Question on oil catch can. PCV valve?

icey756 · 08-13-2012, 05:02 AM

I would like to install an oil catch can when i put my car back together since its going to be extremely clean. I would like to keep it that way. In the diagram below it says to put in a PCV valve or check valve. I did some searches and im still confused on which one I should get. Also that diagram is only for the pipe i have circled in green. What about the front thats circled in white? Should that some how get routed to the catch can as well? Any input is great or pics on how yours is installed is even better.

cre · 08-18-2012, 08:01 PM

There's a check valve where the PCV piping runs to the intake plenum/throttle body. As long as that's in tact you do not need a check valve on the pre-turbo connection. It's better that way anyway as you really don't want the catchcan pressurizing everytme you boost. The diagram you've got there isn't the best way to set it up. The vacuum at the accordion tube is lower and less consistent than at the plenum. I would run the PCV hardpipe into the catchcan and then T the line and route the hoses back to both stock locations.

icey756 · 08-19-2012, 12:09 AM

are the PCV hard pipes the pipes i have circled?

cre · 08-19-2012, 04:18 AM

The pipe assembly circled in yellow is the PCV hardpipe. Replace it with the hardpipe from a GE and then run the single nipple to your catch can and then run that into a T pipe which has hoses running to the two ports that the current pipe runs to.... Or make your own however you like.

So in the end you have the nipple from each valve cover running to a T. The single outlet of the T runs into the catch can. The outlet of the catch can runs into a single port of another T pipe. Then one side of that T runs to the port on the throttle body and the other side runs to the pre-turbo port.

icey756 · 08-19-2012, 04:38 AM

I think i got it. From valve cover nipples to "T" then to catch can. Then from can to another "T" and one goes to the throttle body where it would normally run and then the other to the intake where it would run naturally. What about the pipe in front circled in white?

cre · 08-19-2012, 07:37 PM

The hose circled in white would be the plumbing for the ISCV.

icey756 · 08-20-2012, 12:18 AM

Alright so messing with that is a no no. Thanks again cre. Big help per usual

08-13-2012, 05:02 AM	#1
icey756 3" Exhaust Join Date: Jun 2011 Location: Wisconsin Posts: 177	Question on oil catch can. PCV valve? I would like to install an oil catch can when i put my car back together since its going to be extremely clean. I would like to keep it that way. In the diagram below it says to put in a PCV valve or check valve. I did some searches and im still confused on which one I should get. Also that diagram is only for the pipe i have circled in green. What about the front thats circled in white? Should that some how get routed to the catch can as well? Any input is great or pics on how yours is installed is even better. Attached Thumbnails __________________ 1988 7M-GTE Manual Turbo, Godspeed IC, Stock HG Torque to 90FP W/ Arp bolts, Silicon water hose kit, silicon vacuum hoses, Godspeed radiator, 2 12" electric fans.

08-18-2012, 08:01 PM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	There's a check valve where the PCV piping runs to the intake plenum/throttle body. As long as that's in tact you do not need a check valve on the pre-turbo connection. It's better that way anyway as you really don't want the catchcan pressurizing everytme you boost. The diagram you've got there isn't the best way to set it up. The vacuum at the accordion tube is lower and less consistent than at the plenum. I would run the PCV hardpipe into the catchcan and then T the line and route the hoses back to both stock locations. __________________ 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 --->

08-19-2012, 12:09 AM	#3
icey756 3" Exhaust Join Date: Jun 2011 Location: Wisconsin Posts: 177	are the PCV hard pipes the pipes i have circled? __________________ 1988 7M-GTE Manual Turbo, Godspeed IC, Stock HG Torque to 90FP W/ Arp bolts, Silicon water hose kit, silicon vacuum hoses, Godspeed radiator, 2 12" electric fans.

08-19-2012, 04:18 AM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The pipe assembly circled in yellow is the PCV hardpipe. Replace it with the hardpipe from a GE and then run the single nipple to your catch can and then run that into a T pipe which has hoses running to the two ports that the current pipe runs to.... Or make your own however you like. So in the end you have the nipple from each valve cover running to a T. The single outlet of the T runs into the catch can. The outlet of the catch can runs into a single port of another T pipe. Then one side of that T runs to the port on the throttle body and the other side runs to the pre-turbo port. __________________ 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 --->

08-19-2012, 04:38 AM	#5
icey756 3" Exhaust Join Date: Jun 2011 Location: Wisconsin Posts: 177	I think i got it. From valve cover nipples to "T" then to catch can. Then from can to another "T" and one goes to the throttle body where it would normally run and then the other to the intake where it would run naturally. What about the pipe in front circled in white? __________________ 1988 7M-GTE Manual Turbo, Godspeed IC, Stock HG Torque to 90FP W/ Arp bolts, Silicon water hose kit, silicon vacuum hoses, Godspeed radiator, 2 12" electric fans.

08-19-2012, 07:37 PM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The hose circled in white would be the plumbing for the ISCV. __________________ 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 --->

08-20-2012, 12:18 AM	#7
icey756 3" Exhaust Join Date: Jun 2011 Location: Wisconsin Posts: 177	Alright so messing with that is a no no. Thanks again cre. Big help per usual __________________ 1988 7M-GTE Manual Turbo, Godspeed IC, Stock HG Torque to 90FP W/ Arp bolts, Silicon water hose kit, silicon vacuum hoses, Godspeed radiator, 2 12" electric fans.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Bypass Valve Venting To Atmosphere?	Minymurf	MKIII Supra	4	10-04-2010 04:40 AM
Intake Valves Clearance Adjustment question	donkey	MKIII Supra	1	09-14-2009 02:45 AM
valve cover gasket question?	sevenmgte	MKIII Supra	8	10-01-2008 06:02 AM
Valve stem seals?	Kuban	MKIII Supra	9	03-27-2007 02:32 AM
Sequential Turbo Question	suprapoweredsoarer	MKIV Supra	1	06-06-2006 12:13 AM