PCV Oil Seperator - Cherokee SRT8 Forum
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post #1 of 100 (permalink) Old 04-27-2007, 09:27 AM Thread Starter
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Exclamation PCV Oil Seperator

I just had a shop fabricate me a oil catch can or seperator between the PCV valve and the throttle body. The next few days to weeks will reveal how well it works. The trick is to fit it close and in the spot between them.

The reason I did this was all the oil found in the intake and throttle body area. This oil was on the head and along the intake. Oil in the intake track will cause detonation and dilute the intake charge causing substantial power loss.

Also I know I had it and others as well.........the blue puff of smoke at start up, that isnt our motors its the heavy oil being sucked into your manifold! Open the valve body and drag a rod or probe along the bottom and you will get oil dredge.

Anyway this problem is common and a not talked about problem until the intake valve is gummed up and the entire intake tract is saturated.

http://www.c-speedracing.com/howto/c...n/catchcan.php
http://www.accmachtech.com/pcvcatchcans.htm
http://www.lnsauto.com/articles/ford..._article.shtml
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post #2 of 100 (permalink) Old 04-27-2007, 09:55 AM
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Re: PCV Oil Seperator

The oil catch-can is a very popular mod on the Harley F-150s & Lightnings.

Steve
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post #3 of 100 (permalink) Old 04-27-2007, 10:37 AM
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Re: PCV Oil Seperator

....I didn't realize this would be a problem, on a "non-blown" vehicle.

I had them on my Lightnings & Cobra.....

Go to Walmart, buy an air compressor (Campbell-Hausfield) seperator and
fittings, that is what I did. I also like the idea of a clear one.

thanks for the tip.

2007 Red Rock.... slightly modded, but BAD 2 the BONE!
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post #4 of 100 (permalink) Old 04-27-2007, 11:57 AM
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Re: PCV Oil Seperator

here's what alot of Lightning, Harley, Corvette and LSx motors run:

http://www.midwestpd.com/catalog/pro...db15b019fb320e


ran one for over a year and not a drop of oil in my intake. (Lightning)

have one on order now.

Dave
2007JGCSRT8
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post #5 of 100 (permalink) Old 04-27-2007, 03:03 PM Thread Starter
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Re: PCV Oil Seperator

Quote:
Originally Posted by DavesSRT8
here's what alot of Lightning, Harley, Corvette and LSx motors run:

http://www.midwestpd.com/catalog/pro...db15b019fb320e


ran one for over a year and not a drop of oil in my intake. (Lightning)

have one on order now.

Dave
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I just ordered one of these to take a look. The point is our manifolds are drenched in oil!!!! This will cause detonation and loss of power.
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post #6 of 100 (permalink) Old 04-27-2007, 04:04 PM
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Re: PCV Oil Seperator

Quote:
Originally Posted by generalconfusion
I just ordered one of these to take a look. The point is our manifolds are drenched in oil!!!! This will cause detonation and loss of power.
i hope they have enough of them because i ordered one about an hour ago.


on a side note, i had recently had my oil changed (1st one) at my dealership. i checked the oil level the next day cold & it was spot on. a week or so later i was looking inside my stock air cleaner box just poking around and i noticed engine oil puddles in the square pockets at the bottom, inside the box. the clean oil was coming from the crankcase breather vent tube right below the filter. it had even washed off some of the red oil from my K&N flat panel filter as it was being sucked up through. i wiped up as much oil as i could with paper towels (took about 8 paper towels) but i couldnt get all of it out of the molded squares.

i removed the vent tube completely & added a breather filter (where the fitting comes out of the oil filler tube) that i picked up from my local auto parts store. i've been running the breather filter for about a week now & no more oil in my air cleaner box & it's running fine.

now i dont know if it was actually sucking oil through the breather tube while the engine was running or the oil may have gotten down the tube when the oil was being filled during the oil change, but in any event no more oil is getting into my air cleaner.

2007 gcsrt8

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post #7 of 100 (permalink) Old 04-27-2007, 04:34 PM
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Re: PCV Oil Seperator

Be VERY careful when running a breather on the crankcase. It can throw off the air/fuel big time. On Lightnings, they require a custom tune (reflash) of the PCM to accomodate the change - you MAY lean out, so watch your A/F.

The catch cans I posted used to be made by AMW, but now the midwest PD folks took over. They probably are on backorder.

Inside the catch can, you will find something that looks like stainless steel steel wool. Works very well, but you will have to make your own mounting bracket. I used pretty heavy gage steel to make mine, as these are pretty hefty and will wobble around if not mounted correctly.

the LSx motor guys swear by these, as do Lightning/Harley folks. The nice thing is you just put a baggie under the pet**** and drain it every once in a while.

Even if on backorder, they are worth the wait. VERY well made.

Dave
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post #8 of 100 (permalink) Old 04-27-2007, 04:47 PM
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Re: PCV Oil Seperator

Steve great find!

When I removed my manifold for the spacer install and turned it upside down it was dry so I was pretty happy about that. Looked inside all ok. No oil.

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Last edited by Inferno SRT8; 04-28-2007 at 12:16 AM.
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post #9 of 100 (permalink) Old 04-27-2007, 07:05 PM
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Re: PCV Oil Seperator

Quote:
Originally Posted by DavesSRT8
Be VERY careful when running a breather on the crankcase. It can throw off the air/fuel big time. On Lightnings, they require a custom tune (reflash) of the PCM to accomodate the change - you MAY lean out, so watch your A/F.

The catch cans I posted used to be made by AMW, but now the midwest PD folks took over. They probably are on backorder.

Inside the catch can, you will find something that looks like stainless steel steel wool. Works very well, but you will have to make your own mounting bracket. I used pretty heavy gage steel to make mine, as these are pretty hefty and will wobble around if not mounted correctly.

the LSx motor guys swear by these, as do Lightning/Harley folks. The nice thing is you just put a baggie under the pet**** and drain it every once in a while.

Even if on backorder, they are worth the wait. VERY well made.

Dave
They are still made by AMW, I contacted them directly today to see if I could order through them (texas). They directed me to Midwest and told me the turned over the sales portion to them but they still make them.
http://www.accmachtech.com/pcvcatchcans.htm

2006 Jeep SRT8
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post #10 of 100 (permalink) Old 04-27-2007, 10:33 PM
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Re: PCV Oil Seperator

I'll be checking my TB for oil residue soon. Those of you that ordered the catch can let us know how you like it(if it works well)?


'06 GC (Laredo) SRT8 InfernoRed EntryLevelJeep
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