It's time to replace the spark plugs on my '98 5.0L Expy. Right next to #5 I notice this empty hole - an exhaust manifold bolt somehow worked itself loose and disappeared. Not a big deal... But a 10mmx1.5 wouldn't fit, and
8mm is way too small. Totally baffled, I try a 3/8"x16 standard -- and it fits!!! Yes, I know that the 5.0L V8 engine has a long history, but an imperial thread on a '98 engine? Am I dreaming? Please, guys, save my sanity, quick.
I agree. At least in the olden days, if it was American it used English, if it was foreign, it used metric, except if it was British it used Whitworth... ;-))
But once you get used to it, the metric system makes a lot more sense for everything.
-Paul
Not just plugs, but all sorts of different fasteners. And not confined to Ford. I ended up with a set of metric taps and dies in addition to the standard set. It turns out the handiest items in those sets are the thread pitch gauges. It is funny how often you are trying to find a matching nut or bolt for some application and the first three tries don't fit.
Charlie
Thanks for the comments. Guess I am lucky that this antique, iron-head pushrod engine uses any common fasteners at all; might have been the 18th century made-to-fit ones... Anyone know when was the 302 V8 introduced? Sometime in the early 60's? Even with multiport fuel injection it's a gas guzzler, but a rock-solid one. At almost 100K miles as smooth and powerful as it was when brand new.
Most engine fasterners are still US thread while chassis/body fasteners are metric. I think it's still that way today on many US models.
1968, I believe.
Dave
The 25 year old 3.8L on my mid-size LTD has all metric threads. Not to mention the 4.6L on the Grand Marquis (which also has the 'metric' 4R70W transmission). My guess would be that anything designed after the oil crisis of the late
70's was metric, but they never changed the threads on existing designs, even through major updates, as long as those stayed in production.1962
go to
did i understand the article to say 302 (5.0) used until 1995?
my 2000 Explorer has this engine.
1962go to
Seems that they kept making them until replacement by the 4.6L 'modular' in the restyled 2002 Explorer. The article also tells that the displacement did not become 302 until 1968. Guess what it loses on one end, it gains on the other. Overall, 34 years of service is a very respectable accomplishment, any way you look at it.
The article also tells that the displacement did
1968 was the last year for the 289 and also the first year for the 302. I'm not sure if they were both available at the same time, or if the 302 was a mid year change.Dave
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