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I’m looking at the injector cups to see if I need to replace them. Using a mirror and light and I’m finding residue in the cups. Is this normal to see or should I order new ones and tools to replace them?
I would not replace the cups if they are not leaking ( not a fun job by any means). Your best bet would be to pressure test the coolant system while the injectors are out. If you do need cups use the riff raff diesel injector cup removal tool, it works awesome
I would not replace the cups if they are not leaking ( not a fun job by any means). Your best bet would be to pressure test the coolant system while the injectors are out. If you do need cups use the riff raff diesel injector cup removal tool, it works awesome
I will see if I can fill it and pressurize it with the engine out of the truck.
I wouldn't be too concerned about the residue, especially since it cleans up so nicely.
My experience has been that when they crack, the cracks run longitudinally, and they are not so easy to see. The best bet is to pressurize the cooling system to 10-15 psi, then brush soapy water inside each cup and look for bubbles. Also around the top, where the cup meets the head. You don''t have to have coolant in it, you can just block off all of the hose fittings and run compressed air into one of them.
As far as just changing them out preventatively, I guess it depends on how many miles are on the engine, and also how many times it's been started and shut off. In my opinion, the cracks form due to heat cycling, so I think a truck that has a lot of miles but was run all day is probably less likely to have fatigued cups.
If you are inclined at all to change the cups, doing it while the engine is out of the truck is the ticket. What makes the job tedious is when you have to do it in the truck. If you can do it out on an engine stand, it's not a big deal.
I used the Riff Raff stainless steel cups, and they are great. The stainless should hold up a lot better to the thermal cycling. Also the Riff Raff removal and installation tool that you can rent works really well.
If you decide to do the job, my strongest advice to you would be to make sure that you have a well-calibrated torque wrench, and clean all the threads on the hold-down bolts and in their holes really well, then use high-temperature Loctite when you put them back in. Having to do this job over when it's in the truck is definitely a PITA.
If I were refreshing an old motor, out on a stand, I would do it.
I wouldn't be too concerned about the residue, especially since it cleans up so nicely.
My experience has been that when they crack, the cracks run longitudinally, and they are not so easy to see. The best bet is to pressurize the cooling system to 10-15 psi, then brush soapy water inside each cup and look for bubbles. Also around the top, where the cup meets the head. You don''t have to have coolant in it, you can just block off all of the hose fittings and run compressed air into one of them.
As far as just changing them out preventatively, I guess it depends on how many miles are on the engine, and also how many times it's been started and shut off. In my opinion, the cracks form due to heat cycling, so I think a truck that has a lot of miles but was run all day is probably less likely to have fatigued cups.
If you are inclined at all to change the cups, doing it while the engine is out of the truck is the ticket. What makes the job tedious is when you have to do it in the truck. If you can do it out on an engine stand, it's not a big deal.
I used the Riff Raff stainless steel cups, and they are great. The stainless should hold up a lot better to the thermal cycling. Also the Riff Raff removal and installation tool that you can rent works really well.
If you decide to do the job, my strongest advice to you would be to make sure that you have a well-calibrated torque wrench, and clean all the threads on the hold-down bolts and in their holes really well, then use high-temperature Loctite when you put them back in. Having to do this job over when it's in the truck is definitely a PITA.
If I were refreshing an old motor, out on a stand, I would do it.
I put a constant 15psi in and did soapy water with no bubbles. I’m going to run these for now. I’ve got another engine that I’m planning to rebuild. I’ll put the stainless cups into it. My pressure setup was done using the old radiator hoses and some pvc adapters. I hooked the hose from the right head to the water pump.
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