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400 Big Cam question

Old Sep 26, 2007 | 06:37 PM
  #1  
DMAN99's Avatar
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From: Indiana
400 Big Cam question

I have bent one and broke one pushrod on the 3,4 cylinders and I have got new ones and I need to know the adjustment on the injector pushrod as in where the engine needs to be and how to adjust it? Thanks Derrick
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Old Sep 26, 2007 | 08:47 PM
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From: Whitehorse, cultural hub of the universe..
the old 855's used an A,B,C setting system. Now I could be off on this, which equals bad results, but, here is the spec for an N14, which is based on the 855

on the accessory drive pulley, you will see marks, TDC, A,B, and C

Rotate the engine clockwise to A, and set the valves on #5 and the Injector on #3
Advance to B, set the valves on 3 and the injector on 6
Advance to C, set the Valves on 6 and the injector on 2
Advance to A, set the valves on 2 and injector on 4
Advance to B, set the valves on 4 and the injector on 1
Advance to C, set the valves on 1 and the injector on 5

Valves are set at Intake .014" and exhaust .027"

Injector set depends somewhat on what kind of injector, STC or otherwise. That is something best left to the proper service manual for the engine.

I may have the info here, not entirely sure on that yet. If you have the STC injectors, there is a specific tool employed to hold the STC tappet in the maximum upward position while adjusting the pushrod. This tool is not required if you have a lot of experience with these engines, but for a novice, its a darn good idea to either have the tool, or just have someone who knows the procedure, do the adjustment for you.

Good luck
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Old Sep 28, 2007 | 09:22 AM
  #3  
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From: Fancy Gap VA
Not sure of you CPL but while you have it down jack the timing up to about 71 Degrees and watch that bad boy get it.
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Old Sep 28, 2007 | 01:31 PM
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From: Western Pa
Originally Posted by lastchance
Not sure of you CPL but while you have it down jack the timing up to about 71 Degrees and watch that bad boy get it.
FIRE IN THE HOLE!!!!!!!!!
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