Understanding Oil Tank, oil lines and Breather
#64
Rennlist Member
I took a stab at a catch can set up following Gus’ lead, but found that this exacerbated oil leaks at my right hand side valve cover. I’m sure it has something to do with the check valve. Seems to me this may be increasing crankcase pressure prior to it cracking the valve open back to the tank, which may be causing leaks.
Thoughts? Wondering if I can just run this set up but without the check valve.
Please excuse the filth and blue zip tie - black ones on the way but wanted to test things out.
I blocked off the two openings pre and post throttle butterfly, and ran those two lines from the tank to the catch can.
Thoughts? Wondering if I can just run this set up but without the check valve.
Please excuse the filth and blue zip tie - black ones on the way but wanted to test things out.
I blocked off the two openings pre and post throttle butterfly, and ran those two lines from the tank to the catch can.
Last edited by revolve40; 06-04-2022 at 10:07 PM.
#65
Rennlist Member
Thread Starter
Join Date: Jul 2003
Location: Peachtree City, Ga
Posts: 1,951
Likes: 0
Received 64 Likes
on
54 Posts
Is the check valve installed in the proper direction. The air flow should be out not in.
it sounds like the direction is in with the valve cover issue. On my car I had a small seep on the front seal, but when I installed the check valve the seep stopped. The one way check valve should create negative pressure within the engine.
it sounds like the direction is in with the valve cover issue. On my car I had a small seep on the front seal, but when I installed the check valve the seep stopped. The one way check valve should create negative pressure within the engine.
#66
Rennlist Member
Yes - if you check my photo the arrow indicates flow, which is from the engine to the oil tank. I’m just concerned that the valve requires a lot of pressure to open, and that pressure builds up inside the crank case.
have you tried this set up without a check valve in the crank case hose?
have you tried this set up without a check valve in the crank case hose?
#67
Rennlist Member
Thread Starter
Join Date: Jul 2003
Location: Peachtree City, Ga
Posts: 1,951
Likes: 0
Received 64 Likes
on
54 Posts
The pressure needs to be on the weak side for the check valve. You should be able to blow it open with little pressure.
no have not tried with out check valve- but should function the same just no negative pressure buildup in crankcase.
no have not tried with out check valve- but should function the same just no negative pressure buildup in crankcase.
#68
Rennlist Member
Given my issues with the previous approach, I went back to stock but with a catch can in line between the intake manifold behind the butterfly and the oil tank. We’ll see if this actually catches any oil.
#69
Your oil catch can looks very professional. May I ask where did you get it and how much?
I had tried this setup before but still found oil in the intake (oil not over filled). Looking forward to hearing from you again for the result.
Cheers
I had tried this setup before but still found oil in the intake (oil not over filled). Looking forward to hearing from you again for the result.
Cheers
#70
Rennlist Member
Wondering if I can run a second in-line catch can there… trouble is finding one with big enough fittings for that large hose without creating a bottle neck in the venting system. Any thoughts would be great!
Last edited by revolve40; 06-25-2022 at 09:42 PM.
#71
Three Wheelin'
More amazing is that you live in Tennesse and don't have air conditioning!!
Thanks for the deep dive into breather lines!
Thanks for the deep dive into breather lines!
#72
Three Wheelin'
I took a stab at a catch can set up following Gus’ lead, but found that this exacerbated oil leaks at my right hand side valve cover. I’m sure it has something to do with the check valve. Seems to me this may be increasing crankcase pressure prior to it cracking the valve open back to the tank, which may be causing leaks.
Thoughts? Wondering if I can just run this set up but without the check valve.
Please excuse the filth and blue zip tie - black ones on the way but wanted to test things out.
I blocked off the two openings pre and post throttle butterfly, and ran those two lines from the tank to the catch can.
Thoughts? Wondering if I can just run this set up but without the check valve.
Please excuse the filth and blue zip tie - black ones on the way but wanted to test things out.
I blocked off the two openings pre and post throttle butterfly, and ran those two lines from the tank to the catch can.
Did you resolved your issue ? Could it be a faulty return valve ?
Thanks
#73
Rennlist Member
I do think, however, that this issue is more directly tied to a tired motor with excessive blow-by vs. a fault in the breather design. I'm just trying to indirectly address my symptoms.
The following users liked this post:
kos11-12 (07-07-2022)
The following users liked this post:
HiWind (08-09-2022)