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Post by dimeadubbin on Sept 3, 2007 23:50:17 GMT -5
Hello everyone I'm Tony. I was fortunate enough to buy Milton the 70' bay from Joby before he moved far away but then Milton broke. I was driving along and the red OIL light came on. I stopped, checked it out, oil level was okay but the engine seemed hot. I waited, drove a couple blocks, waited and drove the next two blocks home(not sure if I should have). as soon as the engine turns over the oil light goes on. it is not the oil pressure sensor, or the wire connection. I checked the oil pressure control valve and relief valve, they slid out fine and smooth and looked clean. I tried thicker oil and that didn't do it. Could this be a faulty oil pump? if so can I replace it without pulling the motor? or what else could I check before moving on to major work?
Thanks in advance for your advice, The times I had driving it were awesome and I'd like to keep this thing running. Buses are so cool.
Tony
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Post by riffraff on Sept 4, 2007 11:25:22 GMT -5
Welcome Tony
The seeming lack of oil pressure is a serious problem.
I think what you need to do is determine if there really is low oil pressure, or if you are getting a bad signal. The easiest way to do this I think is to order up an oil pressure sending unit and gauge from CIP1 or possibly FLAPS and actually quantify what the oil pressure is. Once you know the actual pressure in psi (or kPa), you have the information you need to decide what the next step should be.
If you really have very low(or no) oil pressure, you will need to tear down the engine to see why.
That would also fit with the symptom of hot engine as there would be no oil circulating through the pil cooler, but air cooled engines can fool you in that they can seem really hot and not be in the danger zone.
It is unlikely that it is the oil pump - they are pretty robust. Perhaps something plugging the intake of the oil? Pickup tube rattled loose?
If there is no knock or other associated awful engine noise associated with the warning light being on, it seems unlikely that you spun a bearing or suffered a similar catastrophic failure.
So, in answer to your question: If it was mine, I would
First - drop the plate on the bottom of the engine and ensure that the pickup tube is firmly attached and there is no blockage
If that is the case, get an actual oil pressure sending unit and gauge and quantify what the actual oil pressure is.
Then report back.
The opinions expressed are mine alone and may or may not reflect the views of my wife, dog or stockbroker.
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Post by rareair on Sept 4, 2007 19:54:56 GMT -5
Keith as usual is correct, but I will say that I would rent or borrow a mechanical gauge and thread it into the port where your stock oil sensor goes. This will give you the most accurate reading, and will probably be quicker/cheaper than buying an elect. gauge setup (even though that would be a wise investment in the future)
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Post by dimeadubbin on Sept 6, 2007 21:18:24 GMT -5
well Unfortunately there IS an awful noise in addition to the oil light. At first I thought it was just the belt but I removed the belt and it is still there. It is a very loud squealing noise  could be metal. any way I bought a guage, an 80psi in dash one. It didn't come with instructions so I hooked up the + to + and - to - and S to the sending unit. (there were two more connections but I assumed they were for a back light) it jumped up to zero upon connection but when I turned the motor over it did nothing. ALSO the filler neck. It was loose since I got the bus I thought that was just how it sat and I didn't see how it could tighten. tonight I did. so that couldn't have been good. and thats my progress. thanks for you guys' input. What could that squealing noise be? its not constant, its pulsating every cycle I suppose. Tony |
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Post by dimeadubbin on Sept 11, 2007 22:27:35 GMT -5
Well I took the motor out. That was pretty easy. I'm gonna start dismantling everything now. I plan on just following the 'how to keep your Volkswagen alive' book. Should I rebuild the generator while everything is apart or is that unnecessary? also what sort of things should I be looking for while dismantling to tell me what the problem was?
Tony
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Post by bullyboy on Sept 13, 2007 10:08:03 GMT -5
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Post by riffraff on Sept 13, 2007 11:43:21 GMT -5
I would suggest you get the red "How to Rebuild your Volkwagen Engine " book as well.
As far as what to look for - the symptoms sound like a spun bearing - should be easy to spot once you're inside.
Good luck with it.
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could be metal. any way I bought a guage, an 80psi in dash one. It didn't come with instructions so I hooked up the + to + and - to - and S to the sending unit. (there were two more connections but I assumed they were for a back light) it jumped up to zero upon connection but when I turned the motor over it did nothing. ALSO the filler neck. It was loose since I got the bus I thought that was just how it sat and I didn't see how it could tighten. tonight I did. so that couldn't have been good. and thats my progress. thanks for you guys' input. What could that squealing noise be? its not constant, its pulsating every cycle I suppose.