Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

Go to Thread: Previous•Next
Go to: Forum List•Message List•New Topic•Log In


Bruce Mills
Bruce Mills
Vancouver Canada
(71 posts)

Registered:
11/28/2007 09:31PM

Main British Car:
1974.5 MGB Roadster 3.5 Rover

authors avatar
PCV
Posted by: Bruce Mills
Date: July 12, 2009 10:12PM

Hi

I have a 69 Rover 3.5.
On one rocker cover there is a small block Chevy V8 PCV valve which goes to the vacuum on the carb.
On the other rocker cover there is an air filter which must be to allow filtered air into the block. On this bank is a baffle attached to the rockers. This baffle is NOT under the filter

At the back of the lifter gallery there is a small pipe which was hooked up to something at one time. Oil leaked out of it so I plugged it up.

I am noticing blow by coming from the rocker cover air filter. Basically I am curious why. It should be taking air in and I should not notice any oil blow by in this area? If in fact it is blowing oil out, how does the air get back into the block?

Thanks all

Bruce


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6470 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: PCV
Posted by: BlownMGB-V8
Date: July 13, 2009 12:20AM

Bruce, you will have fumes escaping under throttle. Normally this is dealt with by venting that rocker to the air cleaner housing, with a suitable spark arrester. That way the fumes are recycled.

Jim


Bruce Mills
Bruce Mills
Vancouver Canada
(71 posts)

Registered:
11/28/2007 09:31PM

Main British Car:
1974.5 MGB Roadster 3.5 Rover

authors avatar
Re: PCV
Posted by: Bruce Mills
Date: July 14, 2009 12:52AM

Thanks Jim
Get Your BritishV8 T-shirt by clicking here


NixVegaGT
Nicolas Wiederhold
Minneapolis, MN
(659 posts)

Registered:
10/16/2007 05:30AM

Main British Car:
'73 Vega GT 4.9L Rover/Buick Stroker

authors avatar
Re: PCV
Posted by: NixVegaGT
Date: July 14, 2009 12:14PM

I got a passive evac system for my headers. It has one-way valves that exit into the collector putting negative pressure in the crankcase. Some say this doesn't work well. Some say it works great. Opinions?


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6470 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: PCV
Posted by: BlownMGB-V8
Date: July 14, 2009 04:35PM

Best used with open headers.

Jim


Go to: Forum List•Message List•New User Registration•Log In
Sorry, only registered users may post in this forum.