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Author Topic:   Puking oil out breathers
posted September 18, 2001 09:50 PM
What covers do you have?? I have used the stamp steel ones and had to open the baffle up so it didnt take 2 hours to fill the oil, but when i did that it allowed the oil to really come out. I solved this by putting socks over the breathers to keep the oil from running all over the places. They last about 4 or 5 races befor they are totaly soaked. Do you have the restrictors in it???

posted September 18, 2001 10:43 PM
one other thing is that you could be getting excesive amount of allky or condesation in the pan that steams out as the motor heats up. Just my 2

posted September 19, 2001 10:25 AM
By adding socks and steel wool??!? to your breathers your just defeating the purpose. They're called BREATHERS right? The problem is that they are already too restrictive (as they almost always are with performance camshafts). The profiles of racing cams don't allow the cylinder pressures and in turn the crankcase pressure to escape out the exhaust. To solve your problem effectively, get a set of baffeled valve cover push-ins from Morosso that allow you to create a vacuum by running a hose into your headders. Morosso sells it as a drag racing part but it is highly effective on oval track cars as well. Your engine will thank you for it.

posted September 20, 2001 10:53 AM
I used to run the craankcase evacuation system on a 4 cylinder years ago. It is amazing how well your oil stays in the motor when using these. There were two times that I had run over something and cracked my oil pan but didn't loose the oil untill I shut the motor off. This was a crack not a hole.

posted September 30, 2001 09:47 PM
i had this problem, and it was pretty bad on my street stock. this is what i did, take a piece of tin or something simaler and bend it so that it stands about 1/4 of an inch of of a table and it has tabs to put bolts. bolt it over the holes on the inside of the valve cover. i had mine to where it covered from about 2 inches on either side of the holes and against the wall. it solved my problem . i could run about 6 or 7 races before any oil showed up on the can check for looseness when you adjust your valves. i hope this made sence b/c im sick and on some medicine.good luck. o- yea, i was able to bend the baffle tabs down on the front vent so oil could go in faster.

posted October 17, 2001 11:23 PM
3x racing has the best answer. not many circle track guys do this. They should.

As far as a quick fix for the breathers ive seen or used a few things. The stainless steel pot scrubers are better than steel wool. Shop rags folded length-wise and zip tied around the breather(same idea as socks).

posted October 22, 2001 07:49 PM
this could also be a possibility.have you been overfilling the oil? it doesnt take too much over full to create this problem espcially without a windage tray ,it is also agreat loss of power and hard on engine

posted November 16, 2001 08:32 PM
Dont use the socks and rags.That is a cocktail of oil and alky waiting to catch fire from the headers.Be careful.Also if you have the hood room flip the cover so the breathers are on the front side this will sometimes cure the problem.

[This message has been edited by Racer111 (edited November 16, 2001).]

posted November 19, 2001 04:56 PM
The only time that i've had this problem is when there is to much blowby past the rings.

posted November 20, 2001 02:31 AM
I had this problem a couple years ago when I ran lean with my first alky carb and blew a head gasket and it filled the oil pan with water. then two weeks later it was puking again because the head was cracked then two weeks later(more oil/water out the breather) the block was cracked between 3 and 5. I would have been better off if it would have just blew up the first night. LOL

posted December 07, 2001 06:15 PM
i'm no expert but i do put together the odd rat motor,so heres a couple of things to think about:
1,do you have baffles in your valve covers?If not you could try a pair of baffled breather grommets(about $5).
2,you could try using oil restrictors to lesen the amount of oil(but this may require machining and wouldn't work with hydraulic lifters).
3,Moroso do a "lifter valley oil baffle" wich keeps excess oil out of the valve covers & stops hot oil hitting the underside of the intake manifold(= cooler air/fuel mix).
4,you could also take a look at fitting a remote breather tank(Jazz products do one for about $45)this seperates any oil blown out into a container which you can drain off later.
As i've not suffered this problem myself i'm only suggesting a few things i might try if i was.Cheers.
Originally posted by mod777:
SB Chev 406 w/bowtie heads and high volume oil pump on meth.
Pukes about a cup of oil out the breathers ( on left side) each race. Really makes a mess! Others say theirs does too, but what I've seen, theirs is just a little condensed oil vapor where mine actually runs out and blows all over the covers, the firewall, the distributor and wires and runs downs the side of the block.Almost as if the valve cover is filling up. Any ideas?

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