Metric history
Thread Starter
Advanced
Joined: Nov 2020
Posts: 78
Likes: 9
From: near Indy
Metric history
Out of curiousity wondering at what generation/year the metric system was applied to the Corvette. I'm thinking it was the C4. I'm changing axle universals and most videos call for a 5/16" socket for C4 retainer strap bolts, my '93 has 8mm, 5/16" socket slips, surprised the video guys could use them.
Burning Brakes
Joined: Mar 2010
Posts: 1,094
Likes: 68
From: Providence RI
I know that some of the earlier c4s had SAE bolt heads with metric threads. This holds true for my 1991
I’m sure this if the above comment is mistaken I’ll quickly be hung by the forum self proclaimed gurus for posting a mistake on the internet.
I’m sure this if the above comment is mistaken I’ll quickly be hung by the forum self proclaimed gurus for posting a mistake on the internet.
Last edited by Deepa; Jul 13, 2021 at 12:44 PM.
Le Mans Master
Joined: Sep 2004
Posts: 6,019
Likes: 568
From: Conroe Texas
my 1972 lt-1 c3 is all standard bolts. i took apart a 1978 c3 years ago and it had both standard and metric bolts. if i remember right, the engine/transmission/diff was standard and body bolts were metric.
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
Metric fasteners crept in during the late 70's. Mostly on the body and newly designed assemblies. The C4 is nearly all metric although the SBC never went fully metric. Standard and metric are units of measure it's unavoidable the there will be distances that will be extremely close so sockets will interchange. GM did adopt the 10, 13,15, 18 to force DIYers to buy extra tools. I has seen old tool sets where sockets and wrenches were graduated in 32's matching nearly all metric sizes.
