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Roasting your spark plugs - true or urban myth?

Posted: Thu Dec 20, 2007 7:41 am
by Orkney
Read somewhere the other day that it was better to put spark plugs in a really hot oven for a while rather than clean them.
Must say I'm a bit sceptical about this. Cant see that theres anything on a plug to dry out so whats it all about?
Anyone use this method?

Posted: Thu Dec 20, 2007 9:08 am
by paulhumphries
I think that it used to be a method used for oiled up plugs where if you tried to brush them off all it would do is move the gunge about.
Heating baked it so it became brittle and they could clean easier.
I know with two stroke motorbikes from my youth that an oiled up plug was best cleaned by heating on the domestic gas cooker hob :D
Although I haven't used one for many years the little 12v operated sand blasters did quite a good job of cleaning up plugs.

Slightly OT I also use the old trick of heating plugs and reinstalling them sometimes with older vehicles that are reluctant to start.
At one time, many years ago, I had a Hillman Imp and if I was away fom home I'd splash petrol into one of the hub caps and heat plugs in the fire - it worked :roll:


Paul Humphries

Posted: Thu Dec 20, 2007 12:22 pm
by bmcecosse
Hub cap fire! I like it - just petrol or did you mix it with some sand or earth ? I do know that wire brushing plugs is very bad for them - and a less 'domestic controversial' method is to heat the plugs with a wee gas blowtorch - soon burns off any oil/petrol residue.

Posted: Thu Dec 20, 2007 2:51 pm
by Orkney
Whilst the subject is going this way, wire brushing is/can be bad - always been 'learned' that it was OK with a brass wire brush.

Sidenote - recently heated some with a little propane torch to burn off the petrol i'd just washed them in (so as not to make the range oven stink) and the damned things ended up blacker than when they'd been wire brushed after dipping in petrol !

Posted: Thu Dec 20, 2007 3:17 pm
by Kevin
it was OK with a brass wire brush.
You are not alone I thought that was OK as well.

Posted: Thu Dec 20, 2007 7:31 pm
by Alec
Hello all,

when my wife's mower (2 stroke0 gives trouble I 'burn' the plugs with my Oxy\acetylene torch, works every time.

Alec.

Posted: Thu Dec 20, 2007 10:31 pm
by bmcecosse
" my wife's mower " I like it!! Kind of you to sort out the plugs (it's got more than one?) so she can get on with the grass!

Posted: Fri Dec 21, 2007 6:25 am
by Orkney
Why did G_d invent men ......
Because 'personal massaging devices' cant mow the lawn
as the ladies saying goes :o

Posted: Fri Dec 21, 2007 11:06 am
by Alec
Hello BMCE, Orkney,

I'm blessed with a wife that loves gardening, which includes lawns, my only involvement is fixing the tools.
(should have been plug, by the way)

Alec

Posted: Fri Dec 21, 2007 4:33 pm
by bmcecosse
Lucky you Alec! Though maybe you had a multi-cylinder ride-on lawn mower!
BTW Alec - That TR7 I got from Oswestry gave me sterling service all summer - never missed a beat - waltzed through it's MOT and it's now hiding in the garage until the sun comes back!

Posted: Fri Dec 21, 2007 8:51 pm
by dalebrignall
does cooking the spark plugs with the roast potatoes make the plugs taste funny

Posted: Fri Dec 21, 2007 8:53 pm
by dalebrignall
i have got a ride on tractor mower with a twin cylinder briggs and stratton engine and a 39 year old david brown who baught astin martin out that drives a 4 ft grass topper all of 43 hp

Posted: Sat Dec 22, 2007 12:39 pm
by RogerRust
Good old David brown and his brother JCBrown I wonder which made the more money.

Posted: Sat Dec 22, 2007 1:01 pm
by Orkney
Know which one i'd rather have a vintage/old model of from worth point of view :-)

Posted: Sat Dec 22, 2007 3:36 pm
by bmcecosse
JCB was Bamford - not Brown.

Posted: Sat Dec 22, 2007 4:40 pm
by paulhumphries
RogerRust wrote:Good old David brown and his brother JCBrown I wonder which made the more money.
JCB is a firm local to me.
They don't employ new people any more but use casual labour.
Of course qualified UK workers want more per hour than Eastern Europeans so guess where the bulk of the causal labour sent by agencies comes from ?
Lower labour costs means more profit and higher unemployment for locals as nobody is offered work there any more whether full time or casual via agencies.
One of my neighbours works for them and was employed years ago before they decided to use foreign workers.
He says language is contant problem as few speak English and you have to find the "leader" who does.
This year they announced record profits :evil:

Paul Humphries

Posted: Sat Dec 22, 2007 5:47 pm
by Kevin
Good old David brown and his brother JCBrown I wonder which made the more money.
Neither Charlie Brown made the most money :lol:

Posted: Sat Dec 22, 2007 7:21 pm
by alex_holden
Kevin wrote:
Good old David brown and his brother JCBrown I wonder which made the more money.
Neither Charlie Brown made the most money :lol:
I hear Gordon's doing pretty well for himself. :D

Posted: Sun Dec 23, 2007 1:46 pm
by dalebrignall
charlie brown flys spitfires from duxford

Posted: Sun Dec 23, 2007 2:02 pm
by Nadir
You're thinking of his dog - and it's a kennel, not a Spitfire