sucking oil in intake

91-killerstang · 02-26-2004, 12:34 AM

I just finished putting the new motor in and now its sucking alot of oil in through pcv, its always sucked a little but now its so bad I leave a smoke trail behind me.

Yes the intake has the baffle on it and yes the pcv has the screen I've replaced the pcv installed a fuel filter in line but oil just goes right through it
any ideas???

429mustang · 02-26-2004, 08:09 AM

I'm not sure, but I'd probably get pissed and brake something.

Hozer 88GTConv · 02-26-2004, 10:12 AM

Install a in-line breather baffle.(If you are not concerned about emissions)
And if you don't have breathers on your valve covers, consider installing them.

91-killerstang · 02-26-2004, 10:42 AM

yea that's what I planned to cap off pcv and install a beather in the vc, but that just a bandaid fix. I prefer to keep my pcv,but not at the cost of a quart ever 100 miles

LX XLR8R · 02-26-2004, 11:08 AM

use a motorcraft PVC and if that doesnt fix it then run a inline fuel filter..worked for me

91-killerstang · 02-26-2004, 02:13 PM

I've tried that didn't help

mustangman4 · 02-27-2004, 04:32 AM

What kind of valve covers are you using? Are you still running the tube from the pass side valve cover to the throttle body? What happens when you take the oil cap off while running do you get the same effect? Have you checked manifold vacum at idle and WOT. Do you get pressure or just vacum? It almost sounds like you have an oil passage blocked somewhere and oil cant return to the pan quick enough. I heard of an FMS A-4 block come directly from Ford with no oil return passages drilled out. OOPS.

Brad

Hozer 88GTConv · 02-29-2004, 09:01 AM

I too have a lot of oil in my upper intake runners. In particular number 5. I think that my pcv letting way too much through and on my GT40 intake, the way the vacuum tree runs underneath the plenum it seems to be pulling in a lot in number 5. In fact , it may be the reason I am fouling number 5. It is wierd that it is bad in just one cylinder, but the vacuum tree position makes it look like something worth checking out.
After checking valve seals, compression, etc, it seems that the oil is too high in the runner (in the upper runner!) to be a problem in the head.
I run one moroso breather on the passenger side vc. I also have a Melling high-volume oil pump and my oil pressure is seldom below 60 psi. And yes, I gotta clean the area every month because of oil vapor.
I think you are on to something, and I have read that there is a particular motorcraft pcv that should alleviate the problem. I think that is what XLR8R was talking about.

84LX89GT · 03-03-2004, 10:04 PM

Something interesting you can try (that i've done on higher mileage cars) is take off the oil cap and rev the engine a little, you can sometimes get an idea of how much blowby your getting by seeing it coming out the oil filler.

Hozer 88GTConv · 03-03-2004, 10:23 PM

I actually put three feet of 3/8" vacuum hose between my pcv and the upper intake manifold vacuuum tree. About 8 inches before the manifold connection, I put a clear fuel filter with a paper element in it.
Holy *****.
I couldn't believe how much oil is getting by in vapor form.
I cleaned out my upper intake manifold which was filthy.

Only bad thing is, I'm still fouling number 5.
Did ANOTHER dry compression test
5-108 PSI
6-108
7-112
8-118
these were off of it cold.
I still have no smoke ever.

Anyway, I am convinced that it is a blown head gasket or bad oil control ring on number 5. I just have to figure out three days that I can take my car out of service to tear it down.

Then, might as well make a 331 out of it right?

02-26-2004, 12:34 AM	#1
91-killerstang Registered Member Join Date: Feb 2004 Location: fayetteville nc Posts: 6	sucking oil in intake I just finished putting the new motor in and now its sucking alot of oil in through pcv, its always sucked a little but now its so bad I leave a smoke trail behind me. Yes the intake has the baffle on it and yes the pcv has the screen I've replaced the pcv installed a fuel filter in line but oil just goes right through it any ideas??? __________________ Rob 91GT black on black 5spd new production short block, cane 2031cam, 1.7 rr, home ported stock heads, edel. performer intake, 65mm tb, 76mm mas, BBK long tubes o/h pipe dynomax cat back

02-26-2004, 08:09 AM	#2
429mustang Registered Member Join Date: May 2001 Location: westerville, OH USA Posts: 618	I'm not sure, but I'd probably get pissed and brake something. __________________ 1990 Notchback: BBK Ceramic Coated Full length headers, Dr. Gas 3"- 2 1/2" x-pipe, Flowmaster 40's/turndowns.

