IPD sale Volvo Parts
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

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

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
xHeart
Posts: 2348
Joined: Sat Dec 03, 2011 8:05 am
Year and Model: 1997 854 NA
Location: Great Lakes - USA
Has thanked: 7 times
Been thanked: 17 times
United States of America
xHeart

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:
Image


--
Golden Retriever | 2014D VIDA DiCE | 2013A XC90 +140mi/225km | 2001 V70XC 1st Owner +190mi/ +305km | 1997 Volvo 850 NA 1st Owner +180mi/ +289km
Past: German Shepherd | 1989 Volvo 740 GL | 1979 Volvo 240

tardcart
Posts: 184
Joined: Fri Feb 08, 2019 4:17 pm
Year and Model: 96 850t. 93 940t
Location: Pittstown Nj
Has thanked: 0
Been thanked: 5 times
United States of America
tardcart

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.



ZionXIX
Posts: 336
Joined: Mon Aug 11, 2014 2:47 pm
Year and Model: 1996 850 Turbo S/W
Location: Texas
Has thanked: 3 times
Been thanked: 21 times
United States of America
ZionXIX

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 https://www.matthewsvolvosite.com/forum ... =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.



User avatar
callahanoffroad
Posts: 145
Joined: Mon Jun 30, 2014 5:25 pm
Year and Model: 1995 850
Location: St. Louis Missouri
Has thanked: 13 times
Been thanked: 9 times
United States of America
callahanoffroad

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 https://www.matthewsvolvosite.com/forum ... =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


Author, Chef, and Shade Tree Mechanic

1995 Volvo 850, Non-Turbo, VVIS, LH FI, Green, 215,000 miles. Herman. https://www.matthewsvolvosite.com/forum ... =1&t=84393

1996 Volvo 850, died at 280,000

Post Reply