Unfortunately cat parts especially there reman heads are not what they used to be. Seems quality control has gone down and it's really a crap shoot on what you get from them some days. I would see if they will warrenty it with a new head. If not , get seats cut.
3406e shutter missing
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Magnetic379, Jan 13, 2019.
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Sounds like the same problem truck307 had. He could blow air through the return line just fine but the blockage would stop the fuel from flowing. New fuel line probably in order and some what cheap.
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Anybody else have a view on this????
You said earlier all the lower O -rings are burnt up . I was assuming the blue ones.
If indeed you are talking about the ones on the tip then no, those are basically a carbon dam . They eventually deteriorate and get replaced with carbon deposits. If indeed your blue ORings are perfect and looks to be no blueing or burnt area getting past the seat maybe your fine.
Possible injectors them selves are bad? Reman cat injectors dont have a good reputation either.pushbroom, spsauerland and Oxbow Thank this. -
Oxbow Thanks this.
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spsauerland and Oxbow Thank this.
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Like swaan said the fuel pressure is high. I don't like to see over 110 at high rpm. Does the return fuel still run through the ecm ? If so bypass the ecm. Higher fuel pressure higher fuel temp.
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