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I wanna say 13mm…I'm trying to ground a couple wires I ran does anyone know the bolt size that's on the engine block I have a 305
"The" bolt size???I'm trying to ground a couple wires I ran does anyone know the bolt size that's on the engine block I have a 305
I could’ve sworn the frame to head bolt was 13mm when I just replaced that ground strap.You must be registered for see images attach
The nut in the picture is to the head. That’s the nut I removed to replace the old ground strap and you can see the new strap on it.13mm would be the tool used to remove the nut, the bellhousung bolt/stud in the pic is a 3/8x16 thread.
Bolts and nuts are listed by thread size...
That could be. It looks like you have a stud screwing into the head and then, the ground bolts to it. The threaded part that goes into the head is 3/8" NC while the stud sticking out is Metric. GM did this on just about all of their accessory studs. Think about it, that head, if it were used on the driver's side would be bolted up to the accessory bracket in front. All of those are 3/8" NC.I could’ve sworn the frame to head bolt was 13mm when I just replaced that ground strap.