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Old 07-11-2017, 09:58 PM   #1
PJCooper
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Default Crankcase pressure

Hi all. Anyone had an issue with excessive crankcase pressure and fitted an outlet to the location where a mechanical fuel pump would go. TIA
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Old 07-11-2017, 10:13 PM   #2
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have you got the other breathers? that hole gets well soaked with oil.
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Old 07-11-2017, 10:48 PM   #3
PJCooper
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I have a crankcase breather and have been advised to fit a timing cover breather. I met a guy today who has adapted a breather from for pump area out if a timing cover breather. He said it works well so I just wondered if anyone else had done that.
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Old 07-11-2017, 11:38 PM   #4
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i did use timeing chain breather and crankcase breather and rocker cover breather only,
they where mid camshaft and got proper abuse and never had any problems.
but must say i never ran my dip stick on top line with oil,
thats where the problems start,
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Old 08-11-2017, 08:42 AM   #5
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I presume you are talking about an A series ? If you have the breather on the transfer housing and the timing case and you are still getting excessive pressure then it suggests that there is an issue that needs sorting. First check the breathers you have are not blocked. What sort of state of tune is it ? On big bore highly tuned high revving motors they do fit extra breathers (rocker cover usually) and I believe KAD fit a breather on the old fuel pump mount, the late transfer housing breather fits IIRC
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