Wow, I can't believe I missed this thread. I'll be throwing mine in the next weekend I get some time. Thanks for all the great info.

 

Yeah I just came across this thread. I'll be doing this soon. Great cheap DIY.

 

(I don't have the mod yet) but just wondering...

I was thinking about doing this but when I checked the TB the other day there was ZERO residue...it looked brand new. Given, I've put 1k of fairly hard miles on it since the last cleaning, should I be seeing residue by now?

 

This mod doesn’t do anything for the TB… its to prevent oil from entering the intake manifold… if you remove your plenum and see oil pooling up in the channels of the lower collector (which I’m certain you will) that is what this gets rid of.

As for you TB (entirely different topic, but...) – the only thing you’ll find there is carbon build up… if you don’t use the coolant bypass mod, the TB should stay pretty clean… however, having no coolant flow to heat up the TB seems to promote carbon build up (mine was filthy last time I took TB off – the muck went 3”+ into the plenum neck).

 

how will it work if you don't use the filter?

 

The oil vapors enter the bowl and once it hits the surface it liquefies and pools up at the bottom… you are only trying to catch oil not filter anything… the filter only impedes the air flow.


There are aftermarket catch cans that have baffles, which will probably do a better job at retaining the vapors and not let any (or as much) exit through the outlet back to plenum... I am in the process of modifying a bigger can (aftermarket) by sending the inlet side down farther into the can so there is less chance of vapors getting sucked back to the manifold on the outlet side before hitting the can.

Anyway - this DIY can is a decent alternative to the aftermarket ones, but has its drawbacks. One thing I'm not too keen on is that the inlet and outlet directly oppose one another so some of the vapors are definitely exiting almost as fast as entering - but it’s better than nothing.

I took off my upper and lower collector this past weekend and was kinda surprised to see so much oil in pooled up on top of the lower collector... I have been using this DIY catch can for quite a while and it fills up quick so I know it is helping some - but there are better alternatives.

Again, it's better than nothing and it's cheap – so I recommend (FWIW).

 

Good points OCG. I'm suffering from the same thing. Is there a cost effective alternative which is larger, to minimize the times that drains are needed but fit in the same location? Internal baffles would also be a plus.

 

might have to do this

 

There are lots of bigger catch cans out there, but none that will fit in the same location as this one… most ppl mount to the fender side kinda between the radiator overflow and the power steering reservoir… I have an NRG can, but lots of companies make them – southbayGsedan (Darren) got a really, REALLY cool one (I would use it) but I forget the name… the Arc can (which has baffles) mounts over the radiator (omitting the intake duct/snorkel).

BTW - al the alternative cans are much more expensive - $50-$100+ plus the cost of hoses and fittings (if you dont use the ones that come with the can) - braided hoses and AN fittings arent cheap. That's one of the benefits to this DIY can, it's cheap and works pretty good.

 

anyone ever use this. seems fairly inexpensive

http://www.frsport.com/Circuit-Sport...c-_p_1511.html

 

Hey I went to go buy the air compressor filter from home depot today and they were sold out of whatever they had.

So I was checking out the CS oil catch nmswong pointed out and I was wondering if it had baffles and would fit our tubes.

But the one thing i noticed when I was looking at the user installs for the CS catch can was Maybe that might help with catching oil in the makeshift catch can? Let me know what you think.

 

Its been discussed many times… the main concern would be bits of steel particles potentially breaking off and entering combustion chamber… on a bigger can the threat isn’t as much of a concern (IMO), but on this little one I think It’s more likely and not sure its worth the risk.

FWIW the oil pools up a bunch on this can – once the oil vapors hit the surface they liquefy and puddle at the bottom… there is probably some vapor that gets by, but I don’t know if any kind of media is going to prevent that because the inlet side blows directly at the outlet – so no matter what, there is probably going to be some vapor returning to the plenum.

 

Question, can we put a filter on the lower to open atmosphere then cap off the pipe on the LP?

 

I got all the parts from home depot and autozone, so Im ready to do the mod. Im just wondering though, should I buy another set and do the mod on the small hose that connect to the intake tube as well?

Im thinking about doing the TB coolant bypass mod too. I live in Houston TX, so freezing is not an issue, but can anybody else comment on the carbon duildup on the TB?

 

I've been using this for about a year. Had my engine replaced about 10 months ago for the OC issue so I've been using the catch can since this engine was new.

Replaced my oem plenum today and found about 3 drops of oil in one corner of the lower plenum so this definately works. I have to empty mine every other weekend. If you let it fill to the top you will be sucking in oil and defeating the whole purpose.