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MG TD TF 1500 - Mobius meets Frankenstein

OR:
Why I bought stock in a hose clamp company.

I guess I still have enough blow by to cause my breather pipe to spit enough oil out to slime up the bottom of the car. I decided to not put a PCV on the intake manifold and just vent everything into the back of my air filter.

It's hard to see it in the photo but I put an oil/water separator in line to minimize the oil fed back into the carb. I have done it all with clear plastic tubing so I can monitor the system.

I took it for a short test ride yesterday and it seems fine. I will know more about its success as I put more miles on it.

If anyone sees any downside please let me know.
Mort


Mort 50 TD

With your blower also feeding the carb, won't the pressure blow the stuff back into the engine?

Jim B.
JA Benjamin

MORT,
If this system works to your expectations, I would think that a version made out of (shiney) copper pipe and fittings would be more of a "period" type of instalation!

SPW
Steve Wincze

Jim,
I am still wrestling with the pressure in the different components. Below is a photo of the steel wool in the new side cover. It acts as a oil separator. The use of clear tubing for now will show me where the oil is going. Right now I think the commercial oil/water separator I have just before the air filter has too much resistance and today I am going to gut it and replace the filter with some other media.

Steve,
You are correct. I got some of these ideas from a post by John Quitter whose PCV system looks great. First things first.

Mort


Mort 50 TD

Hmmmm why not drain it back into your "spare" oil can next to the battery?
David Sheward 55 TF1500 # 7427

OK I did a bit of research and I withdraw my objection.
It seems that the SU can handle the issue.
Here is a quote from Wikipedia.

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"Should the intake manifold's pressure be higher than that of the crankcase (which can happen in a turbocharged engine, or under certain conditions, such as an intake backfire), the PCV valve closes to prevent reversal of the exhausted air back into the crankcase again. In many cases PCV valves were only used for a few years, the function being taken over by a port on constant depression carburetors such as the SU. This has no moving parts or diaphragm to jam, block or rip like many PCV valves. It also does not have a 'one-way' function but the lack of it was never a problem in intake backfire."
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Here is the complete reference.

https://en.wikipedia.org/wiki/Crankcase_ventilation_system


Jim B.
JA Benjamin

Jim,
Thank you once again.
Mort
Mort 50 TD

This thread was discussed between 22/07/2014 and 23/07/2014

MG TD TF 1500 index

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