Measure your spark plug gap to obtain its exact dimensions with this solid steel, SCA Spark Plug Gauge Coin measurement tool. This little coin will size up gaps between 0.60mm to 2.4mm (back) and 0.02 inches to 0.10 inches (front) to give you the exact measurements needed to find the right sized new spark plug to replace a worn-out or damaged original piece.
Those were different days. Today we have Google in our pockets but can we perform an emergency gapping of a spark plug?
Since EFI, we don't need to adjust plug gaps or timing.
But it is sad how many people cannot change their own oil. Or flat tyre even!
Parents buy their kids RAC membership instead of teaching them basic skills.
Proper gaps are still required for EFI.
@bargaino: I've never heard that. Why would they need adjusting after they're installed? Unless you bumped them during cleaning or similar there is no such need.
I think many new plugs use materials that are high temp but brittle and therefore are preset and not suitable for adjusting.
(But it's been a while since I've been down this road so maybe I'm pulling things out of my own "cylinder.")
@afoveht: In case anyone is interested…
You needed to regap plugs because they eroded and gaps would go from 32 thou (.8mm) to 40+ in only ~10,000ks with points & condenser ignition Kettering ignition
This made a fair difference to engine running. Also the points would wear (contacts got eroded /burnt and the rubbing block got worn down) which would change the ignition timing. There were quite a few things that could go wrong.
The change to electronic spark control (electronic ignition) made the biggest difference to plug life. The change to electronic triggering (no points) meant the ignition timing wouldn't keep changing when the points got worn. There have been lots of versions and varieties over time.
Platinum and Iridium plugs basically double the plug life all else being equal. You can still adjust the gap on them as you only move/bend the outer electrode on any plugs.
In short: if you need this tool you really should get a newer car;
Despite what it looks like that's pretty much factory cost!
You must be joking! Spark plugs themselves are less than 60c ex-factory from China these days.
You might pay 60c on Alibaba for these, but I'm sure SCA can do better.
I figured it'd be more manual labour cost to verify the accuracy/stamping, not raw material cost :) Then again… they might not check!
These are terrible quality and measurements aren’t correct. Good for a key ring only
just be mindful these are not suitable for high end spark plugs like Iradium etc, only suitable for copper or cheaper.
I'm using denso twin tip iridium plugs and would not use this to gap them. Proper feeler gauge does a much better job for example https://www.supercheapauto.com.au/p/toolpro-toolpro-feeler-g…
Holy shit. My dad carried one of these on his keyring when I was a kid. Such a wave of nostalgia!