Please Help with Spark Plugs
Thread Starter
Member
Joined: Dec 2013
Posts: 110
Likes: 17
From: Boise ID
2014 E63 S, 2017 GLE 43, 2020 Cadilac Escalade, 2019 Lamborghini Performante
Please Help with Spark Plugs
I have a problem finding the right spark plug. I have cat less down pipes and race gas tune (105 octane) . new plugs that I put in OEM lasted for about 700 miles on race gas...they were gapped to the specs of weistec according to my shop.
took the car to the shop on Monday this week to get them done. However, last week Tuesday we ordered the Weistec plugs..they never sent them out...on Monday the shop owner called weistec they told him they will overnight them, again nothing..so we gave up on weistec cause I need my car for the track on Saturday. I looked all over the forums trying to find the right plug but no luck...the NKG that Renntech uses or used to use is no good ..it goes to deep into the engine and can become a glow plug and damage the engine...so I called NKG and they suggested some plugs but they don't fit.
So does anybody know a plug that will fit in the M157 motor that is one degree or 2 colder ?
Thank you for your help
took the car to the shop on Monday this week to get them done. However, last week Tuesday we ordered the Weistec plugs..they never sent them out...on Monday the shop owner called weistec they told him they will overnight them, again nothing..so we gave up on weistec cause I need my car for the track on Saturday. I looked all over the forums trying to find the right plug but no luck...the NKG that Renntech uses or used to use is no good ..it goes to deep into the engine and can become a glow plug and damage the engine...so I called NKG and they suggested some plugs but they don't fit.
So does anybody know a plug that will fit in the M157 motor that is one degree or 2 colder ?
Thank you for your help
Thread Starter
Member
Joined: Dec 2013
Posts: 110
Likes: 17
From: Boise ID
2014 E63 S, 2017 GLE 43, 2020 Cadilac Escalade, 2019 Lamborghini Performante
All the posts I could find were the weistec renntec or the nkg's but the nkg's don't work I ordered 3 sets pretty much and they can't put them in 
and the Renntech NKG's are just too long and can damage the engine that's why renntech stopped selling them..
and the Renntech NKG's are just too long and can damage the engine that's why renntech stopped selling them..
Senior Member
Joined: Feb 2009
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From: Vancouver, Canada
2016 CLS550 4Matic
I'm fairly sure that all the tuner's now recommend OEM plugs gapped tighter since MB switched to colder more suitable plugs at some point recently anyway which was what the tuners were recommending before.
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Joined: Jun 2006
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'03 E55, Range Rover Sport Supercharged, Ducati 748R
Super Member
Joined: Sep 2011
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From: Russia
GTR
that’s right nothing can be better now than oem plugs unless u go with c16 fuel .
