Interesting..torque specs weren't up front in the head specs...
Thanks, I stand corrected. I will no go out and torque the plugs in the
Tiger to 17.5 ft-lbs...is that with or without lube?
Worlds Fastest Sunbeam, period.
204.913 mph flying mile
210.779 mph exit speed
On 4/18/2012 5:32 PM, Ron Fraser wrote:
> Spark plug torque
> Tapered plug - snug + 1/8 turn
> Washer style - snug + 1/4 turn
> This seems to be the norm for spark plugs.
> Tiger Shop Manual - Section B - Page 70 - torque = 15 - 20 ft lbs
> Ron Fraser
> -----Original Message-----
> From: firstname.lastname@example.org [mailto:email@example.com]
> On Behalf Of Larry Mayfield
> Sent: Wednesday, April 18, 2012 6:18 PM
> To: Jay Laifman
> Cc: Tiger's Den
> Subject: Re: [Tigers] Anti-Seize on Spark Plugs
> Intersting...but, I am throwing the BS flag on this one. When the plug
> was fires, in this case, and the spark arcs under the boot to the metal
> case, it is done. The case with its tapered seat grounds the spark to
> the head and no further current flows. The engineer mentions that the
> spark runs down the case to the inside of the spark where the center
> electrode is housed in ceramic and sparks inside there. I don't think
> so. Again, in a normally firing plug, the current flows down the center
> of the plug, jumps the gap and grounds itself on the side of the plug
> case. That side is grounded both by the threads and the plug seat. As
> to the anti seize, yeah too much is a bad thing. But it must also be
> noted that the common variety anti sieze compounds use some sort of
> metallic powder in them. I have two different kinds, one with small
> copper microballs and one with a nickel alloy for higher heat
> applications. The metals in the anti seize are conductive in
> themselves so having them between the threads and head material is a
> non issue. getting the goo on the electrode is a problem though and you
> should avoid that. Also, getting it on the exterior plug ceramic is a
> no no as well. Why? well because it IS conductive stuff. so if you have
> a db on the ceramic the spark energy will take the easiest path to
> ground and that isn't through the center electrode. Anybody remember
> what the plug torque is for their spark plugs in their Tigers? I don't
> see it in the repair manual. I didn't get a torque spec with the
> aluminum heads for the race car either. Most say something like hand
> tight plus a bit extra with the wrench. As to putting the dielectric
> grease inside the boot. Oh yes! It makes those suckers really easy to
> get all the way on. And that makes good electrical contact with the
> center electrode. It doesn't seem to help me get the boot off though.
> Just use a dab of ante seize. like a bit on a q tip. Or use milk of
> magnesia, works just as well and is non conductive.
> happy sparking
> Worlds Fastest Sunbeam, period.
> 204.913 mph flying mile
> 210.779 mph exit speed
> On 4/18/2012 12:51 PM, Jay Laifman wrote:
>> Every car guy should watch this!
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