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Mack 427 engine has low oil pressure. 2002 Mack ch 613 with…

Mack 427 engine has...

Mack 427 engine has low oil pressure

Mechanic's Assistant: What's the make/model/year of your truck? Engine type?

2002 Mack ch 613 with a 2009 427 engine

Mechanic's Assistant: Are you fixing your truck yourself? What have you tried so far?

Changed main bearings , connecting rod bearings and oil pump

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Answered in 5 minutes by:
12/10/2020
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,609
Experience: Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel
Verified
Hello and thank you for using Just Answer. My name is ***** ***** I’d like to try and help. I am sorry that you are having issues with your truck. I know this can be frustrating. Please allow me a few moments to look over your question and I will be right back with you. Thank you
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Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
On your issue, how low of pressure are you getting? Have you verified it with a manual gauge?
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Customer reply replied 1 year ago
I put a manual gauge and it's about 5 psi on idle . If a rev the engine it goes up to 10 psi
Then shut down light comes on
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
Okay. There are 2 items that are common findings based on the information provided. One is a bad relief valve. This is located near the oil filter housing. The other is a plugged oil cooler. The oil coolers on these engines were really small finned inside and were known for plugging up internally.
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Customer reply replied 1 year ago
Ok will check that tomorrow, thanks
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
My pleasure. Have a good day.
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,609
Experience: Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel
Verified
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Mike Mcmillan
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,609
6,609 Satisfied Customers
Experience: Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel

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