Replace the Injector Hold-Down Bolts on Your Diesel Injectors

Are you looking to replace the fuel injectors on your CAT 3406E, C15, or C15 ACERT diesel engine? If so, it's probably fair to assume that you want the best quality, highest functioning injectors you can get. And, if you're spending money on quality injectors, you want them to work correctly. 

But, sometimes injector performance can be affected by other components in your diesel engine. So, when you install new injectors, you'll want to make sure you're doing everything you can to ensure that you're maximizing the function of your injectors. 

That's where today's tech tip comes in. When you install new injectors in your diesel engine, make sure that you're also replacing the injector hold-down bolt. 



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Not sure if you need to replace your fuel injectors? Check out our post that goes through the signs it's time for new injectors


Why Should You Replace Your Injector Hold-Down Bolts?

Replacing the injector hold-down bolts is key to getting the most out of your new injectors. Our CAT 3406E, C15, and C15 ACERT injectors are all going to come with brand new injector hold-down bolts. There's even a decal on the box that states that the OEM recommends replacing the injector hold-down bolts every time. And there's another one that notes that the injector hold-down bolt is included in the box.


injector hold down bolt box decal | Highway & Heavy Parts


So, be sure you replace that bolt when you install the new injector. With the decals on the box, it might seem clear to a lot of people that this is what you're supposed to do, but we get cores back sometimes that have the old injector and the brand new bolt in the box. On those, it's obvious that new bolts weren't used when the new injector was installed. This can cause problems for you later on. So, make sure you put the new bolt in with your injectors every time. 

These hold-down bolts stretch and they can no longer hold the necessary torque. So, if you install a new injector with an old, stretched-out bolt, you won't be getting optimal function. On these CAT injectors, it comes standard in the box, so it's not even an additional part you have to remember to order. It's best to just replace your bolts when you're putting in the new injectors. 


cat injector hold down bolt | Highway & Heavy Parts


It's not just important to replace the bolts for your fuel injector. You might also want to replace your head bolts when your cylinder head is out of the engine. Check out our article to find out when it's important to replace your head bolts


Here at Highway & Heavy Parts, we are proud to bring you the highest-quality diesel engine parts. If you need parts for your engine, we can help! Our experts can answer your questions and help ensure that you're getting the right parts for your application. 


Do you need fuel injectors or other replacement parts for your diesel engine?  Call our ASE Certified Techs at 844-304-7688. Or, you can request a quote online.