My cossie is now back looking like a cossie under the bonnet but we have a query about where the breather pipes go. The top 2 are ok but its the 2 from the bottom we arent sure about. The one on n/s just vents below the car.

Question is where does the o/s one go to? Is it supposed to return to the block?

This is what my mate said "The hose connection looks like ¼” NPT, but the block seems to be ½” NPT"

Now i dont even know what NPT is lol!

So should the breather go back to the block? Does a lot come through there or would we be ok to rig up a small catch tank???

 

No one got an aftermarket breather on a cossie?

 

mate i asked this got me some great advice and told me where all the pipes went, but i cant get the search function to work

 

finally got it to work, (tis a work network prob not PF),

heres the link hope it helps
https://passionford.com/forum/viewto...895&highlight=

 

All I need to know is what this thread is, per the attached pic.

 

just as i load up photobucket you beat me to it lol

 

Did you not have a bolt with a connection for a hose welded on to it?

 

aye i guess its still on the old block so im off to look now...

 

Chop...do not use that hole as a return as it is postively pressurised when the engine is running and oil will NOT drain agains the presure.

Use the hole under the ex manifold as a breather and reutn oil into a catch tank back into sump UNDER oil level

see GGR site for the best breather pics

phone me if you need

 

cheers for that Euan. What would using that hole do then if its under pressure?

i'll try find the ggr site...

 

Lambchop, Im no Expert but I think Euan said Oil wont drain out the breather if you use that hole on the block when the engine is running

 

5/8's bsp normally or is it 3/8's LOL..

 

Chop, drain back to the sump LOL Use both sides as breathers and the cam cover as an air feed

 

sorted chop?

 

drains back to sump perfectly well

 

Oil will drain against pressure

 

Take the pipe off the breather seperator when the engine is idleing and feel the pressure in it...its not much BUT it is there...imagine this at 6k revs...

Oil will not drain down the pipe.

 

my one is in that hole and seems to work fine and know a 500bhp track car which is fine also

 

I have tried both methods on my car and know what works best.

 

euan just how much oil do you think passes round the breather then back to sump? we arent talking about litres here! of course its going to drain down a pipe of that bore!

mines never spewed anything out of the filters and as thats the only return it has i know it drains back to sump

 

mine only breathes either side of block, exhaust side is also the drain

tarcal tank as in pics on ggr site

 

My point exactly mate,

Its only a trickle at most !!

 

I just couldn't see where on earth I was supposed to connect to under the exhaust manifold.
So, luckily Chop took the whole old engine to me and I nabbed the adapter and fit the drain onto the block, as per my Block picture above.

It was because I didn't want oil dropping back under the rear tyres......!!

Is it supposed to fit to some sort of adapter that fits on the sump drain plug? That seems to be the only sensible place to put it, as it's under the oil level and the sump can be drained through the adapter instead of taking off the swirl pot connection also.

 

Rob has got here first but as he says its back into the hole shown above.

Euan
where on earth do you mean mate?! we have no idea! we have the old block sitting there to look at too

 

I was thinking that my self, where else is there?

 

3/8 NPT x 18

And they need to drain into the sump below the oil level....