Vinny's Westie Posted November 12, 2004 Posted November 12, 2004 Hi everyone, Newest member (12/11/04) wants help. What do you do with the breather pipe on a 2.0 Zetec, converting CVH to Zetec and one of many questions i need an answer to. Thanks all. Vinny Quote
Blatman Posted November 12, 2004 Posted November 12, 2004 Which breather pipe? I thought there were 2... Quote
perksy Posted November 12, 2004 Posted November 12, 2004 One from the Crankcase and One from the Cam cover Quote
Blatman Posted November 12, 2004 Posted November 12, 2004 And I think like a crossflow, crank case to cam cover, and cam cover to catch tank. Keep the two breathers in the cam cover as far apart as practical... Quote
Vinny's Westie Posted November 12, 2004 Author Posted November 12, 2004 Which breather pipe? I thought there were 2... Main issue is the one on block, but now you mention it , where to put the rocker cover breather as well. Quote
Blatman Posted November 12, 2004 Posted November 12, 2004 So, unless anyone (like a Zetec expert...) can come up with a reason not to... Feed the crankcase breather in to the cam cover. Feed the cam cover breather to a catch tank. Put the catch tank as high as possible in the car... Quote
Vinny's Westie Posted November 12, 2004 Author Posted November 12, 2004 Cheers all, will give it a whirl and let you know. Quote
Thrustyjust Posted November 13, 2004 Posted November 13, 2004 I put one breather from the head into a catch tank and the one on the crankcase has a 'poppet' valve which opens on vacuum.This won't happen unless you have it running to the inlet side of the manifold,so remove it and trim the undersdie of the valve off.remove valve and spring and then re-assemble.Stick a flex pipe then to the catch tank.I always believe that using all the breathers to clear crankcase pressure,althought Dunnels say only need the head one. Quote
Vinny's Westie Posted November 13, 2004 Author Posted November 13, 2004 Many thanks for all your replies, very informative the link was especially useful, seeing as i will need motor sport licence the vent to atmosphere is definitely not to be done! Quote
7SE Posted November 13, 2004 Posted November 13, 2004 Put the catch tank as high as possible in the car... Innocent question: Why Quote
Jed Posted November 14, 2004 Posted November 14, 2004 Quote (Blatman @ Nov. 12 2004,23:13) Put the catch tank as high as possible in the car... Innocent question: Why So that any oil vapour in the tube that condenses runs back into the engine rather than the catch tank - so I've heard. I'm not sure I'm going to follow this piece of advice though when I do my transplant - I'd rather top up the oil with fresh. Quote
Thrustyjust Posted November 14, 2004 Posted November 14, 2004 I think people are talking about X flows and the position the tank and pipework has to be to prevent filling in 3 miles running.Just bolt it to the back of the passenger footwell.If you use the breather can on the side of the block,it's baffled.The crossflow uses an open breather system,causing blowing oil. Quote
7SE Posted November 14, 2004 Posted November 14, 2004 Quote (Blatman @ Nov. 12 2004,23:13) Put the catch tank as high as possible in the car... Innocent question: Why So that any oil vapour in the tube that condenses runs back into the engine rather than the catch tank - so I've heard. Then the run of the pipe as it leaves the breather is probably more significant than the location of the catch tank, which might be some distance away. Placing a catch tank above the rocker/cam cover is likely to result in an eye-catching bonnet bulge Quote
Blatman Posted November 15, 2004 Posted November 15, 2004 I think people are talking about X flows and the position the tank and pipework has to be to prevent filling in 3 miles running.Just bolt it to the back of the passenger footwell.If you use the breather can on the side of the block,it's baffled.The crossflow uses an open breather system,causing blowing oil. Er, no... The principles for the X-flow breather arrangement are applicable to most 4 bangers. I'll be making the adjustment to match the crossflow theory to my Cossie breather system over the winter. The high mounting of the catch tank is indeed to do with making it more difficult for any escaping oil to make it to the catch tank. However, careful routing of the breather hoses is just a good. No reason why you can't have a catch tank mounted high on the scuttle, but still below the bonnet line... Quote
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