thickness gauge

[japimport]

i bought a thickness gauge today to set my spark plugs along with a haynes manual it sats to set the gap at 1.0mm how do i set it on the feeler gauge it doesnt have 1.0mm on it

 

[Howard]

Add the feelers together until they total 1mm

Eg. if you have a 0.2 , 0.3 and 0.5 , that totals 1mm , slide all three into the gap.

 

[japimport]

thanks very much

 

[Will]

That's quite a common question with feeler gauges - even caught me out when I first used them! (gapping plugs for a motorbike at the time )

Perhaps it's because there's so many different thicknesses - you could be forgiven for thinking that they didn't have the size you needed etc.

Will

 

[japimport]

ok ive checked the gauge i have .008 and .002 if i put them together thatll be 1.0mm

 

[Howard]

No , that will be 0.010 ( i think )

 

[BTB 500]

ok ive checked the gauge i have .008 and .002 if i put them together thatll be 1.0mm

0.008 plus 0.002 is 0.01.

Are you sure your gauges are metric and not thousandths of an inch (thou)?

 

[japimport]

ok this is whats on the feelers .002 .003 .004 .0015.006.025 .008.010.012.015 what will i put together to get the 1.0mm im a bit embarresed i cant work it out thanks for your help

 

[Howard]

I think Bills right. The gauges are not metric , they are in thousanths of an inch.

From wiki answers ..

http://wiki.answers.com/Q/How_many_thousands_of_an_inch_is_1_mm

So 39 thou is 1 mm .... so add the .015 , .012 , .010 and the .002 and that should give you 1mm ( 39 thou )

 

[kth286]

If you buy new plugs from Merc they come already set to correct gap.

After 18000 miles (or whatever your timescale is) just throw them away and buy another set.

There should be no need to gap plugs anymore.

The plugs for mine are like 2 pounds each !!!!!!!!!!!!!!!!!!

 

[Will]

If you buy new plugs from Merc they come already set to correct gap.

After 18000 miles (or whatever your timescale is) just throw them away and buy another set.

There should be no need to gap plugs anymore.

The plugs for mine are like 2 pounds each !!!!!!!!!!!!!!!!!!

Agreed on all points - but it doesn't hurt to check

Occasionally plugs are out of spec - rare I grant you.

No one use their fingernail anymore to gap plugs then?

Will

 

[Deleted member 6183]

Agreed on all points - but it doesn't hurt to check

Occasionally plugs are out of spec - rare I grant you.

No one use their fingernail anymore to gap plugs then?

Will

Right!

And still do the timing by ear and twisting the dizzy, check engine condition with a stethoscope to the block.

 

[Dieselman]

Right!

And still do the timing by ear and twisting the dizzy, check engine condition with a stethoscope to the block.

Errr....yes...

 

[Will]

check engine condition with a stethoscope to the block.

Stethoscope...pah!

You mean an old, long-handled screwdriver or a broom handle

Will

 

[Deleted member 6183]

Ah, the good old days!

 

[Deleted member 6183]

one of my cars responds well to a bit of old fashioned tinkering. no prizes for guessing which one.