02-26-2004, 10:12 AM	#3
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	Breather Install a in-line breather baffle.(If you are not concerned about emissions) And if you don't have breathers on your valve covers, consider installing them. __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

02-26-2004, 10:42 AM	#4
91-killerstang Registered Member Join Date: Feb 2004 Location: fayetteville nc Posts: 6	yea that's what I planned to cap off pcv and install a beather in the vc, but that just a bandaid fix. I prefer to keep my pcv,but not at the cost of a quart ever 100 miles __________________ Rob 91GT black on black 5spd new production short block, cane 2031cam, 1.7 rr, home ported stock heads, edel. performer intake, 65mm tb, 76mm mas, BBK long tubes o/h pipe dynomax cat back

02-26-2004, 11:08 AM	#5
LX XLR8R Dirk Diggler Join Date: Feb 1999 Location: SLOATSBURG, NY Posts: 1,931	use a motorcraft PVC and if that doesnt fix it then run a inline fuel filter..worked for me __________________ 95 undecided cubes, AFR 185s,undecided cam, undecided intake, and a 150 hit 89 "turbonotch" 2.3T You might want to hold on..i saw this on a cartoon once

02-26-2004, 02:13 PM	#6
91-killerstang Registered Member Join Date: Feb 2004 Location: fayetteville nc Posts: 6	I've tried that didn't help __________________ Rob 91GT black on black 5spd new production short block, cane 2031cam, 1.7 rr, home ported stock heads, edel. performer intake, 65mm tb, 76mm mas, BBK long tubes o/h pipe dynomax cat back

02-27-2004, 04:32 AM	#7
mustangman4 Registered Member Join Date: Feb 2003 Location: Oshkosh WI Posts: 69	What kind of valve covers are you using? Are you still running the tube from the pass side valve cover to the throttle body? What happens when you take the oil cap off while running do you get the same effect? Have you checked manifold vacum at idle and WOT. Do you get pressure or just vacum? It almost sounds like you have an oil passage blocked somewhere and oil cant return to the pan quick enough. I heard of an FMS A-4 block come directly from Ford with no oil return passages drilled out. OOPS. Brad __________________ 93 GT 306 DSS, O-Ringed, AFR 185's, Pro Products Intakes, 55lb low imp inj, 80mm Pro-M meter, 2004 PMS, AFM Power Pipe, Kirban Reg, Vortech S-Trim 14lbs. No times yet. Trying to tune.

02-29-2004, 09:01 AM	#8
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	Oil in intake I too have a lot of oil in my upper intake runners. In particular number 5. I think that my pcv letting way too much through and on my GT40 intake, the way the vacuum tree runs underneath the plenum it seems to be pulling in a lot in number 5. In fact , it may be the reason I am fouling number 5. It is wierd that it is bad in just one cylinder, but the vacuum tree position makes it look like something worth checking out. After checking valve seals, compression, etc, it seems that the oil is too high in the runner (in the upper runner!) to be a problem in the head. I run one moroso breather on the passenger side vc. I also have a Melling high-volume oil pump and my oil pressure is seldom below 60 psi. And yes, I gotta clean the area every month because of oil vapor. I think you are on to something, and I have read that there is a particular motorcraft pcv that should alleviate the problem. I think that is what XLR8R was talking about. __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

03-03-2004, 10:04 PM	#9
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	Something interesting you can try (that i've done on higher mileage cars) is take off the oil cap and rev the engine a little, you can sometimes get an idea of how much blowby your getting by seeing it coming out the oil filler. __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)

03-03-2004, 10:23 PM	#10
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	Filter... I actually put three feet of 3/8" vacuum hose between my pcv and the upper intake manifold vacuuum tree. About 8 inches before the manifold connection, I put a clear fuel filter with a paper element in it. Holy *****. I couldn't believe how much oil is getting by in vapor form. I cleaned out my upper intake manifold which was filthy. Only bad thing is, I'm still fouling number 5. Did ANOTHER dry compression test 5-108 PSI 6-108 7-112 8-118 these were off of it cold. I still have no smoke ever. Anyway, I am convinced that it is a blown head gasket or bad oil control ring on number 5. I just have to figure out three days that I can take my car out of service to tear it down. Then, might as well make a 331 out of it right? __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

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