Scared!


#1

My 2004 silverado has 116000on the clock and I know it needs new plugs, but I am scared that all that time the plugs have had time to seize in the aluminum heads.
I am afraid that one or more will tear out the threads resulting in pulling the heads to repair. Do I really need to worry or am I over thinking?
Is there anything I can do to prevent this or do I just go for broke and deal with whatever happens?


#2

Can’t tell unless someone attempts to remove the plugs.

Tester


#3

You will be fine, if you had a Ford that would be a problem.


#4

Why if it was a Ford? What is the difference?


#5

Be sure it’s dead cold when you do it. If a plug won’t turn don’t force it. Even at that mileage I doubt you will have a problem


#6

@Cw400‌

Don’t worry. We have tons of gm trucks just like yours in our fleet, and we haven’t really encountered any problems with broken or stuck plugs

Now a Ford would be a different story. Some of the 2V Tritons like to blow the plugs out, taking the female threads and the coil with them. Some of the 3V Tritons have mile-long plugs that often break during removal, unless you have the OTC 6918 removal tool. And if one does break, you’ll more than likely be using a Lisle special tool to extract them.

Moving on . . .

A bit of advice . . . Buy a new set of spark plug wires. They have a particular tendency to break when removing them on your engine. I’m assuming you have either the 5.3 V8 or the 6.0 V8

A colleague . . . non-mechanic . . . asked me for advice before doing the plugs on his 2004 Sierra. I told him to have a fresh wire set on hand, before removing the plugs. He didn’t take my advice. A few days later, he dropped by and said he didn’t have problems replacing the plugs, but after he started the engine, the check engine light came on and there was a clicking noise from one single wire

I gave the cheapskate a good used spark plug wire and sent him on his way. A few days later, he again dropped by and said the clicking had stopped as soon as he replaced that wire.

Hopefully, I was able to answer your questions


#7

Ford has a issue with their spark plug design on the triton motors. You need special tools most of the time due to the plugs breaking in the head.


#8

One advantage you have with your 2004 Silverado is that the engine sits longitudinally and not transversely. This makes the plugs easier to service.


#9

@SteveC76

“Ford has a issue with their spark plug design on the triton motors.”

That’s wording it nicely

I would have said “Ford s . . . . . . d the pooch with their spark plug design on the triton motors.”

Have you tried out the OTC 6918 tool yet?