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Old 05-15-2006, 09:23 AM
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Fuel pump push rod 350/ 400

I have a 350 block with a 400 crank it is all assembled and tuned up now but I could not get rid of what I thought was lifter noise until I took off the fuel pump.

The pump is brand new Holey 110 gpm mechanical pump. And it makes a persistent tick tick tick

Is the fuel pump rod on a 350 different from a 400 sbc. Could this be the cause of my problem if I put the wrong one in when I assembled the engine.

Ric

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Old 05-15-2006, 09:34 AM
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There no different. You may want to check how much wear your current rod has.
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Old 05-15-2006, 10:07 AM
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There is no apperent wear on the push rod.

Ric
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Old 05-15-2006, 10:14 AM
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The push rods are all the same. Everytime I have had the tick tick tick problem it was when I put on a new fuel pump. The noise is coming from the new pump. Put another pump on and see if it goes away.
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Old 05-23-2006, 05:58 AM
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Put the new pump on last night will start it up today after work and see if it went away.


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Old 05-23-2006, 10:54 AM
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One thing I can recommend is to pack the upper section of the pump with white lube or moly lube, in most cases it says nothing about it when you buy the pump new, however the spring needs lube, and oil that rides down the pump push rod doesn`t get up in that area, so when the spring doesn`t have any lube it over heats and looses it`s tension. I packed my pump with white lube and it stays in there quite a long time but it does need checked once a year at least.
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