Oil catch can questions - Ford Mustang Forum
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post #1 of 16 (permalink) Old 01-09-2011 Thread Starter
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Oil catch can questions

I have read all the threads I could find on this, but it still leaves some questions. It looks to me that the 2011 5.0 has 2 PCV valves. One on the passenger side and one on the drivers side. Looking at the service manual it only addresses the passenger side PCV valve.
It appears the passenger side connects to the intake manifold itself which would provide sealed vacum from the engine. The drivers side appears to connect to the CAI at a point just before the throttle body connection and uses a larger diameter hose.

My question is why not then install Catch cans on both sides as they both have the potential of streaming oil back into the manifold?
And are there really 2 PCV valves. Since I don't have a car to look at(ordering 2012)and I'm trying to aquire parts be it arrives.
THANKS................TC

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post #2 of 16 (permalink) Old 01-09-2011
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Not sure about the 5.0 needing a oil catch can. But you won't get any oil on the passenger side.






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post #3 of 16 (permalink) Old 01-09-2011
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Maybe the LH is the primary circulation for everyday driving & RH is a secondary for higher pressure deviations such as WOT? Your guess is as good as mine but I am curious.

I do have a the JLT seperator & it's on the LH side. I don't think they make a RH one for 2011s.

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post #4 of 16 (permalink) Old 01-09-2011
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I think it's the high compression of the 5.0 that causes blow by..I have the JLT piece and it gets some oil. according to jay from JLT, most of the blow by comes from passenger PCV (80%). he claims he only saw oil on the drivers side when doing a road course event and none while driving normally on the street so last I heard JLT still isn't sure the will release a kit for drivers side PCV...also I'm not so certain these lines are vacuum; the oem hoses don't look like vacuum lines at all

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post #5 of 16 (permalink) Old 01-09-2011
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Quote:
Originally Posted by Threebanger View Post
Maybe the LH is the primary circulation for everyday driving & RH is a secondary for higher pressure deviations such as WOT? Your guess is as good as mine but I am curious.

I do have a the JLT seperator & it's on the LH side. I don't think they make a RH one for 2011s.
Doh! re-reading my post I realized my logic at the time was looking at the motor from the front. Switch my LH & RH for true location on the vehicle. I apologize for being a hot mess.

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post #6 of 16 (permalink) Old 01-10-2011
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Just took mine off for the 1st time and it had about 2/3 a teaspoon in it. This is after less that 150 miles mixed of normal driving & playing around.

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post #7 of 16 (permalink) Old 01-10-2011 Thread Starter
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So I guess the answer is no one really knows for sure. Is the hose sze 5/16" on both sides. Thanks everyone for your responses.
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post #8 of 16 (permalink) Old 01-11-2011
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You can not go wrong with a catch can. It was my first mod on the Mustang.

Long story short: I was datalogging my previous '07 SRT8 Charger and could not figure out why the PCM was pulling timing (thus reducing power) at high rpm. I installed a catch can and, sure enough, my timing was rock steady. The oil coming in through the pcv system was contaminating the intake charge.

I didn't even mess around with the Mustang, JLT catch can installed on day 2 of ownership.

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post #9 of 16 (permalink) Old 01-12-2011
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IIRC....the passenger side is the "primary" PCV pulling from the crankcase, the driver's side is the inlet supplying clean filtered air into the crankcase (except during WOT when both probably are pulling)...so a can is only really needed on the passenger side.

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post #10 of 16 (permalink) Old 01-14-2011 Thread Starter
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Thanks Drew that's the answer I was looking for.
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Is installing an oil catch can relatively easy? And possibly fairly inexpensive?
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it is a very easy and fast install especially if you dont have a strut brace...probably takes 1 minute with no strut brace.


however, if you do have a strut brace it is recommended that you take it off so that you can lift the engine cover high enough to get to the intake side of the passenger PCV fastener. i said "f*** that" and just kept my strut brace on and the engine cover lifted up a few inches just enough for me to access it without taking off the brace.

sadly, it took me 5 min

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The JLT takes only a few minutes to install because it comes completely assembled with factory hoses. The UPR came in pieces so you have to assemble it and the instructions suck - only says to assemble the catch can and doesn't tell you how. It doesn't use stock hoses either. I sold the UPR and ordered the JLT which is much nicer in my opinion.
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Thanks for the info on JLT... will be ordering

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what causes the blow by? i have been catching a good amount in my car..


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