Chevy cyl numbering

TomC750

TomC750

Senior Member
Odd question to ask on the Ford Barn forum, but here goes. I had some machining done on my 8NV8 tractor engine. The shop took the valves out in the process. The owner thinks their employee did not understand the flathead numbering system and numbered the valves (nicely packaged up) and numbered like a small block Chev. So what is that numbering system?

I will install a few according to that and check clearances, then put the rest in and check again.
 
TomC750 said:
Odd question to ask on the Ford Barn forum, but here goes. I had some machining done on my 8NV8 tractor engine. The shop took the valves out in the process. The owner thinks their employee did not understand the flathead numbering system and numbered the valves (nicely packaged up) and numbered like a small block Chev. So what is that numbering system?

I will install a few according to that and check clearances, then put the rest in and check again.
Click to expand...


WOW! I REALLY SCREWED THIS UP! HAHA. Not only is my memory fading!! I have not worked on a GM engine in many moons.

Thanx duece_roadster for the correction!
 
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Flathead Right bank front to rear 1 2 3 4
Chev Right bank front to rear 2 4 6 8

Flathead Left bank front to rear 5 6 7 8
Chev Left bank front to rear 1 3 5 7

This should help you get the valves back into their original spots, renumber the bags.
18436572 is the Chev firing order
Also, as far as I know a Flathead is the only V8 that #1 is not on the bank that is farthest forward.


Don't know why my post the numbers don't line up.
 
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deuce_roadster said:
Flathead Right bank front to rear 1 2 3 4
Chev Right bank front to rear 2 4 6 8

Flathead Left bank front to rear 5 6 7 8
Chev Left bank front to rear 1 3 5 7

This should help you get the valves back into their original spots, renumber the bags.
18436572 is the Chev firing order
Also, as far as I know a Flathead is the only V8 that #1 is not on the bank that is farthest forward.


Don't know why my post the numbers don't line up.
Click to expand...
Thanks deuce. I know the flathead, and I can quote the firing order in my sleep! And good idea on renumbering the bags. Now I just have to find a bar to reinstall the keepers.
 
“……#1 is not on the bank that is farthest forward.” Its in the front of the right bank.???
 
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