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P80 Positive Temp Coefficient Nipple "PTC VALVE" To drill, or not to drill

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Re: P80 Positive Temp Coefficient Nipple "PTC VALVE" To drill, or not to drill

Post by xHeart » Tue Apr 16, 2019 9:23 am

erikv11 wrote: ↑
Tue Apr 16, 2019 9:08 am
... And non-turbo cars like yours do not have a PTC. You may be thinking of the flame trap orifice specific to NA cars, which can be accessed by removing the air intake from the front grill and/or the air filter box for full access.
Flame trap:
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Re: P80 Positive Temp Coefficient Nipple "PTC VALVE" To drill, or not to drill

Post by tardcart » Tue Apr 16, 2019 11:01 am

Im glad to finely know what PTC stands for, though I've forgotten already. Although I once thought it made sense to enlarge the hole, now I don't, though its reason to be is not clear. I do think that a one way valve should be put on the small vac line from the manifold to allow vac only and no turbo pressure into the PTC area.

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Re: P80 Positive Temp Coefficient Nipple "PTC VALVE" To drill, or not to drill

Post by ZionXIX » Tue Apr 16, 2019 1:30 pm

erikv11 wrote: ↑
Tue Apr 16, 2019 9:00 am
I first posted these in ZionXIX's thread viewtopic.php?f=1&t=84698. It's been 18 months now, with no ill effects on my 95 R.
Literally not a single issue since I followed your suggestion. I am considering upgrade the pcv hose to a copper pipe when I change out the pcv.

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Re: P80 Positive Temp Coefficient Nipple "PTC VALVE" To drill, or not to drill

Post by callahanoffroad » Wed Apr 17, 2019 8:33 am

ZionXIX wrote: ↑
Tue Apr 16, 2019 1:30 pm
erikv11 wrote: ↑
Tue Apr 16, 2019 9:00 am
I first posted these in ZionXIX's thread viewtopic.php?f=1&t=84698. It's been 18 months now, with no ill effects on my 95 R.
Literally not a single issue since I followed your suggestion. I am considering upgrade the pcv hose to a copper pipe when I change out the pcv.
I did this on my non turbo although I used a very tough flexible fuel line. 5/8" I think. My wacky manifold shape requires some flexy bending. I can say that the pcv properly functions. But I still suspect that I have blow-by as my oil smokes every 3000 miles. I just learned to accept that it means that I need to change my oil. Hahahaha
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Re: P80 Positive Temp Coefficient Nipple "PTC VALVE" To drill, or not to drill

Post by abscate » Fri Nov 15, 2019 5:23 am

If anyone needs a replacement nipple ...😳....I have one from a snorkel replacement.
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Re: P80 Positive Temp Coefficient Nipple "PTC VALVE" To drill, or not to drill

Post by Peevarino » Fri Nov 15, 2019 6:29 am

Rattnalle wrote: ↑
Tue Apr 16, 2019 7:06 am
Volvo put it there for a reason. Don't mess with it other than making sure it works by cleaning it.

My two cents.

PS that goes for things like cats and other stuff as well.
I thought cats cleaned themselves? Hence all the hairballs. It’s definitely good to just leave them where they are.
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Re: P80 Positive Temp Coefficient Nipple "PTC VALVE" To drill, or not to drill

Post by abscate » Fri Nov 15, 2019 6:43 am

Peevarino wrote: ↑
Fri Nov 15, 2019 6:29 am
Rattnalle wrote: ↑
Tue Apr 16, 2019 7:06 am
Volvo put it there for a reason. Don't mess with it other than making sure it works by cleaning it.

My two cents.

PS that goes for things like cats and other stuff as well.
I thought cats cleaned themselves? Hence all the hairballs. It’s definitely good to just leave them where they are.
You are going to fit in here really well.

:lol: :lol: :lol:
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Re: P80 Positive Temp Coefficient Nipple "PTC VALVE" To drill, or not to drill

Post by Rattnalle » Fri Nov 15, 2019 2:40 pm

Peevarino wrote: ↑
Fri Nov 15, 2019 6:29 am
Rattnalle wrote: ↑
Tue Apr 16, 2019 7:06 am
Volvo put it there for a reason. Don't mess with it other than making sure it works by cleaning it.

My two cents.

PS that goes for things like cats and other stuff as well.
I thought cats cleaned themselves? Hence all the hairballs. It’s definitely good to just leave them where they are.
:lol:

Don't mess with it still applies though. :D
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