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hi guys i have a hg 355..pavtec motor ute...it sufferes a massive amount of crank case pressure causing rear main to leak..It carvuretted on a harrop manifold.. it has two performance alloy rocker covers with two dash 8 fittings facing rearwards to go into catch can.. i have a idea of a pcv valve in the rear but will it suck tooo much oil..all assistance be a help..maybee a fitting on the energy sump and a breather???
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so does your catch can vent to the atmosphere or to the manifold? if its to the manifold as i suspect then that sound like your problem to me
the catch can if properelly designed should seperate the oil from the air and not cause any problems for your motor
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Rank: Member
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Rank: Member
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i thought maybe a breather off side sump mounted up on firewall?
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What makes you think that a "massive amount of crank case pressure" causes the rear mains to leak. I have 2 small blocks, both have leaky rear mains.
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well it blew heaps o oil out the side dash tubes when running... then we restricted the catch can tubes to dash 8 and it seems to be worse so this tells me that there is pressure???
motor is 1200k old
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http://www.facebook.com/?ref=home#!/groups/229658947074051/ pics of the set up?
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does it push the dipstick out due this pressure issue?
Id be doing a leakdown test to isolate potential issues, venting to a catch can with minimum -8 hose should be fine.
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I would be giving it a compression test, may have a broken piston land or ring
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