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Old 08-13-2013, 04:50 PM   #1
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injector pump leak

my injector pump on my perkins 354 is leaking at the point where the linkage enters the pump, not a lot just a drip every 15 -20 seconds

1. Will this let air into the system and shut down the engine?
It has not yet but will it if it gets worse?

2. Rebuild the one I have or get a new pump?

3. has anyone done this and what was the cost factor?


Thanks
Dave
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Old 08-13-2013, 10:17 PM   #2
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I haven't had this happen yet on either of my 6.354's, but the injector doctor tells me that this is a common failure on the CAV rotary pump and the pump needs to be brought in for a visit to the doctor when this happens.

It's major surgery, (cornary bypass surgery on the pump and a Colonoscopy for you.) About 6 boat dollars as I recall!!

LB
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Old 08-14-2013, 12:43 AM   #3
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Quote:
Originally Posted by davesail View Post
my injector pump on my perkins 354 is leaking at the point where the linkage enters the pump, not a lot just a drip every 15 -20 seconds

1. Will this let air into the system and shut down the engine?
It has not yet but will it if it gets worse?

2. Rebuild the one I have or get a new pump?

3. has anyone done this and what was the cost factor?


Thanks
Dave
1. Possibly, depending on where and how large the seal breach is. The best way you can find out is to take a clear piece of vinyl hose and run it from the return port to your return line. If you see air bubbles, then you have air. It might not shut the engine off, but it will degrade performance.

2. I would get the pump rebuilt. There is no reason to purchase a new one unless the old one is not rebuildable. Rebuilds of injector pumps will always be more cost effective than buying a brand new one.

4. If you are able to get away with a simple resealing, it should cost under $500. Try calling Diesel Fuel Injection Service in Portland, OR. They have rebuilt several pumps for me and are highly skilled. I have mailed the pumps to them and have gotten them back in about a week.
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Old 08-16-2013, 11:22 AM   #4
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If its dripping that means there is pressure behind it from the supply pump, it will not suck air. The seal may be replaceable in place, most likely a lip type seal. If the leaver can be removed from the shaft you may be able to pull the seal & use it to source another from a bearing supply house. You can then tap the new into place using a deep well socket, the system will then need to be bled. Good luck
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Old 08-16-2013, 02:45 PM   #5
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It is crazy, but I was literally going to post the EXACT same problem that has popped up on mine. The only difference is that it's the fuel shutoff linkage that is dripping on mine. Weird. ;-)
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