Just bought the van with around 99K miles on it. Spark plugs 2-6 were
just hanging in there, loose as can be. Champion plugs. 2 were
absolute bastards to get out, as there was hardened combustion
byproducts between the threads and taper of the spark plugs. Could
this simply have been some idiot refusing to take the doghouse off and
changing them from the hood? Also, does anyone have a spark plug
recommendation for this setup? Thanks.
Indeed an idiot if he used Champions.
Now you have extra work.. have to clean the chamfer and blow it out.
The exact callout for the Motorcraft or AutoLite plugs.. no gimmicks, no
double-plats... NO BOSCH!
Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!
Bosch plugs ran for crap in my '89 Probe (even if it was really a Mazda),
but ran good (but not as good as Autolite) in my '00 Eclipse 4-banger. NGK
plugs worked very well in the Probe. But of all the different vehicles I've
owned and all the plugs I've changed since my '55 Chevy I had in 1963, I
think I've had the best all-around results with Autolite. I wouldn't put
Champion's in my weed-eater.
It's common for Bosch plugs to cause misfires and odd driveability problems in
(many?) Ford engines. I've personally seen it on the 4.6 and 5.0. It's common
that, for driveability concerns, I always ask if the customer has insatlled
plugs in the vehicle. Strange, but Ford motors don't like them.
FWIW, Bosch glow plugs last about a week in Ford Diesel engines.
I agree that it's strange but I've never heard of any explanation for
why Bosch plugs don't work well in Ford engines. I also wonder when this
problem began. Does it apply to all Ford engines of any year?
I've never heard why either. They work for some folks, they don't work for
They work well in some motors, poorly in others. I just don't use Bosch plugs in
Ford, then I don't have to worry about it.
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