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  #1  
Old 06-18-2009, 09:17 AM
DJM DJM is offline
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Injector O rings

How do you know when you need to change out the O-rings? Loss of power real bad mileage? I havn't realy noticed either but I was gona do the glow plugs here soon so figured while I had the covers off I would replace them. I have about 138k miles on the truck.
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Old 06-18-2009, 09:41 AM
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Unless you have signs of bad O-rings I would not do them. In fact unless you have signs of a bad injector I would not even pull the injector.

If you remove the injector you have to install new O-rings.

As for the glow plugs, why are you going to do them. Do you have a hard cold start problem.

Why spend money when it is not needed. Was the truck hard starting last winter. If not then why install new glowplugs.
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Old 06-18-2009, 09:51 AM
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Quote:
Originally Posted by DJM View Post
How do you know when you need to change out the O-rings? Loss of power real bad mileage? I havn't realy noticed either but I was gona do the glow plugs here soon so figured while I had the covers off I would replace them. I have about 138k miles on the truck.
Not a bad idea, and for a 100 bucks it is easy to do. I pulled mine at 100k to stick in a set of hybrids and I had a couple bad Orings. It was good that I pulled them when I did.

Plus you have to pull the glow plugs to install new Orings... I would do it at 138K...

If you need any help just let me know, I am not too far from you... LOL I work in Harrisburg..LOL
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Old 06-18-2009, 10:02 AM
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Quote:
Originally Posted by layson View Post
Not a bad idea, and for a 100 bucks it is easy to do. I pulled mine at 100k to stick in a set of hybrids and I had a couple bad Orings. It was good that I pulled them when I did.

Plus you have to pull the glow plugs to install new Orings... I would do it at 138K...

If you need any help just let me know, I am not too far from you... LOL I work in Harrisburg..LOL
You have to do what, There is no need to pull the glowplugs to pull the injectors.
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Old 06-18-2009, 10:08 AM
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You have to get the oil and fuel out of the cylinders. there are other ways to do this, the glowplugs are easy to pull out.
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Old 06-18-2009, 10:19 AM
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Quote:
Originally Posted by layson View Post
You have to get the oil and fuel out of the cylinders. there are other ways to do this, the glowplugs are easy to pull out.
Remove the plugs on the HPOP rails on the cylinder heads. Use a mighty vac pump. Suck the oil out of those rails prior to removing the injectors.

A lot better then cranking the engine over with the glowplugs removed spraying oil all over.
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Old 06-18-2009, 10:26 AM
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Originally Posted by bigcountrysg View Post
Remove the plugs on the HPOP rails on the cylinder heads. Use a mighty vac pump. Suck the oil out of those rails prior to removing the injectors.

A lot better then cranking the engine over with the glowplugs removed spraying oil all over.
I am not going to sit here and argue which system is better. This is just the way I do it.

You don't spray oil all over the place. You just stick two bolts loosely holding the valve covers on.

You can pull those plugs if you want. But I don't want to strip out any of those plugs since they have been know to strip out.

It is real easy to pull the glow plugs, then turn the motor over by hand 10 times with the VALVE covers loosely fastened on. Then you crank the motor over with the starter with nothing hooked up. That is the way I do it... I don't want ANY chance of hydro locking the motor...
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Old 06-18-2009, 10:31 AM
DJM DJM is offline
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Well i know I have a bad glow plug or more been puttin it off I have done a few glow plug installs no big prob there just figured i would do the O-rings while I had the valve covers and stuff off I have just never pulled an injector. Im not doin the plugs for a while but was just curious about the O-rings.
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Old 06-18-2009, 10:37 AM
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Quote:
Originally Posted by DJM View Post
Well i know I have a bad glow plug or more been puttin it off I have done a few glow plug installs no big prob there just figured i would do the O-rings while I had the valve covers and stuff off I have just never pulled an injector. Im not doin the plugs for a while but was just curious about the O-rings.
Unless you have signs of bad O-rings I would not pull the injectors to do them. I would do the glowplugs and that is it. Why mess with something that is not broken.
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Old 06-18-2009, 10:37 AM
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Quote:
Originally Posted by DJM View Post
Well i know I have a bad glow plug or more been puttin it off I have done a few glow plug installs no big prob there just figured i would do the O-rings while I had the valve covers and stuff off I have just never pulled an injector. Im not doin the plugs for a while but was just curious about the O-rings.
The injectors are not too bad to pull. It is probably a 4 hour or so job for the first time...


It isn't a bad idea. I didn't have any symptoms of a bad injector oring on my truck before I pulled mine. There were two that were pretty torn up. So I was glad I did it.

But they could all be just fine too?? You never know..
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