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3406c cat engine serial # 3zj61664 when we time the
3406c cat engine serial # 3zj61664 when we time the injection pump by the cat procedure each time we start and run it it smokes and runs rough. We shut down and recheck the timing it is off. like some… read more
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Want to change injector cup seals on a 3406c heads looking
want to change injector cup seals on a 3406c heads looking for type tools needed and proceder … read more
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hi my name is XXXXX XXXXX own a shop can you help me put anew
hi my name is XXXXX XXXXX own a shop can you help me put anew dial the round the round wheel with the alpahbet on them on a 3406c… read more
Cat Man
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cat 3406c will not start without ether.. runs fine after firing
cat 3406c will not start without ether.. runs fine after firing off. rebuilt the transfer pump, fuel pressure cranking is around 40 psi.… read more
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Hi, I have a 1994 kenworth with a 3406c peec III engine. The
Hi, I have a 1994 kenworth with a 3406c peec III engine. The peec electronics and injector pump are getting older and as a result I am having problems. Eg. Misfiring, no power etc. I need to know if I… read more
Cat Man
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I have a 425 cat 3406c. There is no tag on the motor and I
I have a 425 cat 3406c. There is no tag on the motor and I am trying to find out if it's prefix is 3zj / 5kj / or 8pn. How can I tell?… read more
Cat Man
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1993 pete..3406c model mechanical..overhaul..reman..my oil pressure
I have a 1993 pete with 3406c model mechanical on it's second overhaul has 550.000 miles. the oilpump gear went out i replaced the gear and pump with cat reman 138.000 miles back. my problem is my oil… read more
Daniel Wilson
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injector..my mechanic set it and then it wouldnt run..rebuilt..driven
trying to figure out what has happened to my truck...went from running good and strong to having a slight miss kind of like an injector miss...i was told by several people that is was in the timing ad… read more
Cat Man
Cat Man
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I have a 3406C 425 horse caterpillar with a fully mechanical
I have a 3406C 425 horse caterpillar with a fully mechanical injection pump. Was wondering what the best way to get more power out of would be, as far as turning pump up or swapping turbos. Engine is … read more
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94 freightliner..mechanical..knocking sound..louder..power steering
so i have a 94 freightliner with 3406c mechanical 3zj engine. the engine has developed a knocking sound in the front cover area, i notice this noise is louder when the air compressor is running or whe… read more
FIX-IT
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I have a 3406 engine with a serial #starting with 3zj is it a b or c
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Clayton
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1993 peterbilt with a 3406c mechanical...fuel in oil but does not miss
I have a 1993 Peterbilt with a 3406C mechanical. Has fuel in oil but does not miss. What could cause this?… read more
Cat Man
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I called the two local cat dealers that are fairly close to me
I called the two local cat dealers that are fairly close to me and tried to tell them what I needed and the guy in knoxville just said he couldnt help me, the other guy in corbin said the man that usu… read more
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95 peterbuilt engine cat..truck ran..Tried ether makes no difference.
95 Peterbuilt engine cat 425 346c model has 305000 miles on it. truck ran out of fuel and now will not start. Tried ether makes no difference. Checked timing good, fuel filter good, air filter changed… read more
Don
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pete..Engine backfire after shift randomly and time fault occurs
1993 Pete 13 speed Cat 3406c. Engine backfire after shift randomly and time fault occurs after enough time for the delay before default period is met. Cat shop say that some of the 3406c engine had a … read more
KevinB
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Mechanical..injectors,air fuel ratio,air to air,fuel lines..timing
I have a 3406C fully mechanical low power. I have replaced injectors,air fuel ratio,air to air,fuel lines,air filters,timing advance.Truck still has no power smokes like an A model any ideas.… read more
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electronic side of the timing advance over fuel..piston..mechanical
on a 1994 3406c engine. would the electronic side of the timing advance over fuel the engine and in result burn up a piston or would only the mechanical side do it.… read more
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manufacturers certifications
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star: 3406c peek in it, need wiring diag of both engines to finish
4864f western star 1993 model had a 3176 in it that shat, we are putting a 3406c peek in it, need wiring diag of both engines to finish… read more
Tim
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Meet the Experts:

Chris (aka - Moose)

Chris (aka - Moose)

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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