Steve155

OK going to change my plugs - figure 90K miles and 11 years probably time...haha...anyhow who recommends what and why? Please keep in mind I'm moving to So Cal from Washington state so I will be in warmer temps on a regular basis so anything to know about from a plug standpoint there as well? Thanks in advance!

austinholloman

https://mbworld.org/forums/c36-amg-c...ugs-wires.html

https://mbworld.org/forums/c36-amg-c...parkplugs.html

MarcusF

In general, the temperatures in Southern California have nothing to do with which plugs to use (one exception possibly being if you move to Mohave and spend a lot of time at Willow Springs). Here's a short blurb on plugs.

After 11 years, I hope the plugs come out without any issues.

Steve155

Austin and Marcus thanks for the links! As always the best place for info is hee!

austinholloman

So at the end you say, stock plugs for a stock car. What do you consider stock? If someone has a dyno tune, no 2nd cat and res delete with k&n filters, is that stock? Even headers and pulley? Or do you mean FI and major mods to the engine?

DRBC43AMG

I can imagine that those type of mods are aimed at optimizing the engine, even if you gain a little extra power. Major mods for me would be cams, SC or Turbo, increased compression, etc. Different (colder) plugs may then be necessary.

austinholloman

So iridium plugs aren't a good idea? Or does that matter at all?

austinholloman

Anyone here running Denso's? You can get these in the OEM temp range. I've heard great things about them but they are $$$


http://www.densoiridium.com/faq.php

DRBC43AMG

True, but they are $$$$$$$ Why not stick to OEM plugs. If AMG and MB recommend them, there must be a good reason, so why pay more?

StapleGun

As in my post (second link) posted by Austin H - I used the Denso and am really happy with them, you're not going to go wrong with the Bosch, I might add.

Biggest caution (make your life simpler) MAKE SURE YOU GET EXTENSIONS THAT LOCK YOUR SOCKETS) - Sears has them

RANDY_P

OE spec plugs, don't mess with anything else. Hi tech spark plugs are way high on the snake oil scale.

rjp

austinholloman

I just found out from the orig owner today, mine we all changed at 95k along with fuel filter. So I am skipping plugs until a later date and changing the fuel filter for sure. It has 30k miles on it!

Jasssc

just changed my fuel filter, it was definitely needed!
sparkies are next!
buying from autohausaz, great products and prices!

should i go ahead and do wires too?
i don't know the last time they were changed

Steve155

going with the stock plugs - keep it simple!

RANDY_P

Run an ohmmeter across all three and note if any are different than the others.

Unless the wires are obviously damaged just leave them. They rarely fail since they are just copper leads with resistor ends.

Do get 3 new coil boots tho and lots of dielectric grease.

rjp

Outlawlatemodel

i changed mine cant remember to what took 2 hrs and im experienced be ready to perform hand tricks, anyway my fuel mileage went down, i think i am gonna put oe back in theis summer, i mean i lost like miles per gallon

Jasssc

can you try and remember what you put in?
because losing enough mpg to where you can notice it is not good

StapleGun

Don't ever change plugs on a warm or hot engine - you WILL screw up the threads in your cylinder heads. I don't torque my plugs, I snug down and go a half turn (maybe 3/4) and I also use a touch of anti-seize on the spark plug threads.

It is an easy DIY - I did a POST on here a while ago, you just have to take your time and don't yank on any of the high-tension leads. I would highly recommend you obtain ratchet extensions that lock your sockets.

I used Denso Iridiums - you will never go wrong with the OEM Bosch.

DRBC43AMG

Nice reminder of the proper way to do it Thanks

StapleGun

Please PM if you need help or have questions let me know, I'll give you my number and you can call me...

ohlord

Need anti seize.
The plugs are treated
More plugs are damaged by using it and not needed so why risk the damage

Motorsport3

I have brand new set of 16 Denso Iridium 16 (correct heat range for c43). Let me know if you want them I can let it go for $100.00
I also have magnecor Kv 85 for our car and I can let that go for $120.00!!

StapleGun

Oh lord, I have never had any problems with it (anti-seize) and I've used on dozens of vehicles, motorcycles and boat engines - when you did have an issue, what happened when you state 'damaged' tell what the damage to the plugs or otherwise was specifically?

The only time I would advise against it use is for O2 sensor applications....

JohnnyRock

Motorsport, did anyone ever take you up on your offer?

cm60k

Many types & brands can find in Markets,, im only comfortable with iridiums "NGK BKR5EIX & Denso IK16".........

ZAYED,,