oil catch can

Post by **RGN-81** » Mon Feb 23, 2009 5:19 pm

i just fitted a denco turbo to my 105 and am getting a little bit of oil in the vac side of the intake a mate who is a fitter said its normal and to just put a OIL CATCH CAN/TANK on the rocker breather then back to same position is that all that it's needed

cheers

Post by **beinthemud** » Mon Feb 23, 2009 5:25 pm

cut the return hose from the rocker coverto the turbo , put a catch can near the rocker cover end, cut the end near the turbo put a bolt in it with silicone on the thread (helps seal it) put a hose clamp on and your done

Post by **Z()LTAN** » Mon Feb 23, 2009 10:28 pm

u do realise for it to be a true PCV the rocker line has to go to the catch can, then to the intake side... Otherwise its not going to do much...

Post by **RGN-81** » Mon Feb 23, 2009 10:38 pm

i don't know if you were talking to me or the other fella but yeah i know its got to go between the rocker cover and the intake , i am gathering that it dumps the oil in the catch can on the way through.
is there a proper one i need to run or will any catch can/tank do

cheers

Post by **tweak'e** » Tue Feb 24, 2009 7:07 am

beinthemud wrote:cut the return hose from the rocker coverto the turbo , put a catch can near the rocker cover end, cut the end near the turbo put a bolt in it with silicone on the thread (helps seal it) put a hose clamp on and your done

breather has to return to inlet otherwise its no legal in AU.

some motors can blow out so much oil it pays to have an oil return back to the sump.

have a look at what the surf guys make as the 2.4 blow out huge amounts of oil via the breather.

btw catch cans are useless, they need a filter of some sorts in to catch the oil.

Post by **beinthemud** » Tue Feb 24, 2009 4:48 pm

they dont need a filter on the top as the oil is to heavey and sinks to the bottom of the catch ,air escapes out after seperation, i do run this on my car yes not returning to the intake side technicaly brakes the law so do alot of things

Post by **beinthemud** » Tue Feb 24, 2009 5:02 pm

alot of catch cans have a plate inside them over the intake hole that stops the direct exit of oil

Post by **RGN-81** » Tue Feb 24, 2009 5:06 pm

a mate said a lot of truck owner's run the rocker breather in through the chassis and let the little bit of oil run through it. but i reckon i will run the catch can/tank by the sound of it , i don't think it can hurt anything (i hope).

cheers

Post by **beinthemud** » Tue Feb 24, 2009 5:23 pm

anyone know how to put a pick on here

Post by **beinthemud** » Tue Feb 24, 2009 5:28 pm

Post by **tweak'e** » Tue Feb 24, 2009 5:31 pm

when i said filter i didn't mean one of the catch cans with a filter on the top. the problem is a lot of the oil mist is generated by oil squirters in the block. that oil mist can be so fine it doesn't drop out and blows straight through a catch can. you need a filter medium inside the can to catch the oil.

having the breather open to air is an easy defect to be picked up on. also it tends to let oil spray in the engine bay.

older big rigs often vent straight down to the ground. you only have to look at the oil sprayed all under neath the motor.

please don't vent the breather on to the road, there is enough oil and crap on the road as it is. its no biggy to connect back to the intake.

Post by **beinthemud** » Tue Feb 24, 2009 5:39 pm

havent had any oil in the engine bay but could happen if you have realy bad blow by which i kind of do .but returning it to the intake can be worse as it just allows oil to be put in to the intake and if its turbo compressed and pumped in to the engine and well boom

Post by **beinthemud** » Tue Feb 24, 2009 5:42 pm

and if they were going to defect me im sure they'ed find more than that if they were that keen

Post by **SIMMO84** » Tue Feb 24, 2009 5:47 pm

Trucks still vent to the road, if i was worried about mine id do it too. the little bit coming out of a few 4bs is nothing that comes out of thousands of trucks every day.

Post by **beinthemud** » Tue Feb 24, 2009 5:52 pm

mines not at that point yet ,good way to keep the underbody from rusting i guess

Post by **RGN-81** » Tue Feb 24, 2009 5:55 pm

yeah its not a great deal of oil , i only noticed it because i was doing a service on it and noticed they overtightened the bottom clamp(stripped it) and a bit of oil was on the turbo i then went and put some flash clamps on it

Post by **beinthemud** » Tue Feb 24, 2009 6:06 pm

i took off my intake pipe( turbo to engine) and had oil in it ,traced oil to that return pipe and that was the end of that pipe .my mates hilux was the same im only guessing toyota didnt intend this to happen

Post by **SIMMO84** » Tue Feb 24, 2009 6:33 pm

Most turbo diesels do it from the factory.

Post by **tweak'e** » Tue Feb 24, 2009 6:42 pm

SIMMO84 wrote:Trucks still vent to the road, if i was worried about mine id do it too. the little bit coming out of a few 4bs is nothing that comes out of thousands of trucks every day.

modern trucks have filters on the breather and vent back to the intake. all due to emmsion rules. small diesel manafacturs have tight wallets and leave the filters out.

Post by **SIMMO84** » Tue Feb 24, 2009 7:27 pm

tweak'e wrote:
SIMMO84 wrote:Trucks still vent to the road, if i was worried about mine id do it too. the little bit coming out of a few 4bs is nothing that comes out of thousands of trucks every day.
modern trucks have filters on the breather and vent back to the intake. all due to emmsion rules. small diesel manafacturs have tight wallets and leave the filters out.

Ummm....... like what?

Post by **fester2au** » Tue Feb 24, 2009 8:08 pm

If you are going to bother doing it at all then why not do it right and neatly in the first place. Get someone to make you a proper tank, one that you can add medium to before sealing. There are fancy multi chambered designs around but all you really need to do is fill the tank with stainless steel wool, scotchbrite material or the foam that comes on some of the double sided scotchbrites you see in the supermarket. Then you can vent the tank back to the inlet tract where the original pipe went and be confident you are getting negligible oil vapour back into the engine. Then plumb a fitting in the bottom of the tank to drain the oil back to the sump. Most tee into the turbo oil return if you do not have ability to put a dedicated fitting into the sump.

And as a motor bike rider as well as 4wder I thank all you lazy folk who are venting you oil to atmosphere and subsequently our roads. As if our road systems aren't crappy and dangerous enough already.

Post by **dogbreath_48** » Tue Feb 24, 2009 8:27 pm

What's wrong with having the oil vapor going to the intake?

Post by **fester2au** » Tue Feb 24, 2009 8:35 pm

If you're getting a lot it can affect air/fuel ratios, you can be burning up a heap of oil that you could be retaining, there's a possibility a diesel could run uncontrolled on that oil, it can coat the insides of an intercooler if you have one reducing it's thermal efficiency and probably a number of other reasons that don't ome to my mind readily.

Post by **beinthemud** » Tue Feb 24, 2009 8:45 pm