77 el Camino Fuel tank bolts that hold it up?
Anyone know exact size of bolt that holds up the tank . Lost the bolts in the move. And wanna get the exact same size .
- M.Lv 73 weeks agoFavorite Answer
That's so old, I barely remember.
It's a 3/8-16, full thread bolt, perhaps 3 inches long. Use a flat washer under the bolt head. Use a strip of thick (30#) roofing tarpaper between the strap and the steel tank.
p.s. I dug out my old GM parts book (due to a comment) which covers 1962-1975. I am posting the page which covers "Group 3.023" which is the gas tank strap bolt. I would guess that a 1977 is the same as a 1975, but the listing is unclear.
All the bolts that I remember are what I mentioned above, which is part #409999 (hex head bolt and a tinnerman nut in the trunk floor) or there were many with a carriage bolt and a nut which was part #3913468. But in the mid 1970s there were threaded rods with a curved end, they are calling it a hook type.
Yahoo Answers is not letting me post a photo today. It has been acting up all week.
The hex head bolt or the carriage bolt listed are both ⅜"-16 × 3⅜" long.
p.s. #2. My book says 1974-75 all models, ⅜"-16 × 1.7" long. It seems to be a hook, not a bolt.
You need to look on the ends of a gas tank strap. What does it look like?
Losing old parts causes problems.
-Engine overhaul mechanic and general automotive mechanic since 1972
- RonLv 73 weeks ago
Why would you need the exact same size?