Imperial v Metric

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Imperial on some brake fittings, battery connections, and muffler clamps. Metric on the rest.
 
Yes!

Most everything is metric now, but we have the occasional vehicle with SAE fasteners. Sometimes you find both on the same vehicle.
 
Back in the 70s Volvo was sending knocked down "kits" to Canada for assembly. They contained a lot of SAE fasteners in areas which would be subject to regular attention in the States but there were a fair amount of metric nuts and bolts in other areas.
 
All depends on the make model and year. Some have all SAE, some have all metric, and some are a mix. You need 2 sets of sockets and wrenches to work on cars here.
 
Not much is SAE/Imperial these days. I pulled the engine out of a boat last year it was a 1987 OMC Cobra (3.0L GM). It was fun to dust off the 5/8 and 1/2 inch sockets and wrenches. Brought back childhood memories for me...
 
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Usually if it is an import it is near 100% metric. Depending on the age of a domestic vehicle the percentage of metric or imperial will vary.
 
Just about bought a set of combo sockets to cover both today. Just don't think there is enough beef in them to get the job done if something is really stuck. Trying to get tools set for travel and try stay light
 
My Subaru is all metric. So is my '03 Olds Alero. At least I think it is. I only use metric wrenches on it.

GM had several years where their cars were what you may consider a hybrid. I have another word for it, but the censor software would cut it out for me. Let's just say it's akin to an aggressive file. Anyway, you had to have both metric and imperial. It was awful! I guess it still is if you own one of these cars.
 
The MG is essentially all SAE with the odd BSW/BSF fastener thrown in. When I find a metric thread, it's most likely because someone who worked on the car in the past put it there. There are a few other oddballs in there, such as British Standard Brass on the carburetor jets. Most of the hydraulics are British pipe, and the heads are generally either a Whitworth or SAE size. Interestingly enough, many folks will use a 7/16" SAE wrench on the distributor clamp, and often end up with the clamp either not tight enough or too tight. I've sold people on the value of having a set of Whitworth wrenches when I hand them a 3/16" Whitworth wrench and they see that it fits this bolt perfectly. The nut being tightened is technically 1/4" BSF, but the head is the same size as 3/16" BSW.

Interestingly enough, the XPAG and XPEG series MG engines were built machinery imported from France. Virtually all of the engine screws are metric, but have a BSW head. The official reason given at the time was that the mechanics would have to buy all new tools if they kept the metric heads, but one of the finest British mechanics in the US is fond of saying that the real reason was "We're British and we'll be gosh durned if the French are going to tell us what to do."

The fasteners on my Lincoln are overwhelmingly metric, although there are some SAE ones thrown in there. Interestingly enough, as an example, the bolts holding the COPs in place are SAE but they are accessed by removing covers that are each held down with 6 metric head bolts
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. I currently tend to three other American cars-two other Lincolns and a Buick-and the fasteners on them are overwhelmingly metric also. I'm not sure if I've found an SAE fastener on the Buick. Interestingly enough, I changed the oil in my dad's MKS a few weeks ago, and the the splash guard bolts were all SAE. Of course, Torx is also common these days.

I've also been looking after a '97 Geo Prizm more recently, which needless to say is all metric considering that it's a Toyota. I think the only GM part on that car might be the steering wheel logo-it's lived a hard life and doesn't even have the grille badge anymore
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. I'm trying to keep it going at least until my friend who owns it finishes her PhD in May-she knows the writing is on the wall.
 
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Originally Posted By: jeepman3071
The one thing I hate about my Jeep. It has imperial, metric, and torx. I HATE torx.

yep, my car has lots of Torx in it, very annoying.
 
Can't say I've had to use any imperial or Torx on my Jeep yet. Her Volvo has many Torx bolts.

I do remember the XJ having 1 Torx and one metric bolt holding a sensor on. Torx bolts just make factory assembly easier.
 
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