- Oct 12, 2011
- summerville, south carolina
Whoa, the engine and the interior ended up very clean. Nice car, once again.
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Thanks for the kind words. Funny you should mention undercoating- I'm currently looking into what it will take to keep it from turning to dust in winter. The undercoating on the car is currently all there, it's just also very crispy. I'm thinking 3M Rubberized Undercoating will be a good option, but I haven't really found much for fluid film/cavity wax that people like over the long term. If anyone has any recommendations, I'm all ears.
Maybe here some useful info. https://www.oldtimer-markt.de/rostschutztest
Its in German but one of the better tests. You can easily see per product what it does. Teil 1 2 3 on the bottom of the page leads you to the 1st 2nd 3rd tests, each a few years later down the road.
Bear in mind that relatively fresh sheet metal has different needs for the wax/grease to stick than a rusted piece of sheet metal in a real old crusty car, like in the test. I'm using either Fluid Film or Mike Sanders.
Can you get some kind of paint-oil? I used "Owatrol" oil, smells line seed based, to freshen up old under body coating before smearing new stuff on it a few days later. Probably similar oils can be found for treating wood paneling and stuff on ships.
Sorry to hear about the impact stolen, I can’t stand the sh!t...you’re doing really nice work here.
This is my favorite car on TB.
Great thread, nice car, and excellent choice on the Critical Habitat plates!
I'm convinced I get away with more with those plates
Nice work, car is looking great and good to see someone else keeping one of these early 7 sedans on the road.
I think that auxiliary electric vacuum pump was only used on the early 7 series turbos with ACC climate control, but they got rid of them in the later years so they must have figured out they were unnecessary. I had an '84 764T with a B23FT that had one but all the later turbo 7's I have had or seen, '86 on, did not.
Presumably the idea was to provide a vacuum source to keep the vacuum-actuated HVAC functions working during situations when the turbo was creating positive intake pressure. I guess they must have determined that the big vacuum reservoir inside the front bumper, with a check valve, was sufficient for that purpose even without the pump as long as the driver wasn't switching HVAC modes repeatedly while keeping pedal pinned for minutes at a time climbing a mountain pass. Pretty corner-case usage scenario.
In short I think you'll find you can keep that pump out of the car permanently with no meaningful effects, as long as the check valves in your vacuum system are sealing well and the system isn't leaking. Plus you said the pump was already dead anyway. Certainly there won't be any ill effects on the electrical side from its absence.