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MG TD TF 1500 - Aftermarket Bell oil filler cap

Hello,

There is a TF on Ebay now with the same after market valve cover as I have on my TF, but I lack the oil filler cap, which I believe is vented. (See photo) Would anyone of you out there have a spare one of these caps lying around for me to purchase? The correct price + P&P of course.

Although I have installed a breather pipe from the cover to the air filter I might have to blind this off later if I fall into to the super charger trap. And I believe I may do that one of these days. And then I will need the vented cap.

Hopefully,

Jan

TF 1500
HDC46/7481, XPEG 1292

JE Kristoffersen

Jan
"Although I have installed a breather pipe from the cover to the air filter I might have to blind this off later if I fall into to the super charger trap"

Jan you can and should vent the valve cover to the air filter of the supercharger.

Mort
Mort Resnicoff 50 TD (Mobius)

Mort,

OK? I thought that was no longer an option, due to the increased suction and risk of too much crankcase negative pressure, but I stand corrected on this, as I believe you run a supercharger already in your TD?

regards,

Jan
JE Kristoffersen

Almost any local friendly auto parts store stocks this. I got mine at Advance Auto.
-David

D. Sander

David,

No local friendly auto parts store sells this in Norway. You think it can it be purchased through the internet?

regards,

Jan
JE Kristoffersen

I think the oil cap fits a small block Chevy engine. I used that as a search and came up with this:

D. Sander

Jan,
I have not run with this set up yet. I am in the process of installing it now. There was a post recently showing a PCV valve from breather pipe to intake manifold and a vent from valve cover to air filter. I forget who posted it but I saved the photo attached.
I am not an expert but after consulting with a few experienced T series owners this is what I have found;
The supercharger causes greater pressure and temperature inside the engine. Enough pressure in the crankcase will cause more oil leakage at the seals as well as at the breather pipe. Greater pressure in the valve cover will cause oily exhaust from the vent when the engine is in the boost cycle.

My setup will be slightly different than the photo because of the supercharger. I will come off the side cover to an oil scrubber(that is the thicker section you see in the photo). It is a chamber stuffed with a coarse steel or copper scrubbing pad. This will separate the oil from the gases and let it flow back into the engine. The excess pressure in the lower engine compartments not only escapes this way, but is sucked up by the vacuum in the intake manifold. The PCV valve allows this flow. When the supercharger and thus the intake manifold, are in boost mode(positive pressure), the PCV valve prevents flow back into the breather pipe. It's basically a one way valve.
I will run a line from the valve cover to the back face of the air filter and I think I will make an oil scrubber for that also.
I will be glad to post results and photos when I am finished.
Mort

Mort Resnicoff 50 TD (Mobius)

Hi David & Mort. David, I note in the pic you posted that your oil filler cap is at the rear. At first glance I thought you had reversed the original rocker cover but on closer inspection I see is is probably an after market item. As this is the first time I have seen one reversed I was curious, but then I saw the pic Mort has posted. (Hi Mort. I guess you had to install your AM cover that way to place the air filter feed on the correct side.) I'm intrigued as to why you've installed yours like that David? Does this provide some benefit I'm unaware of? Not critical just curious.
Cheers
Peter TD 5801
P Hehir

OK, I'm the guy with the engine in Mort's post. That is in fact an aftermarket valve cover and tappet cover that came on my engine back in 1977 when I bought the car. I've seen them on other T series at shows. My MGB retrofitted Smiths PVC valve works fine on my engine but on a supercharged engine, I have no idea.
John Quilter (TD8986)

Peter,
The rocker cover can only be installed one way. If you look again at Mort's picture you'll see that the mounting studs are off-center.
Joe
Joe Olson

Joe, I now see that the studs favour the carby side of the longitudinal axis which obviously means it will only fit one way.. That answers my query. However I'm still curious as to why both after market rocker cover designers decided to mount the filler cap at the rear of the head? I guess we'll never know
Peter TD 5801
P Hehir

Actually, it is easier to add oil to a filler cap that is on the rear of the block,,, more room and easier access with the bonnet in the open position,,, (not incorrectly folded over and resting on the oppisite side)

SPW
STEVE WINCZE

This thread was discussed between 11/12/2013 and 12/12/2013

MG TD TF 1500 index

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