I don’t know vacuum ?? help requested.
I have a 1980 300SD om617.950 I have installed it into a 1985 4runner and I fell the vacuum pump is not producing adequate vacuum. I put my finger over the hose and I can barley fell a pull/draw ? the engine was in a salvage yard for a few years ? and it is the single port pump.
Is this correct ? thanks for the help from the new bee knob in Wisconsin. some pics of the swap http://i63.photobucket.com/albums/h1...-44-58_126.jpg http://i63.photobucket.com/albums/h1...-10-20_341.jpg http://i63.photobucket.com/albums/h1...3mikem/om1.jpg http://i63.photobucket.com/albums/h1...em/om617-5.jpg http://i63.photobucket.com/albums/h1...em/om617-2.jpg http://i63.photobucket.com/albums/h1...em/om617-3.jpg some video aswell.. First run OM617.950 1985 4Runner tdswaps.com kit - YouTube <iframe width="560" height="315" src="First run OM617.950 1985 4Runner tdswaps.com kit - YouTube" frameborder="0" allowfullscreen></iframe> |
Get a Mity Vac and get a reading on the level of vacuum and report back. Should be at least 18 inches of mercury depending on your altitude.
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will do that tonight.
are the pumps hard to rebuild ? or get a used on e from a salvage yard ? |
Most people rebuild them.
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are the pumps hard to rebuild ? |
1 inch of mercury = 0.49109778 pounds per square inch
Ok I get it now. At least 8.039 PSI |
1 Attachment(s)
Inch of mercury - Wikipedia, the free encyclopedia
inHg is it's own measurement. I would think the pump is a diaphragm unit. |
Picture shows a diaphragm pump. They are easy to rebuild. Common failure is a bad check valve which wouldn't require a new diaphragm.
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can u chet the check valve ?
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I did take the check valve out and the was now air flow in our out I did get it to open but not close again. So I need a new check valve. But with the check valve in and stuck open my vacuum gauge jumped around from 15-20 psi.
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Well, if you're getting psi, then something is seriously wrong:)
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Sorry I ment inches of vacuum
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Quite clearly a piston pump.
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It is the piston pump by pics #2 & 5. The rebuild kit is a little more spendy if its not just a faulty check valve.
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