Shark11408 Posted January 8, 2023 Share Posted January 8, 2023 Ok I have begun an injector cup job on my Mack MP8. Well I spent a lot of money on special tools to get this job done. Well cylinder 1 first injector cup I attempt is stuck. Will not come out no matter what I do. I have tried my heat gun and spraying a white lithium grease(not a lot) but not is working. The cup just won’t come out. Any suggestions ?? Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/ Share on other sites More sharing options...
Onyx610 Posted January 8, 2023 Share Posted January 8, 2023 What tool are using to pull it? Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-520477 Share on other sites More sharing options...
Shark11408 Posted January 8, 2023 Author Share Posted January 8, 2023 Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-520478 Share on other sites More sharing options...
Shark11408 Posted January 8, 2023 Author Share Posted January 8, 2023 https://ferrumtools.net/products/fe_volvo6?variant=31679000608811¤cy=USD&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&gclid=EAIaIQobChMIpunmxri2_AIV7smUCR3Y5gPIEAQYAiABEgJ5VPD_BwE Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-520480 Share on other sites More sharing options...
Joey Mack Posted January 8, 2023 Share Posted January 8, 2023 In the olden days, we used to tap threads into the cup where the injector tip fits in, and use a puller with the correct threaded end on it.. We put grease on the tap to collect the millings, and keep them from falling into the cylinder.. This was before the knurled puller was around. Of course that was for the copper cups, but I bet you could do it with the cups you have.. There should be a few more posts on this coming soon.. Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-520481 Share on other sites More sharing options...
Onyx610 Posted January 8, 2023 Share Posted January 8, 2023 Tool keep slipping out? I have heard of this issue before but never ran into it. I suspect a lot of carbon build up around it. This guy had same issue, looks like you have to do what you got to do with out damaging the bore. Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-520482 Share on other sites More sharing options...
Onyx610 Posted January 8, 2023 Share Posted January 8, 2023 However those were copper… Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-520483 Share on other sites More sharing options...
Shark11408 Posted January 8, 2023 Author Share Posted January 8, 2023 Yes the tool keep coming out without the cup attached no matter how tight I have it Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-520484 Share on other sites More sharing options...
Joey Mack Posted January 8, 2023 Share Posted January 8, 2023 does the tool, grab the inside off the cup with knurled jaws that are opened up using a jack screw? Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-520485 Share on other sites More sharing options...
Onyx610 Posted January 8, 2023 Share Posted January 8, 2023 (edited) I wonder if anyone has ever tried putting some weld on the inside like a dry liner? Edited January 8, 2023 by Onyx610 Spelling Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-520486 Share on other sites More sharing options...
Onyx610 Posted January 9, 2023 Share Posted January 9, 2023 Maybe you could try and blast it a few times with an air hammer. Maybe it will rattle it loose some. Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-520543 Share on other sites More sharing options...
Joey Mack Posted January 9, 2023 Share Posted January 9, 2023 I still havent heard if he is using a 'tap' to cut threads in the cup, or using the knurled tool that grabs the inside of the upper area of the cup.. Tapping threads should do the trick... then use a puller.. Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-520546 Share on other sites More sharing options...
Onyx610 Posted January 9, 2023 Share Posted January 9, 2023 He’s using the expanding collet style 1 Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-520547 Share on other sites More sharing options...
Shark11408 Posted January 9, 2023 Author Share Posted January 9, 2023 I am going to try the tap method. I just have to find the right tool to pull it after the tap. Any suggestions ??? Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-520568 Share on other sites More sharing options...
Joey Mack Posted January 9, 2023 Share Posted January 9, 2023 (edited) I believe the tap we use was 8mm x1.25.... however, 5/16" will work and you get threaded rod and some nuts and washers at any hardware store, and make a puller. It would be good to make a puller that allows you to see the cup move upward.. maybe use a piece of pipe that fits over the hole.. Edited January 10, 2023 by Joey Mack Pore cell fone sperring 1 Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-520573 Share on other sites More sharing options...
fjh Posted January 15, 2023 Share Posted January 15, 2023 On 1/9/2023 at 4:19 AM, Joey Mack said: I believe the tap we use was 8mm x1.25.... however, 5/16" will work and you get threaded rod and some nuts and washers at any hardware store, and make a puller. It would be good to make a puller that allows you to see the cup move upward.. maybe use a piece of pipe that fits over the hole.. Note if you do any type of taping on on these be sure to have the valves closed on each cylinder your working on and blow that cylinder out clean befor moving to the next! there have been a fare few turbo failures due to fragments after doing this job! Joeys ready rod trick may be worth a go there some big washers on top to wined on makes good sense! Just sayin! Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-521345 Share on other sites More sharing options...
Joey Mack Posted January 15, 2023 Share Posted January 15, 2023 (edited) if you put grease on the tap it helps to collect the millings.. not perfect but better than nothing.. and like 'FJH' says... valves closed.. which will be the case, as the rocker shaft will be off the engine during this repair.. Jojo Edited January 15, 2023 by Joey Mack more content needed Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-521350 Share on other sites More sharing options...
fjh Posted January 16, 2023 Share Posted January 16, 2023 9 hours ago, Joey Mack said: if you put grease on the tap it helps to collect the millings.. not perfect but better than nothing.. and like 'FJH' says... valves closed.. which will be the case, as the rocker shaft will be off the engine during this repair.. Jojo Yup me dumb like stick bro didn’t remember the rocker scenario! Oh well like I said am no guru on this red stuff! Didn’t get to involved Thankfully!😌 1 Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-521443 Share on other sites More sharing options...
Joey Mack Posted January 16, 2023 Share Posted January 16, 2023 Its all good and funny too... Hell I do it a bunch.. We just make it funny instead of pissy.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-521444 Share on other sites More sharing options...
fjh Posted January 16, 2023 Share Posted January 16, 2023 12 hours ago, Joey Mack said: Its all good and funny too... Hell I do it a bunch.. We just make it funny instead of pissy.. Yup Its hard to fit a size 12 steel toe in there sometimes and its a tough chew ! I should maybe take my shoes off and try!😂 2 Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-521731 Share on other sites More sharing options...
Rsc1717 Posted February 3, 2023 Share Posted February 3, 2023 Here is the cup puller I used had issues with the Ferrum tool as well . The problem is with the Ferrum tool you cannot tighten it up much or it will lose its grip and fail . So best choice make threads nice and slow put grease while making threads so shavings stick to grease without failing on cylinder . I used that high pressure grease you are going to use to install cups . Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-524478 Share on other sites More sharing options...
Joey Mack Posted February 3, 2023 Share Posted February 3, 2023 That's great, Im glad that worked.. I knew it would, actually.. when I learned how to do these cups, that was the procedure.. 😃. Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/71003-2015-mack-mp8-injector-cups/#findComment-524479 Share on other sites More sharing options...
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