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Wayne
Wayne, Journeyman
Category: Medium and Heavy Trucks
Satisfied Customers: 8437
Experience:  worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling
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Have 1981 Mack Mr 686s with EM6 -285 engine , failed Ontario

Customer Question

Have 1981 Mack Mr 686s with EM6 -285 engine , failed Ontario emissions annual test. Unable to remove the fuel injector nozzles from the heads . Have tried to pull the injectors using 3/8-24threaded rod resulting in thread pullout of fuel return adaptor fitting. Help please
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Wayne replied 1 year ago.
Hi I'm Wayne
I will help you with this
I am a old Mack man,
what we did ,is soak them with diesel fuel around the injector
the use a air hammer to jar them loose
use a blunt bit in there , not a chisel
this will knock them loose, then twist them back and forth
then you can pry out , Works every time
but does ruin the injectors, no core credit
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Customer: replied 1 year ago.
We are trying to save the cores for recalibration. Is there a high risk of damaging them ?
Expert:  Wayne replied 1 year ago.
Hi
Thank you for that
Not really if you stay hitting on the base and not
inj. line opening , and work around in a circle
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Expert:  Wayne replied 1 year ago.
Hi
I'm just following up with you
did my answer help
let me know
Wayne
Expert:  Wayne replied 1 year ago.
Hi
I'm just following up with you
Did my answer help
Let me know
Wayne