Shuiend blows motor #5; Naturally Aspirated Glory Incoming
05-06-2013, 01:17 PM
#1532
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So I have dropped the bottom end off at the machine shop and talked to them about it. Currently they are in the middle of building 3 motors so we could not start the tear down now. When they have the space to tear mine down I will be there for it.
First I explained to them what was going on with oil pressure and why I pulled the motor. Then we pulled the motor out from the back of my car and I showed them how the crank moved in and out. Then I showed them the wear marks in the cylinders. Once they saw the crank moving in and out they knew something was up with the thrust bearing. When they looked at the cylinder walls they say those patterns generally come from oiling issues. So what the machinist thinks happened is some how during the initial trying to build oil pressure the throw out bearing some how spun or got worn down. Then with that out of place and the crank being able to move it possibly wore down some of the bearings. This could explain the oil pressure issue once the oil is warm.
As soon as we get to tearing down the motor I will be taking pictures and posting what we find. In the mean time I am just going to seam weld my engine bay.
First I explained to them what was going on with oil pressure and why I pulled the motor. Then we pulled the motor out from the back of my car and I showed them how the crank moved in and out. Then I showed them the wear marks in the cylinders. Once they saw the crank moving in and out they knew something was up with the thrust bearing. When they looked at the cylinder walls they say those patterns generally come from oiling issues. So what the machinist thinks happened is some how during the initial trying to build oil pressure the throw out bearing some how spun or got worn down. Then with that out of place and the crank being able to move it possibly wore down some of the bearings. This could explain the oil pressure issue once the oil is warm.
As soon as we get to tearing down the motor I will be taking pictures and posting what we find. In the mean time I am just going to seam weld my engine bay.
Last edited by shuiend; 05-07-2013 at 04:40 PM.
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05-08-2013, 09:53 AM
#1537
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So what the machinist thinks happened is some how during the initial trying to build oil pressure the throw out bearing some how spun or got worn down. Then with that out of place and the crank being able to move it possibly wore down some of the bearings. This could explain the oil pressure issue once the oil is warm.
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05-08-2013, 10:26 AM
#1538
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Every single engine I've ever had, in every car, builds pressure off turning the key for 10-30 seconds, then I can start the car. Every, single ******* time. I'd like to know what this machinist's suggested procedure is for an oil prime on Miata. This is starting to reek of ****.
The plan as of now is to swap over an oil pan that is already fitted for an oil drain line. Then put my absurdflow setup on the stock 01 engine and just run whatever I currently have wastegate at which should be 6-8psi. Engine should be fully put together by the end of this week and the actual install of the motor should happen Sunday morning.
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