Rocker Cover Breather Fittings & Catch Can Setup

[EVO-00X]

I got -8AN in mine. Here's a pic http://4gtuner.com/site/showthread.php?t=15219 . Obviously the rocker cover has to be off the engine when it gets drilled, tapped and welded in. You can just drill them out and use a weld in a bung -AN connection too.

Oh guys, my brother got a dip stick from a Hyundai Sonata the other day. Has a yellow plastic handle on it. The thing has 2 O-rings and snap locks into position on our engines dipstick pipe. Its very TIGHT too so should help against dipstick poppage. I have to really pull hard vertically to get it out! You have to shorten the Hyundai item a tad. What my brother did was put the factory stick next to the Hyundai item, cut it same size, then used a hole punch to mark the E and F positons

The top of it looks very similar to this pic :thumbsup:

 

[milkandoj]

That dipstic idea is a good one. Myself i havent had that problem, yet. See how it goes when i up the boost after these few mods.

Thanks for the replys on the cam cover, just want to do it while its off and didnt want to f up the baffles.

 

[Liberoz]

That dip stick is same as the one on my wifes corolla, also 95 carolla's on auto transmission models have a spring clip n the tranny dip stick to stop dip stick popping out great if you want to raid one for the gsr

Ive run 24psi on the track and never had an issue with dip stick popping out ever, no enlarged fittings on the rocker either, all factory hoses with a Cusco CT9A catch can plumbed in.

 

[soldave]

Oh guys, my brother got a dip stick from a Hyundai Sonata the other day. Has a yellow plastic handle on it. The thing has 2 O-rings and snap locks into position on our engines dipstick pipe. Its very TIGHT too so should help against dipstick poppage. I have to really pull hard vertically to get it out! You have to shorten the Hyundai item a tad. What my brother did was put the factory stick next to the Hyundai item, cut it same size, then used a hole punch to mark the E and F positons

The top of it looks very similar to this pic :thumbsup:

There's one shop in mainland Japan fabricating a metal dipstick holder that mounts onto the alternator (I believe) and maybe something else down there, that will prevent the dipstick from popping out.

 

[EVO-00X]

I dont have an issue with the dipstick popping out, just that the Hyundai item clicked into position a lot better than the stocko one did. Its in nice and tight.

 

[ENGINR]

We'll ask you again about the dipstick popping out thing when you get the 4000rpm limiter removed from your engine and you start boosting your puppy up Rob!!

 

[EVO-00X]

Thats why I changed the dipstick now, before finding out the hard way and getting oil all over my bling lol :w00t:

 

[DOUGMO]

the original ce9a dipstick doesnt have o rings it has a barbed rubber sleeve.
my new one is quite tight in the tube.

 

[Richard]

Why dont you guys just use a cable tie to hold it in? Don't bother with "fancy" o rings....

 

[DOUGMO]

even the old spring trick will do the job well.

 

[milkandoj]

Having a look at the stock hole for the breather (not the pcv valve). Theres not much meat around the hole to go much bigger if its drilled and tapped.

I asked the guy at pirtek if he had any ideas..
*Can only go slightly bigger drilling and tapping.
*To drill a bigger hole out and be able to move it down a bit, use a laive.
*I have to weld a fitting on and drill it out after.

Id rather not have to weld one in.

Anyone put a larger fitting in by drilling and tapping.

 

[EVO-00X]

You can actually drill the hole out bigger and forget about tapping a thread into it as its a waste of time IMO. Buy some Earls alloy weld in bungs and have them welded in. no need for threaded fittings. Cheaper, easier and saves a coupe mm of meat as you dont need to tap a thread in.

 

[milkandoj]

Good idea, ill see how big i can go with a weld in fitting. Even an extra few mm diameter adds up to a much larger area.


Just wanted to avoid welding it so i dont need the cover re-powercoated. Ill get it in there tight and with some hydrolic line loctite to help the seal.

 

[bazeng]

I have a hyundai rocker cover with -6 weld ons already on it if you are interested..

Weld ons are the way to go

 

[Qik-1.8]

does anyone have a photo of a 4g93 oil catch can setup???

 

[Richard]

http://4gtuner.com/site/showthread.php?t=15219

 

[milkandoj]

I have a hyundai rocker cover with -6 weld ons already on it if you are interested..

Weld ons are the way to go

yeah ive seen that for sale bazeng , it was polished wasnt it? I like my red one to be honest.
Plus i recon if i hammer it over the next 3 days and keep my gf away i can have my car done. So i just want to put my rocker cover on.

Almost there.
Finish the battery in the boot, put turbo back in, injectors, swap the wired on the ecu, finish off the fpr.... could do it

 

[Qik-1.8]

richard u have the line to the cam over and between the intake in to one inlet to the catch can. where does that second pipe go that is shown in your pic??? did u leave the other one near the inlet manifold side standard????

 

[milkandoj]

Ok to report back the way i ended up going about it.
Kept the pcv valve, just upgraded the side breather, same idea if you want to remove the pcv though.
No welding or re power coating of the valve cover. Just got to decide if the run black fuel hose or go braided, either fittings required can be screwed onto the -8AN side.

I bought a 1/4 inch NPT to -8AN adapter. Cost a tiny $7.50.

Gently, drilled and tapped out the cam cover to suite the 1/4 NPT fitting. (bloke at pirtek did it for a chat, saved me buying a 45 buck tap for one hole).

Drilled the inside of the smaller NPT side out to 9.5 mm to match the internal diameter of the -8AN side.
So I'm running the same internal diameter as welding on a -8AN fitting. Without having to weld it on and re powder coat the valve cover. With a 1/4 inch NPT fitting tapped into the valve cover.
So i can add a push on hose fitting or maybe braided -8 lines later.

Go nuts blowing the shavings out of the baffles.
Screw it in with some hydraulic line thread sealant.



Old verses new.....
The internal diameter is 9.5 mm rather than 5mm of the original fitting and the sharp 90 degree bend is taken out and can be replaced with a smoother larger -8AN bend for the hose, that will be screwed on later.

I remember when looking at wire gauges, small jumps in internal diameter give big gains in area.
So i plugged in the radius of the new hole (4.2mm) verses the old (2.2mm). into the area calc for a circle.

Internal area of old fitting- 15mm^2
Area of new fitting= 52mm^2

 

[EVO-00X]

Good work mate! Yeah its amazing how much flow increases with just a small change in diameter. Same princible goes for throttle bodies too