[Shop-talk] OEM Spark Plugs

[Bob Spidell]

Those 'long' plugs are notorious, at least in some Ford V8 engines. The 
long threaded part is long so the plug tip will reach the combustion 
chamber in thick OHC engine heads. Those--the Ford plugs--are made in 
two parts, and are known to separate when being removed. Much hilarity 
ensues.

On 4/16/2022 9:30 AM, Pat Horne wrote:
> I was just thinking about this thread the other day!
>
> I’ve never seen these plugs before. I just pulled the plugs on my 06 
> caravan & thought IT had long plugs. Must be an odd feeling when you 
> unscrewed them.
>
> Peace,
> Pat
>
> Pat Horne
> We support Habitat for Humanity
>
>
> On Apr 16, 2022, at 11:25 AM, Jim Stone <1789alpine at gmail.com> wrote:
>
>  It has been quite a while since I asked this question but I finally 
> got around to putting in the new plugs yesterday and wanted to share 
> my thoughts now that I have some experience.
>
> The bottom line is consistent with the general consensus of the group: 
> I could not see any difference between the original plugs and the new 
> ones. Here are a couple of photos:
>
> image0.jpegimage1.jpegimage2.jpeg
>
> We’re on the road right now (my wife is driving) and there is no 
> discernible difference that I can feel.
>
> So, to confirm the group’s answer to my original question for anyone 
> else who might be curious, I’d say there is no reason to pay the 
> ridiculous OEM markup for the exact same part.
>
> Jim
>
> Sent from my iPhone
>
>> On Oct 21, 2021, at 7:34 PM, Jim Stone <1789alpine at gmail.com> wrote:
>>
>> My 2017 Honda Ridgeline is approaching its 105,000 mile service, 
>> which is a big one.  New timing belt is the main event, but Honda 
>> also recommends new spark plugs.  I did the timing belt on my old 
>> Ridgeline at 220,000 (it’s 3rd belt) but it was a PITA and I don’t 
>> think I want to take any chances on a newer, more valuable vehicle. 
>>  Spark plugs are a different story and the dealer gets over $300 to 
>> do those!
>>
>> The reason changing plugs is so expensive is Honda’s price for the 
>> plugs themselves.  They list at $55 _each_, although you can get them 
>> discounted for the low, low price of about $40 each if you shop 
>> around. 
>> https://www.hondapartsconnection.com/oem-parts/honda-spark-plug-dilzkr7b11g-ngk-12290r9pa01 
>>  But, here is where it gets interesting: The owner’s manual lists the 
>> plugs as NGK DILZKR7B11G, a number you can clearly see on the Honda 
>> box in the above link.  NGK lists that plug as $18 each 
>> (https://www.ngk.com/ngk-95350-dilzkr7b11g-laser-iridium-spark-plug) 
>> and you can find them at Rock Auto for about $12.
>>
>> Ridgeline owners seem to be divided as to whether the plugs in the 
>> NGK box are any different from the ones in the Honda box.  I trust 
>> this group more than fellow Ridgeline owners.  What do you guys say? 
>>  Are the plugs in the Honda box likely to be different and worth an 
>> extra $170?
>>
>> Jim
>
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