Medium and Heavy Trucks

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Cat man, I've read many of your diagnosis over the last year
Hello Cat man, I've read many of your diagnosis over the last year and want to thank you for the information and the money I've saved. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
Oil pressure problem. 2004 Pete 379 cat bxs. No trying to
when I'm at idle it's at 30 psi when I got it shoots up to 60 psi but when I get in 12 and 13 gear it drops to 40 psi when I get it throttle or pulling a heal. And the truck looses speed going up small grades with 15,000lb… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
I have a 2000 year 6NZ C15 @ 550/1850 with 800,000 on out of
I have a 2000 year 6NZ C15 @ 550/1850 with 800,000 on out of frame rebuild. I am doing a ground up restoration on my 2001 Western Star, owned & operated for 16 years. I wanted to upgrade to C18 specs.… read more
Bradey V
Bradey V
Certificate
I have a 2006 NXS Acert engine with over 1.3 million miles.
I have a 2006 NXS Acert engine with over 1.3 million miles. It's getting old and worn out, alot of blow by, and is using a gallon of oil every 6k-8k miles. I know a rebuild is in the future. I'm fed u… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
Can you put acert water pump on single turbo c15. Cat
2001 Pete 379. Wondering if acert high volume pump would better cool my non acert cat… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
1988 peterbilt with 4MG cat 3406b engine. All stock factory
1988 peterbilt with 4MG cat 3406b engine. All stock factory rated @ 310 horsepower on engine plate. I know the pump can be turned up, & a lot of things to get more power. I don't want to change the tu… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
I'm a grain farmer and I'm looking to buy a used semi. I
I'm a grain farmer and I'm looking to buy a used semi. I have a Freightliner that I'm trading off. We also have a 2011 t800 curved glass Kenworth that I like but have had a couple of engine issues but… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
Peterbilt 379. I flopped my 05 Pete 379 with 63 flat top and
Second opinion] Peterbilt 379. I flopped my 05 Pete 379 with 63 flat top bunk and skidded down the highway on passenger side. They wrote it off, of coarse because it's age. I want to rebuilt it but ha… read more
timdieseltech
timdieseltech
lead diesel tech, shop owner
Vocational, Technical or Trade School
202 satisfied customers
I have a c15 acert serial number mxs rates at 550 hp. The
I have a c15 acert serial number mxs rates at 550 hp. The motor has a cold skip that goes away when water temp reaches about 150. The engine was platinum overhauled by thompson caterpillar. It also re… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
I just swapped out my cat c13 acert engine in my 05 pete
Hey Tim, I just swapped out my cat c13 acert engine in my 05 pete 379, and replaced it with a c15 6nz engine, both were 70 pin on the harness. it will crank, but only fire on ether. of course it dies … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
I have a c15 mbn single turbo with 1.4 million miles on it
I have a c15 mbn single turbo with 1.4 million miles on it that hasn't been touched. Original bearings, head has never been off. Injectors are original also except for #4 injector. It burns 1 gallon o… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
I have a 2006 Pete 387. 1.2 million miles and the c-15 acert is worn out.
Hello, I have a 2006 Pete 387. 1.2 million miles and the c-15 acert is worn out. I am considering an in frame....cat offers a platinum with a four year warranty. Is this the right path in your opinion… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
Hello Sir. I have a cat c15 acert 475 590k miles on a pete
Hello Sir. I have a cat c15 acert 475 590k miles on a pete 379 car hauler of which I am in the middle of a "rebuild". I was very unimpressed by the massive blow by issue I have. I even enlisted your k… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
hi,i bought my 2002 flate top pete in2009. 475 cat but previes
hi,i bought my 2002 flate top pete in2009. 475 cat but previes owner rebuilt motor from cat and thay tune up to 550 with 370 rear ends 275/8022.5 tires i drive 60mph fuel milege with pulling flatebed … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
Hi I have a cat acert 05 it has been rebuilt about 180000
Hi I have a cat acert 05 it has been rebuilt about 180000 miles ago but it is getting a bad fuel mileage and is suppose to be 550 but doesn't pull more than 475 any idea what it could be?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
I have a 2013 western star with dd15 and i would like to know
I have a 2013 western star with dd15 and i would like to know what max boost should be as it doesnt seem to pull as good as the old 06 cat twin turbo 550 and uses a lot of def at 23 gals us in 3000 mi… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
Okay Jeremy, giving you another question. Give me your opinion
Okay Jeremy, giving you another question. Give me your opinion on the following trucks based on mpg and relability, they will have varied uses and drive to 48 states. Also, assume all are in the like … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
cat man I have a turbo question. I have two c15s one in a
cat man I have a turbo question. I have two c15s one in a flat top pete that we rebuilt in the spring and the other in a midrise that we just rebuilt. Both are 6nz motors. the one in the spring we put… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,220 satisfied customers
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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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