blow by??????

[sydwayz]

so i have recently installed my fully built ca and put a lil over 1500 miles on it the car hauls all the way to 6000 rpm then this is when it all goes wrong anything after 6000 im getting alot of oil i mean alot of oil out of the breather on the exhaust side valve cover what the hell is going on? i know for a fact that the rings are in right what else could cause this? im freakin out

[bentvalves]

What has been done to the motor first off, and are your breathers venting to atmosphere?

[sydwayz]

heres what i spent to get my car to runpistons, je 600rods, pauter 800cams, tomie 500valve springs, tomie 300valve retainers, jun 300cam gears, tomie 100head gasket, cometic 120bearings, acl 120timing belt, power enterprise 140head studs, arp 110injectors, umm.... 550cc 200clutch, clutchnet 500turbo, t25 bb 500water pump 20oil pump 150intercooler and piping 250b.o.v tial 100apexi safc neo 300apexi itc 200hks vpc 300gaskets and seals 150machine work 500

TOTAL--------------------------------6220.00

i built the motor myself so labor was PRICELESS

the breathers on the intake side valve cover go to their stock locations and the one on the exhaust side goes to a catch can and will fill up and over flow in 1 single pull as long as i go over 6000rpm

[float_6969]

I hate to say it, but you've got toasted rings, or a cracked ringland or something. That is A LOT of blow by.

The only other thing that might cause that is REALLY bad over fueling.

[bentvalves]

wai wai wai wai wait, a fully built motor with an apexi NEO controlling it all?

you spent that much on its heart, now time for a PFC or Haltech to control it all.

Start with a compression test.

Greg

[Buddyworm]

I had a brainwave while reading about RB's on another forum; RB engines are notorious for bad head drainage and as a result when you really give them the beans they pump a lot of oil in to the head which can spin bearings AND fill up catch cans.

I'm not the most knowledgable about these engines but from what I've read they're essentially RB's with two cylinders chopped off. Seeing as the CA is similar in design to an RB I wonder if the head also has the poor drainage issues... Especially seeing as you've got a brand new oil pump in there.

I'd say do a leakdown test to see if your rings actually are gone. If not start looking into something like this:



or,

[sydwayz]

umm buddyworm what the hell and where can i get that. ks13 ive got a neo doin it all rite now cuz my guy is running 12.6 1/4 miles with 550's and it is handling it great hes about to put in 750's , he maxed out the 550's so i guess ill c what happens to his first but i know i need to step up and get a real management system. float_6969 u said what i didnt want to hear but that is what it sounds like i know i just dont wna believe it . im taking the car today to go do a compression test and a leak down test hopefully i get a better idea of whats going on

[Buddyworm]

First one I have no idea, second one looks the easiest. Just drill and tap holes for the fittings to drain oil better.

[sydwayz]

so i did a leak down test and all 4 cyl were above perfect and i would have done a comp test but the tester was broke. while i was sniffin around i found that the hose on the back of the intake side valve cover, that goes to oil filter was kinda like half way kinked, not a full kink but a partial kink im assuming this hose is a drain hose but im not certain but if it is and i fix it im thinkin it will solve everything. am i right or wrong?

[float_6969]

I don't think it's a drain so much as a ventilation tube to transport the crankcase gasses up to the head. I could be wrong though. It certainly couldn't hurt to fix it.

I didn't think of the drain back problem, I haven't heard anything, but the UK guys would know better than us. I'll do some research and see what they've got to say about it. If it is a drainback problem, that COULD give you the symptoms that you're describing.

[themadscientist]

two freinds of mine with crazy RB26s have that mod. I can't remember why they do it again, I could check.

[sydwayz]

if it is a drain tube and i t'd the breather im having probles with into it would that solve my problem? the only other thing that could restrict the flow of oil from the head to the oil pan would be the cometic head gasket but i have never heard of any problems like that? are the drain holes in the cometic gasket smaller than stock? if im not getting blow by then this seems like the right track to look into right? damn im screwed! holy crap here we go if that tube is a ventalation tube from the crankcase to the head and its kinked it wont be puttin pressue into the head to force the oil down into the crankcase so since its kinked the head is draining slowly and im reving it and putting oil into the head faster than it can get rid of it so then it comes out of the breather at high rpms? yes no mayb idk

[float_6969]

OK, I did some research.

The tube that comes down from the intake cam cover if the ventilation tube for crankcase. It moves the gases up to the head so that the PCV system can remove them. If you don't have the PCV system hooked up properly, the gasses can't up up that tube like they're supposed to, and so they start coming up other places, like the oil drains. This keeps the oil from draining back into the block like it should and causes problems. If that tube is kinked, it very well could be causing the oil to pool up in the head and give the blowby problems you're describing.

Also try and place the catch-can HIGHER than the valve covers.

[sydwayz]

this shiznit sounds like it will work i hope, ill find out tomarro thanx ill keep ya posted

[bentvalves]

yea is your PCV valve funtioning properly or bypassed?

I welded mine shut and thats a no no.

smoked like a mother****er idling, once that suction got created wherever it was, it kept smokin. I had my exhuast side cover and intake cover routed into a cranckcase evac system that goes to the exhaust.

running the intake breather back to the PCV per factory solved my problem.

Greg

[turbo-sil40]

I have a quetion is the breather hooked up to the intake on the turbo, b/c mine was and it pulled oil to so I just cut a piece of hose about 2 feet long and routed out behind engine to the ground no more oil problem and it doesnt effect anything because it is just a breather.

[sydwayz]

no its not turbo sil40. ks13 i just installed a new pcv yesterday just cuz it cheap. float_6969 i fixed that tube and it didnt seam to fase it im runninng out of options now ive got a massive coolant problem im just losing it

[Liquid_Neon]

you know, my det was spitting oil and sucking coolant till the belt broke. I had done the headgasket only recently too. I am going to take it apart soon since it neds to be inspected for bent valves. I suppose ill find something else while im in there.

[turbo-sil40]

All that money invested and it doesnt run well that must suck

[sydwayz]

yeah im definitely depressed about this **** rite now