MFI question

[c911s]

69 pump - posts on MFI adjustment proceedures seem to indicate that there is a gasket between cover and pump body at outside end of thermostat; is this so? is it available ? what thickness/material for making one? thanks

[304065]

There IS a gasket-- no part number listed for it in PET, however. It's not rubber or cork, more like thick paper, but can't be more than about .10 mm thick. Unfortunately I don't have a micrometer, or I'd pull off my thermostat and measure.

The thickness of the gasket is critical to the correct warmup mixture.

[Grady Clay]

John.

You are absolutely correct. That simple gasket partially determines the thermostat shut-off characteristics. There needs to be a standard for that. If nothing else, measure your existing (original?) gasket and make a new one the same thickness.

The differences shouldn’t effect the fact that the thermostat shuts off, just when. The thicker – the later, but richer in the process. Err on the lean poor running side.

Best,
Grady

[c911s]

thanks for the quick reply guys
I do not have a gasket at this location, reason for the question. Am in process of cleaning the thermostat discs etc....

[c911s]

FYI - photos of the discs during clean up, thermostat housing pre and post cleaning - made a paper gasket for the end, can not hurt to try...

[svandamme]

in case your pump needs new gaskets for the shutoff solenoid, or for the idle adjust plate... i used black sillicone (leftover from the PPengine rebuild chemicals kit) in that area, and it worked really well , just a bit difficult if you need to apply it with the pump mounted in the car...

[David E. Clark]

Please take a look at the Ultimate MFI resources thread and add your links and resources. It will make a great resource for all of us.