Medium and Heavy Trucks

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I have 2001 kw 9 with cat c15 6nz 1.3 million miles my oil
I have 2001 kw 9 with cat c15 6nz 1.3 million miles my oil psi gauge and engine break behavior is weird!! When the engine break start my oil psi drop from 60 to 20 and go up sound also change like eng… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
604 satisfied customers
I have a 06 c15 mxs18167 cat engine that has had the vva's
Hi I have a 06 c15 mxs18167 cat engine that has had the vva's deleted. While doing a inframe I noticed the oil supply line has been plugged going to the vva and Jake housing is this the proper way to … read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
80 satisfied customers
I got a c15 acert msx and my water cooling temp runs around
Hi I got a c15 acert msx and my water cooling temp runs around 180-190 and pulling hills 200 and my oil temp stays at 225-250 and I pulled my oil cooler to see if wasn't dirty or anything but it's sti… read more
TomcM28
TomcM28
Owner
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C15 Acert MXS from cylinder head job with new spacer plate
c15 Acert MXS from cylinder head job with new spacer plate and bolts . coolant in oil and coolant running down breather tube. what could be the problem… read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
80 satisfied customers
I have a C15 cat 05 peterbilt I've lost 5 to 8 lb of oil
I have a C15 cat 05 peterbilt I've lost 5 to 8 lb of oil pressure and can't find it put a new oil sending unit and tried to put a manual gauge to see if it was right can't find the right pass used to … read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
80 satisfied customers
I have a Kenworth truck with a C15 engine. It is flashing
I have a Kenworth truck with a C15 engine. It is flashing ACERT codes 34, 28 & 95 with high fault counts for each. I know that these codes may have to do with the Primary & Secondary Engine Speed/Timi… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Can yo turn the solenoid on an injector? The one I got when
Can yo turn the solenoid on an injector? The one I got when mounted causes the wires to overlap the head.… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
604 satisfied customers
05 c15 getting oil in fuel tanks using a gallon of oil every
05 c15 getting oil in fuel tanks using a gallon of oil every 1000 miles … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
2007 Cat C15 Acert, 1.2 million miles. I have an exhaust
2007 Cat C15 Acert, 1.2 million miles. I have an exhaust gasket leaking and there is oil/wetness underneath the leaking exhaust port. Is this normal? It does not seem to use much oil, maybe 1 gallon e… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,947 satisfied customers
CatMan, can you explain the correct way to do a compression
CatMan, can you explain the correct way to do a compression test on a c15 cat using an adapter made to go into injector bore. Do I take all the rockers off so no valves open and then use the starter t… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Have a 2004 peterbilt with caterpillar c15. It has been
Have a 2004 peterbilt with caterpillar c15. It has been sitting for 4 years. Fresh batteries put in but it is very slow to turn and starter getting hot. Was running when put up. Won't run. Any suggest… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Cat Man, I need to overhaul a cat c13 KCB78215. I have done
Hey Cat Man, I need to overhaul a cat c13 KCB78215. I have done a couple c15s with no trouble but this engine is a lot different. Why would the head be so full of carbon buildup when this engine doesn… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I am now working on a T660 2008 With a Cat engine C15 twin
Hello i am now working on a T660 2008 With a Cat engine C15 twin turbo with DPF it seemed to burn alot of oil like 4 gallons on a 2300 mile run… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a cat c15 esn spd02720. We are looking to buy this
Hello i have a cat c15 esn spd02720. We are looking to buy this unit for a company truck. The sales yard told us that the regen system was deleted. Is there way you can tell.is i get a screen shot and… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Pearl JA: We'll do all we can to help. Tell me a bit
do you know the cause of broken valve springs? MXS C15 … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I just did my first inflame on a Cat C15 serial prefix SDP.
I just did my first inflame on a Cat C15 serial prefix SDP. Before I start it for the first time is there anything special I should do? Also i lathered up the liner with clean oil on top and bottom of… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
how do you extract the cooler vains from a c15 cat oil cooler
how do you extract the cooler vains from a c15 cat oil cooler ????? as i would like to repair or block a few of the offending vains… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
hello i have a cat c15 acert, i have alot of oil comeing out
hello i have a cat c15 acert, i have alot of oil comeing out of blowby tube, i just put two new turbos and a new compressor, but ive heard from other acert owners that cat has this problem with the ac… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 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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