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MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG TD TF 1500 - Venting aluminium valve cover

I'm fairly convinced that some of the oil on my garage floor arrives there via the breathable oil cap on my TF's valve cover (aluminium, ribbed type with no breather connections).
I'm toying with trying something like the attached and piping it into the back of one air filter (Stellings & Hellings). This is a Volkswagen oil cap extension ~ threaded while the present arrangement takes a bayonet type cap, so some fiddling would be required.
Has anyone any experience/suggestions for more venting to the top of these engines without drilling holes in the valve cover?
Thanks
Steve
TF7873



Steve Gee

Steve,
You lost me @ "without drilling holes in the valve cover" !
That is what I did to my aftermarket VC. I had a "vent cap" on it for years...and yes it still leaked.

FWIW/IMHO: I had run the car for 12+ years with the S&H air cleaners that were on it when purchased. This year I "made" K&N filters for my Vokes and attached a breather tube to the air cleaner. I am now a firm believer in what others have said on this BBS about the S/H restricting the flow on the carbs. Car runs much better. I should have done this a long time ago!

Concern with venting the "cap", (if I understand you correctly), ...Is it going to clear the bonnet? I barley have enough room to remove the filler cap on my aftermarket V/C.
David Sheward

Thanks David.
Info on your K&N set up would be appreciated ~ Steve.Gee@sympatico.ca
I'm sure what I have can be improved upon.
The picture shows a oil cap extender with a breather tube adapter on the side that I'm thinking could be vented to the air filter, an alternative to drilling holes in the valve cover.
Steve Gee

Steve,
Not sure if this will work:
http://www2.mgcars.org.uk/cgi-bin/gen5?runprog=mgbbs&mode=archiveth&archiveyear=8_2012.dat&access=&subject=8&subjectar=8&source=T&thread=2012021720184719489

If not search archives (2012) for:
K&N Filters for Volks AC ~TF~

Are you running aftermarket tappet cover also?
There was a recent thread on stopping the leaks from ven't on those as well.
http://www2.mgcars.org.uk/cgi-bin/gen5?runprog=mgbbs&mode=archiveth&archiveyear=8_2012.dat&access=20972892200012&subject=8&subjectar=8&source=T&thread=2012030916584910820

search archives (2012) for:
Stopping the oil leak on the Moss tappet cover
David Sheward

BTW: Yes, I spelled it wrong on the thread!
Volks should be Vokes.
David Sheward

For Mort!
David Sheward

Thank you David,
That is the one I was looking for. Some very good ideas here. Time to get dirty.
Mort
Mort Resnicoff (50 TD-Mobius)

In the interests of reducing crankcase fumes into the atmosphere and drawing a slight vacuum on the crankcase I retrofitted a Smiths FVP2003/11 crankcase breather valve to my TD. This is essentially what is fitted to my 1969 Austin America and many other British cars circa the 1960 including MGBs. My car uses the accessory aluminum valve cover and tappet cover. I reduced the forward tappet cover breather to a small orface and plumbed the rear breather to the PCV valve which is connected to the intake manifold via a chromed copper pipe and hoses. Seems to work quite well and reduces the drip from the rear crank scroll due to the slight vacuum applied to the crankcase.


John Quilter (TD8986)

And the view of the installed Smiths valve.


John Quilter (TD8986)

I agree with John, I also have a PCV valve (Ford Pinto)and a flame trap (Land Rover Discovery) on mine going to the inlet manifold and it reduced a torrent to a trickle. Everything else is plugged off so in effect you draw in air through the leaky places and have negative crankcase pressure. I measured -12mbar at idle with a U-tube. It's a cheap solution to a major problem.
Declan


Declan Burns

John Quilter,
I am considering your solution and have a question about your set up.
Your first picture shows a pipe coming out of the breather port. There is a section about 6" long that has an increased diameter. Could you explain that section to me either here or via e-mail.
Thanks,
Mort
Mort Resnicoff (50 TD-Mobius)

Mort Resnicoff: The increased diameter section of pipe contains a piece of copper wadding similar to what you can buy for cleaning. The purpose of this is to act as an oil screening device. I attempted to replicate what the BMC factory set ups had which was usually attached to the front tappet cover or to the timing cover. This section of pipe was cut from a large roll of pipe at a plumbing supply store. Conveniently it had a perfect arc to suit the installation on the engine.
John Quilter (TD8986)

This thread was discussed between 13/05/2012 and 07/11/2013

MG TD TF 1500 index

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