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Engine breather?


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#16 P91MER

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Posted 30 December 2004 - 12:39 PM

Doh, i want some front tear drop mounts..

**Goes off in a strop.


Rich

#17 Jordie

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Posted 30 December 2004 - 02:48 PM

Sorry....

#18 Dan

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Posted 30 December 2004 - 06:37 PM

There is always a small amount of water vapor in the crankcase. Blowby gas is basically exhaust which is mostly water vapor. It also comes in through the rocker cap. As Siggy said, you get more emulsion in the breathers in the winter because the air is damper and the car takes longer to heat up so the water condenses out of the air whilst it is inside the breather cans. So the company who built the car decided a positive crankcase ventilation system was a good idea to suck all this crud out of the crankcase and burn it off. Then you decided to disconnect it and surprise surprise it doesn't work any more.
I assume you did re-tune the carb after disconnecting the breather line, as if you didn't it would be very easy to blow a hole in a piston because it massively leans out the mixture if you don't plug the line.

#19 Jordie

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Posted 30 December 2004 - 06:39 PM

Yes i tuned the carb again and it runs alot better, without the breather. The carb end is blocked off with some petrol pipe and a screw.

#20 hatchet

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Posted 14 January 2005 - 11:40 AM

Hi everyone.

Just been reading this with interest. Will short distance running in winter months produce this emulsifying in the rocker cover also? Went to top up my oil and low and behold nice creamy stuff inside. Checked coolant level, which if fine, last topped this up a couple of months ago and only by a small amount. If it isn't a coolant leak, will a good long run sort this out?

Cheers for your help.

Abbo

#21 Dan

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Posted 14 January 2005 - 09:57 PM

Yes, if you run it up to temperature and keep it running for another quarter of an hour or so it should blow out the crud. Don't drive far though (I would probably keep it on the drive myself) in case there is a head gasket fault which could develop into a serious gasket failure, so keep a close eye on it. If doing this clears it up then all should be fine, if not then you probably do have a small coolant leak. Make sure the oil filler cap is relatively clean first though, if it hasn't been changed in a while get a new one. The filler cap is a service part and should be changed every so often.

#22 hatchet

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Posted 14 January 2005 - 10:09 PM

Nice one.

Cheers Dan

#23 SCURVY DOG

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Posted 15 January 2005 - 01:07 AM

if you dont block off the pipe where the breather hose goes on to the carb you are sucking air in which can cause you to run leaner than normal or the mixture has to be richened to compensate

when the pipe is fitted it makes a sealed system sending any fumes back through them engine to be burnt off

you should either conect the pipe or blank it off not leave it open

if you put you finger over the end of the pipe on the carb you will see the difference in the engine revs


block off the pipe on the carb with a short bit of pipe with a bolt to blank it off you will properly have to weaken the mixture as will than run richer

i always run my carbs like this and the car always runs better




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