is the pcv valve my prob. with to much crank case preesure?

Chevysucks · 10-07-2002, 11:17 AM

hey guys, oil is comming up to the top of the dipstick tube. My dad told me that I have way to much crank case pressure, and his friend is a mechanic and told him that it could be the screen under the pcv valve. Should I get a new pcv valve and a new screen. If so do I just tell the guy at the counter for a pcv valve screen? Is it all hard to change?
thanks for your time

95mustanggt · 10-07-2002, 11:47 AM

Sounds like you have a bit of my problem. Since the PCV is a maintenance item. I would just replace it anyway.

On the 94/95 GT's its at the back of the intake manifold, I'm sure the older 5.0L's are very similar.

Chevysucks · 10-08-2002, 10:46 AM

yes it is right in back of the intake manifold. I am going to pick one up tomarrow. I hope this solves the problem.

Chevyguy · 10-08-2002, 04:12 PM

Dude, get the PCV and screen from Ford!! The aftermarket PCV valves don't fit right and can cause a big leak. I imagine your screen is plugged up, and that is what is causing the excessive crankcase pressure.

jruppert · 04-24-2003, 04:57 PM

I am having the same exact problem. When I get into high rpm's the oil spits out of the dipstick. I put a new pcv valve on but doesnt help. I took the wire mesh screen out to inspect and it looked pretty dirty. I soaked it over night in some degreaser and when I checked the next day it was totally saturated in what looked like hardened cooking oil. I had to order a new screen which is around $7 from ford. Hopefully this works

aar0s · 04-26-2003, 03:52 PM

while your at it you might as well change the rubber gasket that the pvc sits in, mine fell out and went to sit next to the 1/2 socket that i never found.

jruppert · 04-26-2003, 11:19 PM

I installed an air breather on the valve cover (replacing the oil cap) and it took care of my problem.

james87gt · 04-28-2003, 06:28 PM

try a new pvc valve and screen but it sounds like blowby

10-07-2002, 11:17 AM	#1
Chevysucks Registered Member Join Date: Mar 2000 Location: Stroudsburg, PA, USA Posts: 150	is the pcv valve my prob. with to much crank case preesure? hey guys, oil is comming up to the top of the dipstick tube. My dad told me that I have way to much crank case pressure, and his friend is a mechanic and told him that it could be the screen under the pcv valve. Should I get a new pcv valve and a new screen. If so do I just tell the guy at the counter for a pcv valve screen? Is it all hard to change? thanks for your time __________________ 88 Stang 306 ci. GT Mustang heads- ported and polished/milled---Soon to be AFR 185cc 1.7 crane roller rockers/extra hardened pushrods FRPP X-303 Cam Stock Intake-1 inch intake spacer BBK Cold Air Induction Stock Injectors--going to 24 pounders BBK Full Length Headers Mac 2.5 inch Cat-Back 8 Point Cage Sub Frame Connectors World Class T-5 Steeda Shift Cable,Quadrant,Firewall adjuster King Cobra Clutch Pro 5.0 Shifter Alunimum Driveshaft/ Drive shaft loop Kenny Brown suspension 3.55 gears

10-07-2002, 11:47 AM	#2
95mustanggt Registered Member Join Date: May 2000 Location: Kamloops, BC Posts: 2,875	Sounds like you have a bit of my problem. Since the PCV is a maintenance item. I would just replace it anyway. On the 94/95 GT's its at the back of the intake manifold, I'm sure the older 5.0L's are very similar. __________________ 1995 Mustang GT 20016 F150 Lariat Super Crew

10-08-2002, 10:46 AM	#3
Chevysucks Registered Member Join Date: Mar 2000 Location: Stroudsburg, PA, USA Posts: 150	yes it is right in back of the intake manifold. I am going to pick one up tomarrow. I hope this solves the problem. __________________ 88 Stang 306 ci. GT Mustang heads- ported and polished/milled---Soon to be AFR 185cc 1.7 crane roller rockers/extra hardened pushrods FRPP X-303 Cam Stock Intake-1 inch intake spacer BBK Cold Air Induction Stock Injectors--going to 24 pounders BBK Full Length Headers Mac 2.5 inch Cat-Back 8 Point Cage Sub Frame Connectors World Class T-5 Steeda Shift Cable,Quadrant,Firewall adjuster King Cobra Clutch Pro 5.0 Shifter Alunimum Driveshaft/ Drive shaft loop Kenny Brown suspension 3.55 gears

10-08-2002, 04:12 PM	#4
Chevyguy Backyard Mechanic/Chemist Join Date: Feb 2001 Location: Acton MA USA Posts: 435	Dude, get the PCV and screen from Ford!! The aftermarket PCV valves don't fit right and can cause a big leak. I imagine your screen is plugged up, and that is what is causing the excessive crankcase pressure. __________________ 2001 Crown Vic Maurader Airbox/MAF, DR chip Edel IAS shocks Single exhaust :wtf: 93 P-71 Vic interceptor Backup car now 90 5.0 LX Notch SOLD 74 Chevy Laguna type S-3 454 under construction Currently apart undergoing bodywork.

04-24-2003, 04:57 PM	#5
jruppert Registered Member Join Date: Jul 2001 Location: Reed City Mi Posts: 106	I am having the same exact problem. When I get into high rpm's the oil spits out of the dipstick. I put a new pcv valve on but doesnt help. I took the wire mesh screen out to inspect and it looked pretty dirty. I soaked it over night in some degreaser and when I checked the next day it was totally saturated in what looked like hardened cooking oil. I had to order a new screen which is around $7 from ford. Hopefully this works __________________ '94 GT, 347 stroker, AFR 185's, Trick Flow stage 2 Cam, Edelbrock upper and lower, 70mm Tbody, 77mm MAF, 24lb injectors, 255 lph pump, underdrive pulleys, 1 5/8 Motorsport Headers, king cobra clutch, tremec tko, 3.73 gears, flowmasters

04-26-2003, 03:52 PM	#6
aar0s Registered Member Join Date: Nov 1998 Location: southern Illinois Posts: 312	while your at it you might as well change the rubber gasket that the pvc sits in, mine fell out and went to sit next to the 1/2 socket that i never found. __________________ 88 gt convertable =-= cobra intake, accufab 65 mm tb headers alum underdrives steeda alum.lca's, springs, c/c plates kyb struts 230 hp to da wheels http://www.cybersteed.freeservers.com

04-26-2003, 11:19 PM	#7
jruppert Registered Member Join Date: Jul 2001 Location: Reed City Mi Posts: 106	I installed an air breather on the valve cover (replacing the oil cap) and it took care of my problem. __________________ '94 GT, 347 stroker, AFR 185's, Trick Flow stage 2 Cam, Edelbrock upper and lower, 70mm Tbody, 77mm MAF, 24lb injectors, 255 lph pump, underdrive pulleys, 1 5/8 Motorsport Headers, king cobra clutch, tremec tko, 3.73 gears, flowmasters

04-28-2003, 06:28 PM	#8
james87gt Registered Member Join Date: Jan 2002 Posts: 62	try a new pvc valve and screen but it sounds like blowby

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