pcv valve

milc80 · 07-20-2010, 06:49 PM

what is the purpose of replacing the pcv valve?

btwilson86 · 07-20-2010, 09:10 PM

Please don't post in the FAQ section, that area is reserved for commonly asked questions.

On most vehicles, the PCV valve allows crankcase vapors and moisture to be sucked into the intake manifold and burned during the normal combustion cycle. I won't go into much detail, but a quick Google search brought this website.

Keep in mind that 7M equipped vehicles do not use a traditional PCV valve

cre · 07-21-2010, 03:14 AM

The valve in systems which use them are nothing more than a check valve... and the GTE has one built into the upper intake plenum where the PCV pipe connects. It is worth inspecting and cleaning from time to time (don't want the crankcase filling with pressurized air, you'll loose your seals)... but I admit I've never pulled one out. The other port see full time vacuum, but it's quite weak.

07-20-2010, 06:49 PM	#1
milc80 Stock Join Date: Jun 2010 Location: west palm beach fl Posts: 8	pcv valve what is the purpose of replacing the pcv valve?

07-20-2010, 09:10 PM	#2
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Please don't post in the FAQ section, that area is reserved for commonly asked questions. On most vehicles, the PCV valve allows crankcase vapors and moisture to be sucked into the intake manifold and burned during the normal combustion cycle. I won't go into much detail, but a quick Google search brought this website. Keep in mind that 7M equipped vehicles do not use a traditional PCV valve __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

07-21-2010, 03:14 AM	#3
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The valve in systems which use them are nothing more than a check valve... and the GTE has one built into the upper intake plenum where the PCV pipe connects. It is worth inspecting and cleaning from time to time (don't want the crankcase filling with pressurized air, you'll loose your seals)... but I admit I've never pulled one out. The other port see full time vacuum, but it's quite weak. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Bad Proportioning Valve?	georides	Non-Generation Specific Questions	5	03-05-2009 03:34 AM
valve cover gasket question?	sevenmgte	MKIII Supra	8	10-01-2008 06:02 AM
egr valve... reusable?	sd88supra	MKIII Supra	3	06-22-2007 06:28 AM
Valve stem seals?	Kuban	MKIII Supra	9	03-27-2007 02:32 AM
Valve Stem Oil Seals	Roger UK	MKIII Supra	1	10-17-2005 01:24 PM