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-   -   Getting to spark plugs in hemi (http://www.jeepgarage.org/f73/getting-to-spark-plugs-in-hemi-13533.html)

rdalcanto 10-02-2010 11:28 PM

Getting to spark plugs in hemi
 
The manual says that on the V8, you need to replace the spark plugs every two years. Anyone take a peak yet to see how difficult that is to do yourself? How much disassembly is required? :eek:

dpope 10-03-2010 10:53 AM

Re: Getting to spark plugs in hemi
 
Quote:

Originally Posted by rdalcanto (Post 278449)
The manual says that on the V8, you need to replace the spark plugs every two years. Anyone take a peak yet to see how difficult that is to do yourself? How much disassembly is required? :eek:

Every 2 years. :eek: I'm used to my tahoes and 100k. Is thus vehicle going to cost more for maintenance? 2 years without support of mileage doesn't seem right.

5.7Unlimited 10-03-2010 11:17 AM

Re: Getting to spark plugs in hemi
 
$40 every two years! OH NO!!

seriously though i'm sure i'd be fine up to 40,000miles.

Chaoul1 10-03-2010 11:31 AM

Re: Getting to spark plugs in hemi
 
I just replaced my spark plugs on my 05' WK 5.7L in April and I definitely know that they haven't been replaced.

wk2silverbullet 10-03-2010 11:33 AM

Re: Getting to spark plugs in hemi
 
that is what the manual says. I am wondering if this is because of the switch from 8 to 4 cylinders that occurs in eco mode.

rdalcanto 10-03-2010 01:02 PM

Re: Getting to spark plugs in hemi
 
Quote:

Originally Posted by wk2silverbullet (Post 278540)
that is what the manual says. I am wondering if this is because of the switch from 8 to 4 cylinders that occurs in eco mode.

I'm thinking that must be it, because on the 6 cyclinder the manual recommends replacement at 6 years I think (can't remember the mileage)

mjl2610 10-03-2010 01:18 PM

Re: Getting to spark plugs in hemi
 
If you are talking about the engines with copper plugs then yeah they recommend a replacement every 30k miles because they are regular champion or bosch copper plugs. However, at the 33k mile mark or so I ended up getting the champion platinum power plugs number 3340 that are virtually identical to the oem copper ones, but platinum, and this way I wont think about replacing them until i have 130k on the clock. I will also say my performance and gas mileage did not improve nor did it decline with these plugs. They just work with zero issues. I now have almost 55k on the jeep. There are however some peeps that are very particular about using oem plugs even if it is copper. Either way I feel you cant go wrong. I have a 4.7L but if you hemi people want to get platinum replacements just make sure you get the same brand and same spec plug in a platinum variant.

whatevrworks 10-03-2010 03:08 PM

Usually the rational behind having a time limit of 2 years is not that they wear out but that it's a good idea to remove them thY often because with all he heat/cold cycles they can end up seizing up in there and you might not get them out without screwing up the threads and dropping some serious change to have that fixed. If you really want you can just remove and replace to prevent problems. But if you are going through the effort to get at them you might As well replace them.

nek121328 10-03-2010 06:04 PM

Re: Getting to spark plugs in hemi
 
The Champion Double Platinum plugs have a 5 year unlimited mileage warranty. The OE plugs are Copper Core to keep the price down. Unfortunately, they require replacing before 36,000 miles.

cain45 10-03-2010 06:33 PM

Re: Getting to spark plugs in hemi
 
The OEM copper ones need replacing every 30K miles regardless of what engine they are in. I have a 3.7 Laredo and a 5.7 Hemi and both manuals state every 30K.

jpsmith 10-03-2010 07:52 PM

Re: Getting to spark plugs in hemi
 
The 3.6L comes with 100k plugs, but the 5.7 comes with 30k plugs. I haven't changed them, but my dad said having the work done on his '05 Ram was no picnic. It didn't have MDS, but he chose not to do the work himself to save a bit of headache. He said you can't get at the plugs for the back 4 cylinders easily - maybe he said the manifold had to be removed? I can't remember exactly. But I'm not looking forward to it. Changing them on the 3.7L in my KJ took about 45 minutes.

Chaoul1 10-03-2010 07:59 PM

Re: Getting to spark plugs in hemi
 
I did my spark plugs by myself. It took me about 1 hour with the right set of tools. It's a pain to get the Spark Plugs in the back. Just take your time. I'm going to try and replace them every 20k-30k. I might try the NGK Plugs next time.


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