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Kenworth T660 with Cat C-15 sdp 21414 engine. Recently got
Kenworth T660 with Cat C-15 sdp 21414 engine.Recently got ultrashift clutch replaced and now I have crazy amount of greenish greesy stuff filled in my coolant tank its thick . But truck does not build… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,207 satisfied customers
I'm getting a blackish liquid coming out my weep hole on my
I'm getting a blackish liquid coming out my weep hole on my C15 Acert. There doesn't seem to be anything foreign in the radiator. I run Cat ELC. It's a new water pump too... any thoughts?… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
Do all acert c15 engines have a shunt line. mine doesnt seem
do all acert c15 engines have a shunt line. mine doesnt seem to have one … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,207 satisfied customers
I have a 2007 Peterbilt with a C15 Cat. Serial number
Hello, I have a 2007 Peterbilt with a C15 Cat. Serial number MXS98434. I have antifreeze in the oil and oil in the antifreeze. Do you have any suggestions of what my problem could be. New rebuild in F… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,207 satisfied customers
2005 Peterbilt 379 c15 acert cooling fan comes on at the
2005 Peterbilt 379 c15 acert cooling fan comes on at the correct temp. but noticed it will not stay on long enough to bring temp. down. shuts off fan prematurely. … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
2004 cat acert c15 Diesel engine over heats only when boost
2004 cat acert c15 Diesel engine over heats only when boost pressure reaches over 30 psi with light loads and 17 psi with heavy loads. No coolant loss or oil. Compression is good on all cylinders. Wil… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,207 satisfied customers
I have an O7 Freightliner where is a C15 acert twin turbo at
I have an O7 Freightliner where is a C15 acert twin turbo at 475 horse I've driven it over 300,000 miles recently I had an overheating issue and it cos they had to crack and I had it in the shop and I… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,207 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
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Cat man, 2002 international with C15 have to add some
Cat man, 2002 international with C15 have to add some coolant every so often , can not find external leaks. Engine oil is fine. Where else to check. Also, water drips off the blow by hose and it has m… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,207 satisfied customers
Been getting oil in coolant on isx 535hp. Changed oil
Been getting oil in coolant on isx 535hp. Changed oil coolers still happening. Dug deeper found #5 liner starting to gald. Had inframed and now still getting oil in water. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
1999 7AS 3126 Cat engine in a C6500 tow truck. The engine
1999 7AS 3126 Cat engine in a C6500 tow truck. The engine runs excellent with no symptoms other than massive amounts of engine oil being pumped into the cooling system. The oil looks to be mixing unde… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,207 satisfied customers
Well am back with this c15 acert running hot, have finally
Well am back with this c15 acert running hot , have finally figured out that I have no circulation in this engine ! New water pump, new rad , thermostat s new rad cap new oil cooler checked out great!… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,207 satisfied customers
We have an 07 pete with c15 acert its pushing antifreeze out
we have an 07 pete with c15 acert its pushing antifreeze out the overflow but only when the turbo boost is above 40 lbs head and head gasket has ben replaced cat has put it on dyno and nobody can find… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,207 satisfied customers
I have a 2009 peterbilt,it is wanting to build pressure in
I have a 2009 peterbilt,it is wanting to build pressure in the overflow tank.I changed the radiator cap,the hose between the radiator and reservoir is not plugged,I bypassed the precooler between the … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,207 satisfied customers
I have oil in the radiator in a Peterbilt c15 Acert. I have
I have oil in the radiator in a Peterbilt c15 Acert. I have changed the oil cooler and flushed the cooling system and the oil returns. I'm not seeing moisture on the dipstick. The transmission cooler … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,207 satisfied customers
I have a 2007 Peterbilt 379 with a C15 engine that is losing
I have a 2007 Peterbilt 379 with a C15 engine that is losing a lot of antifreeze but does not have any visible leaks other than the drain tube from the reservoir. It is building high pressure, but is … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,207 satisfied customers
I have C-15 550 TWIN TURBO CAT, WITH 470,000 MILES ON IT.last
I have C-15 550 TWIN TURBO CAT, WITH 470,000 MILES ON IT.last year my oil was mixing in my radiator. i had it in the shop and the oil cooler was replaced, radiator flushed etc. one year later the prob… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,207 satisfied customers
Hi i got 03 peterbilt with cat c15 6nz serial number had oil
Hi i got 03 peterbilt with cat c15 6nz serial number had oil in coolant changed water pump and thermostat by than we saw oil cooler is dirty so i changed that to after 2 weeks i see again little oil i… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,207 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

10,207 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

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worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

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ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

cumminsdr

cumminsdr

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All types of Cummins applications

Curtis B.

Curtis B.

Technician

1,571 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

Chris (aka-Moose)

Chris (aka-Moose)

Technician

353 satisfied customers

24 years of experience diagnosing & repairing

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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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