Afternoon all,

I've seen a few 'home made' cold air intakes done on this particular engine. I'm now planning my own, I've managed to get an apexi cone filter for free so no excuse!

I was wondering what to do about the crank case breather pipe? I don't particularly want to fit a catch tank...

Another question (!) regarding the crankcase breather, I know there's a filter on the side of the engine, if this was blocked or partially blocked would this cause more oil to be forced up into the air filter? Due to the increased crankcase pressure?

Thanks in advance,

Tom

Some people seem to use T-pieces to connect it back into the main intake, others stick a mini cone filter on the end and vent to atmosphere. If that was me, I think I'd see if I could mount it over something to do the oil dripping to the floor.

Not sure on part two, sorry!

Mini cone filter sounds more do-able.

Don't suppose you (or anyone else) knows the outer diameter of the throttle body on this engine? Off the top of your head?!

So I know which piping to get.

No idea I'm afraid, I've only got the same block in the Polo, different top end/internals/TB. Sorry! Should be pretty easy to measure though once it's brightened up a bit?

I just did a very crude measurement, phone light held in the mouth sort of thing and got 62mm.

The filter is 70mm so I guess I need a reduction sort of pipe, I was hoping for an easy/cheap fit!

I wasn't expecting those mini oil breather filters to be so cheap, had a quick google. Do you have one fitted on your engine by any chance?

Nope, mine is totally standard at the minute. Intend to start working on it now I've got the Golf to commute in.

Was thinking of going ITBs at some point, so will need to look into venting it properly then.

62 sounds a little high, I have in my head the figure of 56mm for some reason for the 1.4 16v, but not sure. If you've a vernier big enough then that should be an easy/accurate way to tell. Just slide them across the TB and they'll stay open at the widest point.

I fitted/glued some hydraulic flexi pipe into the the OEM breather pipe and then a 90deg bend fiting into the main pipe between the filter and the throttle plate/valve!

And yes there is an "oil seperator" that is a black plastic box bolted onto the back of the engine low down which "removes" the oil from the vapors before they are passed up the rubber pipe you see. And this does need replaceing evey so often....it can be cleaned out but is very hard to do so!....

These photos show the adaptor/reducer at the back that I did have...which has now been removed as it was causing problems which is why the pipes are pushed inside onanother with a 25mm overlap and hymolar blue sealent!!!

A vernier would be a handy thing yes, that's on my shopping list!

Nice intake there, is there not a fair amount of heatsoak going on with that setup?

I thought the space in the rear right hand side of the engine bay (as you look at it) is just calling out for a cone filter! And then route some ducting around the outside of the battery box?

Wondering if there's an obvious (or not) reason you did it in that orientation?

Not having a dig, just wondering, you seem pretty knowledgable...I read your post about the felicia, project q or something similar. Great stuff!

Where you suggested is where the 1.4MPi (8v), & 1.9 TDis have them, above the ABS pumps.

It's where mine would go if I were fitting one, just rotate that 90^o bend through 180^os.

Edited 14 January, 201214 yr by TriggerFish

A vernier would be a handy thing yes, that's on my shopping list!

Nice intake there, is there not a fair amount of heatsoak going on with that setup?

I thought the space in the rear right hand side of the engine bay (as you look at it) is just calling out for a cone filter! And then route some ducting around the outside of the battery box?

Wondering if there's an obvious (or not) reason you did it in that orientation?

Not having a dig, just wondering, you seem pretty knowledgable...I read your post about the felicia, project q or something similar. Great stuff!

The silver/alu reflects heat...the black flex does absorb some (small amount) but the proper double layer silver stuff ain't cheap!!

I routed it that way to keep the air intake just behind the OEM slot in the slam panel as it high (out of water)...and gets forced cold air in (ram air effect almost)....also I did not want any pipework "ontop" of the engine as this has increased heat soak from the cam cover (these engines give off alot of heat) and I blanked off the stub pipe on the exhaust heat sheild! I also wanted to mount it on the OEM cover mounts as then totally OEM and reversable....and trying to go behind the battery seems to lose a good clean high up flow of cold air! and gettting the pipes back up over the coil pack etc is a no no due to the size of the pipes that I used!!!

Having had the car for 11yrs now I should know a thing or two about them!!!...... ......