Mcxpress scavenge pump

P

pelon

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Oct 29, 2008

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Billings Montana

• Dec 5, 2015

• #1

I built a custom rear mount turbo on my nypex and I am using the mcx scavenge pump. However, the pump is not pulling any of the oil out of the turbo and its dumping out the exhaust.

Any suggestions?

 

D

djones000buck

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Oct 15, 2010

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Birch Run, Michigan

• Dec 5, 2015

• #2

Probably the cross pin on the bolt holding to the pump shaft. But double check for kinks in the oil line as well. Never really heard of one going bad so should be something easy. Some more info here:

http://www.ty4stroke.com/threads/mcx-mechanical-or-an-electrical-oil-scavenge-pump.62951/

 

P

pelon

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• Dec 6, 2015

• #3

djones000buck said:

Probably the cross pin on the bolt holding to the pump shaft. But double check for kinks in the oil line as well. Never really heard of one going bad so should be something easy. Some more info here:

http://www.ty4stroke.com/threads/mcx-mechanical-or-an-electrical-oil-scavenge-pump.62951/

Click to expand...

Turns out the outer cross pin (pump side) sheared off on both sides and left pieces in the gear. Sad part is the pump is brand new....... Any thoughts what would cause this?

 

P

peakperf

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Cranbrook, BC

• Dec 7, 2015

• #4

We had a Vector shear off a couple of these pins, there was a slight burr on the edge of the inner pump mandrel (star shaped). When the cover was tightened on with the 4 screws it would occasionally "catch". We figured that it would jam and then shear the pins. We cleaned up the edges on it with some fine emery cloth on a piece of granite, similar to decking a head. No more issue.

 

M

M5-

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• Dec 8, 2015

• #5

It happens once and a while so it not a bad idea to have/carry a spare pin.

M5

 

Mountaintech

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• Dec 9, 2015

• #6

Is the scavenge system vented?

 

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pelon

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Billings Montana

• Dec 12, 2015

• #7

Mountaintech said:

Is the scavenge system vented?

Click to expand...

No it was not and I assumed that could contribute also

 

Mountaintech

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• Dec 12, 2015

• #8

Describe how the oil exits your turbo.

 

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pelon

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Billings Montana

• Dec 12, 2015

• #9

Mountaintech said:

Describe how the oil exits your turbo.

Click to expand...

The oil came out thought the exhaust.

I have aTilton pump hooked up in the front of the sled in the meantime till I can fix the mcx pump.

 

Mountaintech

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• Dec 12, 2015

• #10

What I meant was, is how does the oil exit the turbo? Do you have a catch tank or just an oil return line. For the system to function properly it is best if the oil enters a little tank before it gets evacuated via a hose. The tank needs to be vented with a line that goes forward to high point.

 

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GreenM5

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Jan 8, 2008

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Ontario, Canada

• Dec 13, 2015

• #11

pelon said:

The oil came out thought the exhaust.

I have aTilton pump hooked up in the front of the sled in the meantime till I can fix the mcx pump.

Click to expand...

Any pics of how amd where you.mounted the Tilton pump

 

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pelon

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Billings Montana

• Dec 13, 2015

• #12

Mountaintech said:

What I meant was, is how does the oil exit the turbo? Do you have a catch tank or just an oil return line. For the system to function properly it is best if the oil enters a little tank before it gets evacuated via a hose. The tank needs to be vented with a line that goes forward to high point.

Click to expand...

Sorry read that too fast and completely wrong.

Yes I have a small tank but I did not have it vented. So when I put the mcx pump back on, it will be vented.

 

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pelon

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Billings Montana

• Dec 13, 2015

• #13

GreenM5 said:

Any pics of how amd where you.mounted the Tilton pump

Click to expand...

The tilton pump is mounted up in the nose of the nytro. I have it in the small space that heads back towards the steering components. You can put it there horizontally or mount it vertically in the tip of the nose with the 6AN fittings on the bottom. The tilton pumps seem to get good reviews as a scavenge pump. It has been used as a differential cooler pump on vehicles for awhile.

The good thing is it's self priming up to 8 vertical feet and does not draw a lot of juice. The bad part in my opinion is it weighs about 4 lbs with hoses etc, hence why I want to use the mcx.