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The six bolts broke that holds on the harmonic balancer on
The six bolts broke that holds on the harmonic balancer on my e7 350 mack engine … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,398 satisfied customers
I have 1998 mack rb688s with a e7 350 engine losing power
i have 1998 mack rb688s with a e7 350 engine losing power going up a incline I just got the the headed and injectors done on it. It still smoke a lot tht color of the smoke is black … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
Im trying to find a trouble shooting code for Rack Position
Im trying to find a trouble shooting code for Rack Position Sensor -Voltage above normal or shorted to high SID 24, FMI 3 … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
402 satisfied customers
What is average life of mack engine. E7 350 hp ch613. RUNS
what is average life of mack engine JA: What's the make/model/year of your truck? Engine type? Customer: E7 350 hp ch613 JA: Are you fixing your truck yourself? What have you tried so far? Customer: R… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
402 satisfied customers
1993 Mack e7 300 engine looses fuel prime to first filter
1993 Mack e7 300 engine looses fuel prime to first filter have replaced lift pump, spring was brke in old pump but still loosing fuel to first filter … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
402 satisfied customers
I just need the cylinder head torque spec sfor e7 355/380
Hi i just need the cylinder head torque spec sfor e7 355/380 motor … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
402 satisfied customers
I have a 1985 mack r model value liner and it has the alum
i have a 1985 mack r model value liner and it has the alum front main bolts to it and i have broke both sides of it where it bolts to the frame at different times did somebody ever make a after market… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,398 satisfied customers
81 mack with 350hp engine is using 1gal oil in 30 mi trip. I
81 mack with 350hp engine is using 1gal oil in 30 mi trip. I had valve seats done and blower cleaned up. Can it be a cracked piston ring? … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
Are 1992 and 1998 e7 350 hp turbochargers interchangeable?
are 1992 and 1998 e7 350 hp turbochargers interchangeable? … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
I have a 03 Mack E7 427 engine it runs hot with thermostats
I have a 03 Mack E7 427 engine it runs hot with thermostats in you can take them out and it does not get above 160 degrees empty soon as you put thermostats back in it starts running hot what could be… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
Where is the fuel return shut off on an E7 98 model Mack. It
Where is the fuel return shut off on an E7 98 model Mack. It won't keep a prime. … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
I have a E7 427 mack with elec fuel pedale, it run rough and
i have a E7 427 mack with elec fuel pedale, it run rough and smoke white and blue , injector seem fine advance timming selenoide had a broken Oring … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,398 satisfied customers
95 Mack no power to injectorv pump. Bypassed ran power t
95 Mack no power to injectorv pump. Bypassed ran power t fuel shut off unit starts but at 3500 rpm. Could fuel controller be bad. How can I be sure cost 2800… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,398 satisfied customers
checking out an 89 superliner on Tuesday e9500..are they a
checking out an 89 superliner on Tuesday e9500..are they a dependable engine ??best rpm for cruise?? cost to maintain/overhaul etc??would be used to pull cement tankers up to 62000kg gvw… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
Can you help me with the engines Mack produced and the
Can you help me with the engines Mack produced and the differences in them also how to distinguish the difference . Like the E7 to the MP series etc. The date range I would be looking for is from the … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I have a 1997 mack truck it has a e7-350 engine it starts fine
I have a 1997 mack truck it has a e7-350 engine it starts fine after a short time a yellow light comes on malfunction electronic comes on low idle runs good when I speed up it starts to miss and smoke… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
Current truck Mack Quantum with 975.000 km with an Ea7 engine.
Current truck Mack Quantum with 975.000 km with an Ea7 engine. The truck uses about 1litre of oil every couple of thousand ks. What HP is this engine and how many more ks can i expect before running i… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
Which mechanical engine R Model Mack Truck?New venture:
Which mechanical engine R Model Mack Truck? New venture: I am looking to purchase a good, used daycab tractor to pull chip and/or log trailers in SE Virginia. I am really considering an '80s vintage R… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

11,398 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,234 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

4,023 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,740 satisfied customers

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

cumminsdr

cumminsdr

Mechanic

1,700 satisfied customers

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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