Shuiend blows motor #5; Naturally Aspirated Glory Incoming
#1361
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fwiw- I don't see any oil coming out the feed if either of the two following are not addressed:
1) Crankcase is sealed from atmosphere (you're just pulling air through your cc vents, through the oiling points at "bearing" surfaces)
2) There is a minimal prime on the pump (enough to assist in the shopvac vacuum to pull the oil from the pickup to the pump- but I think there is Zero prime on this pump)
Seal up the engine and try again...
Or you could make something like this and be done with it:
1) Crankcase is sealed from atmosphere (you're just pulling air through your cc vents, through the oiling points at "bearing" surfaces)
2) There is a minimal prime on the pump (enough to assist in the shopvac vacuum to pull the oil from the pickup to the pump- but I think there is Zero prime on this pump)
Seal up the engine and try again...
Or you could make something like this and be done with it:
![](https://www.miataturbo.net/attachments/build-threads-57/55169-shuiend-blows-motor-5%3B-naturally-aspirated-glory-incoming-eq-pl40.jpg?dateline=1348060641)
#1367
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fwiw- I don't see any oil coming out the feed if either of the two following are not addressed:
1) Crankcase is sealed from atmosphere (you're just pulling air through your cc vents, through the oiling points at "bearing" surfaces)
2) There is a minimal prime on the pump (enough to assist in the shopvac vacuum to pull the oil from the pickup to the pump- but I think there is Zero prime on this pump)
Seal up the engine and try again...
Or you could make something like this and be done with it:
![](https://www.miataturbo.net/attachments/build-threads-57/55169-shuiend-blows-motor-5%3B-naturally-aspirated-glory-incoming-eq-pl40.jpg?dateline=1348060641)
1) Crankcase is sealed from atmosphere (you're just pulling air through your cc vents, through the oiling points at "bearing" surfaces)
2) There is a minimal prime on the pump (enough to assist in the shopvac vacuum to pull the oil from the pickup to the pump- but I think there is Zero prime on this pump)
Seal up the engine and try again...
Or you could make something like this and be done with it:
![](https://www.miataturbo.net/attachments/build-threads-57/55169-shuiend-blows-motor-5%3B-naturally-aspirated-glory-incoming-eq-pl40.jpg?dateline=1348060641)
You fail to understand my abilities to make things. While that device looks cool and if you knew what you are doing would probably be easy/cheap to make. I on the other hand will have to goto Northern Tool and buy one. Yippee time to spend more money.
I am looking at picking up one of these to use to try to prime the engine. I figure I will put oil in it, then pump it then hook to my oil pump and let the oil flow through the system.
This is the device that you actually posted in the picture. I rather not spend $220 on ordering one when the number of uses I will get out of it will be minimal.
Last edited by shuiend; 09-19-2012 at 11:13 AM.
#1373
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So I spent some more time messing with it. When I removed the plug from the oil pump and cranked the motor oil did shoot out. So I know the oil pump is working. I am working on finding or making one of those things m2cupcar. Since the pump works and I get no pressure I think something somewhere is blocking an oil passage. Tomorrow during lunch I will be going to talk to the machinist. I have a big deadline at work next week so I am not sure when I will get to pull the motor. I am going to try to get it out and back to the machine shop Monday and hopefully stay to watch them tear it down.
#1374
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So I spent some more time messing with it. When I removed the plug from the oil pump and cranked the motor oil did shoot out. So I know the oil pump is working. I am working on finding or making one of those things m2cupcar. Since the pump works and I get no pressure I think something somewhere is blocking an oil passage. Tomorrow during lunch I will be going to talk to the machinist. I have a big deadline at work next week so I am not sure when I will get to pull the motor. I am going to try to get it out and back to the machine shop Monday and hopefully stay to watch them tear it down.
Can someone please explain how a single blocked passage unless it is right at the pump could prevent the motor from getting oil?
Serious question.
#1376
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I found this link here on how to use the shopvac to prime from the oil filter.
#1377
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That's key ^ The first "stop" after the pump is the filter. So it's a direct shot from the pickup to the pump to the oil filter mount- removing all the leaks to atmosphere. Like sucking through a straw. I have no doubt the shop vac would pull oil from the sump through the pump per that link above. As I read it, you pulled vacuum much further down the oiling route correct?