V8 Exhaust Manifold Bolts...

Just an Grade 5 bolt, some were stainless steel. Some were 3/8 x 16 x 1 5/8 inch others x 1 1/2 inch long. A plain 3/8 washer was used with the 1 5/8 long ones, a 3/8" shake proof washer with the 1 1/2 long bolts.

Grumpy AuC> Does anyone know if the original type are still available?

Someone told me once that the ones that appear to be stainless are actually nickel plated. either way they seem to hold up well.

I just replaced mine with regular stainless; theoretically not as strong as Grade 5 but they are working OK so far. If I snap one I'll have to look into some of the better grades of stainless.

nate

Chip

I substituted the originals a lot of year back but seem to remember that the originals were an "1/8" length while most commercial choices are to the 1/4"

I'm freshening up a 259/Flight-O-Matic out of a '60 Lark to transplant into the '55 Prez sedan and most of the manifold bolts were snapped. The engine internals seemed pretty good as it only had a total of 71K on the odometer.

I'm now in the process of re-assembling it in the Texas 100+ heat!

JT

(Who gives it about three or four hours a week tops!)

Transtar60 wrote:

I'm sure that I can get bolts locally but just wasn't sure on the size.

JT

Yeah, I believe that I used stainless bolts back in the 1980's when I refreshed the Avanti engine.

Normally, the original bolts hold up well (in my experience) but this episode was different...

JT

N8N wrote: