stevens03

Do exhaust manifolds have date codes? Where?

Nowhere Man

Yes they are on the back. When installed it's impossible to see

stevens03

If my engine is a may build june build for the car, what should the date codes be for the exhaust manifold & intake?

Nowhere Man

Everything should be close to the engine assembly date within a few days

JohnZ

The intake manifold casting date must be prior to the engine assembly date on the front pad, and must be within six months of the car's final assembly date for full judging credit; 2-6 weeks prior to the engine assembly date is more "typical" of production.

92GTA

With a small telescoping mirror, a flashlight, and someone who knows where to look, the date code can be seen

ricks327

Here is a picture of my exhaust manifolds with the date code E24 and E25 (May 24 & 25).
Rick

stevens03

thanks for all the imput

stevens03

where does it show the year?
are the date codes ever on the front?
00-00-00 format?
is it common that from manifold to manifold the casting numbers look different?

92GTA

They are in month/day format, example: F26, June 26th. The casting # on the manifold will determine the year. On my 1956 anyway.

My manifolds are only 1 day apart and the date castings look identical but I suppose it depends on the condition of the molds.