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Mack trident mp8-500 injector cups


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Hello new to the forum I have been watching videos of the injector cup replacement on the volvo d13 mp8 and notice they use a graphite paste on the injector while I think in Australia they use a washer. Do u need to use paste aswell as the washer? Which way is better?

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On 2/13/2022 at 6:04 PM, Ausmack1 said:

Hello new to the forum I have been watching videos of the injector cup replacement on the volvo d13 mp8 and notice they use a graphite paste on the injector while I think in Australia they use a washer. Do u need to use paste aswell as the washer? Which way is better?

In North America,  the copper injector cups were replaced with steel cups because apparently they were to solve the issues with combustion gases passing the cup. I say apparently because this did not eliminate the issue. The graphite paste was used with the steel cups and the washer with the plastic coating was used with the copper cups. These can not be interchanged because the injectors are physically different. 

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On 2/13/2022 at 3:04 PM, Ausmack1 said:

Hello new to the forum I have been watching videos of the injector cup replacement on the volvo d13 mp8 and notice they use a graphite paste on the injector while I think in Australia they use a washer. Do u need to use paste aswell as the washer? Which way is better?

And so you answer is no! To different concepts one debatably better than the other! If these guys had got rid of the dollar store  plunger injection system and installed a proper hpcr system!  these would be almost bullet proof engines ! They cheaped out yet again!

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1 hour ago, fjh said:

And so you answer is no! To different concepts one debatably better than the other! If these guys had got rid of the dollar store  plunger injection system and installed a proper hpcr system!  these would be almost bullet proof engines ! They cheaped out yet again!

Both cup styles are crap. One worse than the other. Their new common rail engines still have cup issues. And lets not forget about their ishifts.

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