help using feeler gauge

[dan22leeds]

i need to reduce a plug gap to 0.80mm
none of the blades on my feeler gauge have specfic measurement on them

each blade has two numbers onit i assume the top number is metric

the blades i plan use to make 0.80mm look like this

022
559
mm

028
711
mm

030
762
mm

if the top numbers are metric then is that the correct measurement

i tried to convert 0.80mm on google an the figure it gave didnt add up to the lower number on the gauges

[lee303]

.8 mm is 31 and a half thou, on your figures the second number will be the metric figure, i would imagine the imperial measurement would be printed as 032 for 32 thou

[Andy K]

or get one of these simple ones

CHAMPION SPARK PLUG GAP TOOL/GAUGE METRIC AND IMPERIAL MADE IN USA (DADS XMAS?) | eBay

Portable Gap Spark Plug Gauge - Key ring - BRAND NEW | eBay

[lee303]

a touch extreme when he has the feeler gauges there perhaps, but a nice tool for adjusting too i guess

[dan22leeds]

i wanted the above gauge but needed it in a hurry could only find feeler gauges in the shops

the highest number on my feeler gauges is 30 an the lowest in 0.05 so i cant make 32

[Paul]

Mine just show metric

[*BenH*]

i wanted the above gauge but needed it in a hurry could only find feeler gauges in the shops

the highest number on my feeler gauges is 30 an the lowest in 0.05 so i cant make 32

Just use more than one, stacked up to give the correct amount.

[Paul]

Yeh, if your trying to find the exact number you maybe out of luck.

[lee303]

yeah, just use a 015 and an 017 to make 32 thou, or tbh, use the 030 and live with a spark plug gap that is 2 thou/.05mm too small, half a tenth of a mm really won’t affect anything

[Paul]

He's already changing the gap from 1.1mm to .8mm as a bit of an experiment on a Daewoo engine, so see how you get on.