Trapping Oil Before Enters Air Bridge
11-13-2005, 11:58 PM
#1
Team Owner
Thread Starter
Trapping Oil Before Enters Air Bridge
I have a AMW catch can and it works great. I checked the inside of hose to the manifold with white kleenex and NO signs of oil.
But I checked the hose from the valve cover where it enters into the air bridge (was plumed in there because I have the LS2 throttle body) and there WAS oil there.
I believe oil is sucked from hose to valve cover vent as air passes thru air bridge. Is this correct?
Is it ok to put a filter in this line. Can it be routed thru the catch can some how??
I don't want anymore oil getting in
DH
But I checked the hose from the valve cover where it enters into the air bridge (was plumed in there because I have the LS2 throttle body) and there WAS oil there.
I believe oil is sucked from hose to valve cover vent as air passes thru air bridge. Is this correct?
Is it ok to put a filter in this line. Can it be routed thru the catch can some how??
I don't want anymore oil getting in
DH
11-21-2005, 07:03 PM
#5
Melting Slicks
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Howie! You can take a look at my new second generation system Saturday on the V-Dude run. If you like what you see you can copy my design and your oil problems will be solved 
.
.
11-21-2005, 07:30 PM
#6
Safety Car
Well it is probably not unusual. I think the only reason they run that line into the bridge is so it does not vent the crankcase to atmosphere. When I had the FAST/Ls2 I used the LS6 valley and the can as you have, and left the right valve cover port as a vent under the coil cover ( put a short piece of hose on it with a walnut sized filter). So the catch can is creating a vacumn and the valve cover pulls a bit of air as vent.
Worked fine. Lots of guys use a valve cover breather. Alternately, you could just leave it as is, in that the majority of the flow is going thru catch can.
For what ever all that is worth?
Worked fine. Lots of guys use a valve cover breather. Alternately, you could just leave it as is, in that the majority of the flow is going thru catch can.
For what ever all that is worth?
11-22-2005, 01:46 AM
#7
Team Owner
Thread Starter
Originally Posted by frank dupuy
Howie! You can take a look at my new second generation system Saturday on the V-Dude run. If you like what you see you can copy my design and your oil problems will be solved .
.
11-22-2005, 01:53 AM
#8
Team Owner
Thread Starter
Originally Posted by see5
Well it is probably not unusual. I think the only reason they run that line into the bridge is so it does not vent the crankcase to atmosphere. When I had the FAST/Ls2 I used the LS6 valley and the can as you have, and left the right valve cover port as a vent under the coil cover ( put a short piece of hose on it with a walnut sized filter). So the catch can is creating a vacumn and the valve cover pulls a bit of air as vent.
Worked fine. Lots of guys use a valve cover breather. Alternately, you could just leave it as is, in that the majority of the flow is going thru catch can.
For what ever all that is worth?
Worked fine. Lots of guys use a valve cover breather. Alternately, you could just leave it as is, in that the majority of the flow is going thru catch can.
For what ever all that is worth?
AND.....thanks for replying!!!!!!!
DH
11-22-2005, 06:38 AM
#9
Safety Car
There is a vacumn created at the air bridge which pulls from the valve cover. The 04 valve covers have no port. GM fianally gave up on the PCV from the valve covers maybe you should too?
11-22-2005, 09:20 AM
#11
Safety Car
This just happened to me over the weekend on my H/C/Fast 90 setup. I spoke to Mike Norris who did the work and he said no problems with using a catch can on that line.
11-22-2005, 05:35 PM
#12
Team Owner
Thread Starter
Originally Posted by dmtnt
This just happened to me over the weekend on my H/C/Fast 90 setup. I spoke to Mike Norris who did the work and he said no problems with using a catch can on that line.
DH
11-22-2005, 08:21 PM
#14
Team Owner
Thread Starter
Originally Posted by screw991le
Just use a 3/8 oil filter like this, but put it on the valve cover line
I see you found this thread. Thanks for confirming that this is a good idea.
Is that a fuel or oil filter.???
DH
11-22-2005, 08:30 PM
#15
Drifting
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I have a 98 and the pcv system works perfectly, I use no oil between changes, ok maybe 4oz in 6000 miles, no oil in the intake or airbridge. Why did GM change it? If it aint broke leave it the flip alone. They did the same thing in 01 putting low tension rings in and creating a world of problems with oil consumption.!!!!!!!???????
11-22-2005, 08:38 PM
#16
Safety Car
Originally Posted by Dirty Howie
So do you have 2 separate catch cans??? I assume you have one for the valley to intake manifold line.....
11-22-2005, 09:06 PM
#17
Team Owner
Thread Starter
Originally Posted by dmtnt
No, I've found hardly any oil in the can plumbed into the pcv line so I'm returning it to stock. I'm going to run the line from the head to the catch can then to the intake.
I get a few teaspoons worth every 500 miles or so with the AMW can. I change my oil about every 3500 miles with no noticable drop on the dip stick.
DH
11-23-2005, 03:55 PM
#19
Race Director
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St. Jude Donor '06-'07-'08-'09-'10-'11-'12
Originally Posted by Dirty Howie
Interesting.....
I get a few teaspoons worth every 500 miles or so with the AMW can. I change my oil about every 3500 miles with no noticable drop on the dip stick.
DH
I get a few teaspoons worth every 500 miles or so with the AMW can. I change my oil about every 3500 miles with no noticable drop on the dip stick.
DH
I get about the same with regular driving
11-25-2005, 12:16 AM
#20
Melting Slicks
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St. Jude Donor '08
Originally Posted by screw991le
Just use a 3/8 oil filter like this, but put it on the valve cover line
Is the filter vented?
Last edited by RJW; 11-25-2005 at 12:18 AM.