Could runningthewrong plugs causemy motor to run hot ? I discovered today that I have BP6ES plugs , is this a hotter range? Is this a likely reason why my engines been running a bit hot? Arent A engines meant to run BP5ES?

BP6ES is a colder plug, but not much colder. I don't see any reason why this would make your engine run hotter. It may foul easier, but the difference is little that i doubt it.

I ran BP6ES because at the time I was buying there was no 5's on the shelf and it was fine

THANKS, might check my temp guage up against a thermometer, these cars are really starting to get old . AND FAST 222222222

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OLD? Whadayamean OLD? Our Datsuns are just geting to be "mature" Pre 1930 could be regarded as old, but 1960's & up are just out of warranty.

I used BP6ES plugs, or the NGK platinum equivalant, for many many years in my GX engine. They were just right.

SORRY, Dodgeman. What I meant by that remark, was old considering the materials from which they are made . (When compared to the more substantial materials
that the likes of mopar use) I certainly never meant to ruffle your feathers . Besides EVERYTHING wears out eventually.

A14force
Don't wory about ruffling my feathers, you'l need to do better than that.
We all have our own perspective on what constitutes "old." When i was a kid, my father was one of the founder members of the Veteran Car Club of Australia in 1952, & we had pre 1910 cars around. These things became the benchmark for "old" for me, but i guess anything that is older than we are is normally regarded as old by most people, but like a few of us, i remember our Datsuns when they were new.
I guess that makes ME old.
No offence taken at all.

I prefer older stuff myself, Im game for most things but new stuff is too complex and dear for an old school fool like me. I was weaned on Mopars by my dad.

Your Dad is obviously an exceptional man, & you're a lucky son.

Ill be sure to send him your regards

PS what year/model is your dodge?