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Old 08-16-2007, 09:19 AM   #1 (permalink)
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Cat 3116 Injector settings

Hi there...can anyone tell (or link) me the procedure for adjusting the injectors (mechanical) on a 1994 4TF 3116 engine...the height setting is 64.34mm

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Old 08-20-2007, 10:23 PM   #2 (permalink)
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Re: Cat 3116 Injector settings

You need the sial indicator and fixture to correctly set them. If you are on number 1 TDC adjust injectors 3,5 and 6, then rotate engine to number 6 TDC and adjust injectors 1,2 and 4. If engine still runs rough after adjusting the timing (injector height) and injector sync (small screws on rack) Set the injector height lower about 1/2 to 3/4 of turn, making the reading lower. Sometimes as these engines get some age on them the rack will hang up and by adjusting them tighter it can help to over come this instead of replacing the rack. Sync can be done by ear instead of using indicator. With engine running at idle, carefully start adjusting the screws one way or the other, one way will make engine labor and vibrate more and other will speed engine up, adjust in the middle just like turning the distributor on a gas engine to set timming.
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