Does anyone know the bolt size ......
Discussion
mrzigazaga said:
Hi mate
I think this is it...
Overrun valve Bolt 5/16" UNC x 2.1/4 inches long
Cheers
Ziga
All, no sure that's right? The over run valve on mine has quite short bolts (set screws) as they only just go through the plenum wall. 2.5" would take the bolt all the way into the plenum. If I get a minute tonight I'll try and measure them. I think this is it...
Overrun valve Bolt 5/16" UNC x 2.1/4 inches long
Cheers
Ziga
you'll obviously know the length from the existing bolt.
Diameter can be measured easy enough
Thread is unlikely to be metric as these engines are of American origin so that leaves unf or unc. threads into alluminium are usually unc.
It's fiddly but thread pitch can be counted (if you don't have a thread gauge), unc will be 18tpi whereas unf is 24, a very distinguishable difference.
KKson said:
mrzigazaga said:
Hi mate
I think this is it...
Overrun valve Bolt 5/16" UNC x 2.1/4 inches long
Cheers
Ziga
All, no sure that's right? The over run valve on mine has quite short bolts (set screws) as they only just go through the plenum wall. 2.5" would take the bolt all the way into the plenum. If I get a minute tonight I'll try and measure them. I think this is it...
Overrun valve Bolt 5/16" UNC x 2.1/4 inches long
Cheers
Ziga
phillpot said:
you'll obviously know the length from the existing bolt.
Diameter can be measured easy enough
Thread is unlikely to be metric as these engines are of American origin so that leaves unf or unc. threads into alluminium are usually unc.
It's fiddly but thread pitch can be counted (if you don't have a thread gauge), unc will be 18tpi whereas unf is 24, a very distinguishable difference.
I am away from the car ATM and wanted to order some in ahead of my return. I was going to pinch one of them but forget.Diameter can be measured easy enough
Thread is unlikely to be metric as these engines are of American origin so that leaves unf or unc. threads into alluminium are usually unc.
It's fiddly but thread pitch can be counted (if you don't have a thread gauge), unc will be 18tpi whereas unf is 24, a very distinguishable difference.
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