OEM" not genuine tank to save $, and despite having a new genuine Porsche coolant cap, the cap just would not snug, spewed a lot of coolant after a drive, and ruined the coils on that side. I ended up having to redo the whole repair with a genuine Porsche tank and replace coils. I had the same experience with MAF replacement. Buy genuine "Porsche".

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