MG-Cars.net

Welcome to our resource for MG Car Information.

Recommendations

Parts

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 - Rear crank seal/thrower

On the assumption I stick with the original cork gasket configuration in the rear bearing cap when assembling the crank. Is there any tips to try and get it "right". I've sort of decided this set up because of the mixed reviews on the conversion kit/lip seal.
JK Mazgaj

A while back I fitted a Smiths PCV valve to my TD which was used on MGBs and many other BMC and Triumph cars in the mid to late 60s. It causes a slight vacuum on the crankcase and amazingly my TD is very leak free. I only wish I could get my Morris Minor to be the same.
John Quilter (TD8986)

John (or anyone else who has put one in), do you have a picture of your PCV setup? Or if not, a detailed explanation of where it goes, what it connects to. Understand somewhat the use but not sure of how to implement one.
The other piece of information is that I don't have the single original air cleaner setup but the dual "pancake" air filters.
Thanks
Randy
R Biallas

Thank you John. I too would be obviously interested in further details of the Smiths PCV valve installation if anyone can help.
JK Mazgaj

The photos show the system as fitted to my TD. My car has the accessory aluminum tappet cover and valve cover. Stock air cleaner. I blanked off the forward tappet cover vent except for a small orifice. The oil filler cap is threaded thus sealed. The intake manifold is drilled and tapped to take a small pipe fitting that connects to the bottom of the Smiths valve. Since this is not in the middle of the intake manifold I fitted a small tube to distribute the crankcase fumes more evenly.
A series of copper pipes, which I had chromed, lead from the rear tappet vent to the side of the valve. the larger section of pipe is an oil separator section filed with metallic gauze. Won't get you any points at a concours but it seems to work. It will not likely work on an engine with excessive engine blow by.
The design of this replicates what is used on my stock Austin 1300 (America) but configured differently.






John Quilter (TD8986)

My installation is similar to John's. I have a restrictor installed between inlet manifold and the PCV valve. I am using a Wolseley 4/44 side cover.
Regards
Declan


Declan Burns

More drawings. If you need a higher resolution send me a PM.
Regards
Declan


Declan Burns

Thank you John and Declan. Very helpful.
JK Mazgaj

Declan, What is the purpose of the U shaped tube with the water in it? Also the restricter at the bottom of the Smiths valve? I thought this restriction was built into the valve itself.
John Quilter (TD8986)

John,
It is a U-tube manometer for measuring low pressure. I measured -120mm wg (-12mbar)before fitting the restrictor. The idle at that pressure was very eratic. I found out by trial and error what size restrictor was necessary to give a stable idle which was at -50mm wg (-5mbar).
Regards
Declan
Declan Burns

This thread was discussed between 06/09/2021 and 09/09/2021

MG TD TF 1500 index

This thread is from the archive. The Live MG TD TF 1500 BBS is active now.