DIY OilCatch Can

[n95k]

Been looking around for an oilcatchcan and figured that it was easier to make one. This was easy and simple, used an old AirCon filter/drier got a lathman to cut it open at the top and then put in a few threads, welded a small piece of flat iron to mount this next to the brake servo (truck is auto, no clutch). Also shortened the input side pipe and retained one perforrated disc to hold the steel kitchen scrubber at the bottom. Total cost $4. Will post some pics once it is painted and mounted. Attached are some pics:-

[NiftyNev]

What size is the internal tube? Looks too small to me.

Nev

[n95k]

It is 1/4 inch inlet and outlet diameter. Do you think it is too small and can cause back preasure to blow the crank seals? guess was if there was backpreasure it would blow the dipstick out first.

Hmmm! do you think that I might have to get a union turned out for 5/8" or 1/2".

[Monster-Mat]

i have a 1 litre aluminum catch can for sale if anyone is interested

[NiftyNev]

It is 1/4 inch inlet and outlet diameter. Do you think it is too small and can cause back preasure to blow the crank seals? guess was if there was backpreasure it would blow the dipstick out first.

Hmmm! do you think that I might have to get a union turned out for 5/8" or 1/2".

1/4" is way to small. I wouldn't go below 1/2" with 5/8" being even better. The 1/4" tube will also tend to get a film of oil and other deposits on the inside further restricting the flow.

Nev

[da SLUG man]

righty dokey... why would i need one of them??


(my mate used to have a coke can to catch oil crom his leaky engine... but think that's possibly a different scenario!)

[n95k]

Ok Nev, there was enough meat on the pipes to bore them to 1/2 inch dia and to add a 1/2" length of alu pipe on the input side.

This is mainly to catch the oil vapour that comes with the blow-by from the crank case. As the engines get more miles compression leakage through the rings valve stem seals etc cause the air preasure with oil vapour, which is fed back to the inlet side, the oil tends to coat the intake pipes turbo, throttle body the manifold and form a greasy layer. Also it combines with the EGR soot and can form even a thick layer on the head intake ports. There are many posts on this in the UK and AUS forums. This gadget is to try and seperate the oil in the blow-by air and feed it to the intake.