Drivetrain Spark plugs and pulleys go like peanut butter and jelly???

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Apr 13, 2006 | 08:08 AM

#26

obehave

6th Gear

Joined: Sep 2002

Posts: 2,196

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From: Hampton, VA

Quote:

Originally Posted by -Jonathan-

Hey guys, real quick....I asked this a few posts up:

"Oh and one more question about the oil film accumlating in the engine. Aren't there cleaning oils specifically designed to eat that stuff away once in a while? If so, that may be the safer answer, instead of risking an engine explode due to a cramped cable. Sometimes you don't know if those cables cramp, because they look fine when the bonnet's open, but when you close the bonnet, they may cramp badly!"

If someone could maybe answer that, I'd appreciate it. Then you all can return to your spark plug talk.

Thanks!!

Modern engine oils do contain detergents. and yes they do help.
But will they clean out oil contaminant deposits? Particularly in the intake track? Not really.

Apr 13, 2006 | 09:01 AM

#27

dominicminicoopers

6th Gear

Joined: Oct 2002

Posts: 4,831

Likes: 1

From: Phoenix, AZ

Quote:

Originally Posted by latte hiatus

But I still don't quite comprehend how colder plugs could potentially cause more damage to the engine than stock plugs

Me neither.

Quote:

Originally Posted by latte hiatus

After all, isn't detonation caused when the fuel mixture is ignited somewhere in the combustion chamber,

Colder plugs will help remove the heat from the plug itself. Be removing heat from the plug, you have less chance of a "hot spot" on the plug that remains hot enough to light the fuel in the chamber before the spark plug fires. However when you remove too much heat from the spark plug (by going to a too cold of a plug) you can actually not get a spark to jump the gap causing a misfire and then the unburnt fuel can accumulate on the plug surface causing a fouled plug that wont fire at all.

Quote:

Originally Posted by latte hiatus

but that also goes against Eric's finding that detonation occurs at the same rate regardless of the heat range of the plugs.

Eric only checked one heat range of plugs colder than stock. And only checked one manufacture of plug. And only checked one plug metal type, that being "iridium". This certainly, as I'm sure Eric would agree, was not a comprehensive test. Just some initial findings that need more data points in order to make an complete assessment of the situation.

Apr 13, 2006 | 10:53 AM

#28

Helix13mini

Former Vendor

Joined: Aug 2002

Posts: 3,159

Likes: 17

From: Under your car

Quote:

Originally Posted by rl48mini

I don't know if this will help or not...

I think Eric is proposing to create a known "weak link" in the ignition system. In that respect, the stock plug will fail (assuming one of the above mentioned senarios occurs, ie, bad gas, bad knock sensor, whatever) before any (much more) serious engine damage might occur. It's not that it WILL occur it's just that it might. This way, the plug failure will prevent the other more expensive problems...

Bingo.

Quote:

Originally Posted by dominicminicoopers

and Bingo.

Apr 13, 2006 | 04:24 PM

#29

orthomini

3rd Gear

Joined: Nov 2003

Posts: 239

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From: bham,al.

after i had to replace a bad injector my local bmw mech. also replaced my denso ik22's with stock plugs.( i have a 15% pulley,magnaflow,obx headers, and alta cai) after, on fairly hard acceleration' i kept hearing a slight pop like a quiet decel burble. so, i changed plugs to a set of NGK iridium's one heat range colder than stock. have not heard the pop since.

Apr 13, 2006 | 04:38 PM

#30

J0kER

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Joined: Oct 2003

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From: EastSide .: =0)

Quote:

Originally Posted by orthomini

why wuz a new injector needed? or how did u noe to replace it..
did u see tha ik22's after they were removed, if so how did they look?

Apr 13, 2006 | 04:46 PM

#31

orthomini

3rd Gear

Joined: Nov 2003

Posts: 239

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From: bham,al.

the codes indicated a bad #1 injector and the mech. found it stuck closed and was able to unstick it. i replaced it a week or so later. i think my mech. would agree with Eric and prefers the stock plugs. i did tell him what i did to alleviate the popping and he wasnt sure that was a definitve fix but so far it seems to work.

Apr 13, 2006 | 05:10 PM

#32

J0kER

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From: EastSide .: =0)

yea those ik22s have had a bit of a bad run w/all tha vw D00Ds i hang out w/ they say they werk fer a while but not a real long lastin' set of plugs over all