Spark plugs brand: NGK vs NGK Iridium vs Bosch

[Ricky Bobby]

^I agree with Stephen to check the gap as well out of the box

[babyduke]

Thanks for all your input. Youtube videos on replacing E53 spark plugs seem to be for 4.4 engine which requires 8 pcs. Since mine's a 3.0i, I just need 6, correct? Are they located 3 on each side of the engine block when you take the cover off? Just wanted to clarify before ordering.

[mtthmpsn]

Yep. It's a straight six with all plugs on the US passenger side after you remove the engine caps, 2 10mm nuts, oil cap, engine cover, connectors and coils (see DIY link I sent earlier). The plugs near the firewall can be a bit tricky - you need a socket extension long enough to get to the plug but not so long that the ratchet hits the overhanging body. I also highly suggest a torque wrench with the new ones to ensure you don't under/over tighten (spec is in DIY; I think 18-20 ft-lbs).

[babyduke]

Originally Posted by mtthmpsn

Yep. It's a straight six with all plugs on the US passenger side after you remove the engine caps, 2 10mm nuts, oil cap, engine cover, connectors and coils (see DIY link I sent earlier). The plugs near the firewall can be a bit tricky - you need a socket extension long enough to get to the plug but not so long that the ratchet hits the overhanging body. I also highly suggest a torque wrench with the new ones to ensure you don't under/over tighten (spec is in DIY; I think 18-20 ft-lbs).

Thank you so kindly!