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View Full Version : A little question about the 3400 engine

Alon Alero
07-24-2007, 12:39 PM
I would just like to know how many valves exist in the 3400 engine?


Thanx.
AGT
07-24-2007, 01:14 PM
2 per cyclinder (overhead)
Alon Alero
07-24-2007, 01:19 PM
overhead? what do u mean?

so the 3400 engine has 12V ?
AGT
07-24-2007, 01:27 PM
OHV Overhead Valve

According to GM...yes
brim
08-02-2007, 09:56 PM
OHV Overhead Valve

According to GM...yes

yeah but who knows! we might have 44 valves!
DOHC_tuner
08-02-2007, 11:04 PM
that sucks so just one for intake and just one for exhaust
mfuller
08-02-2007, 11:21 PM
Yep. Intake valves are 1.76" in diameter and exhaust valves are 1.42".
Why does it suck?
rowdygls
08-03-2007, 09:43 AM
Yep. Intake valves are 1.76" in diameter and exhaust valves are 1.42".
Why does it suck?

I have a feeling most on here don't realize the Viper is an OHV engine (or it used to be).
IRONDOG442
08-03-2007, 11:19 AM
virtually every engine designed since 1949 is over head valve...

Ever hear of the Rocket V-8 ???

the first overhead valve engine released in 1949
Cliff8928
08-03-2007, 12:36 PM
I have a feeling most on here don't realize the Viper is an OHV engine (or it used to be).

The dodge V10 is still an OHV engine, but who'd want one of those anyways... :icon_rolleyes:

The Z06 and ALL corvettes except for the ZR-1 for that matter are all OHV engines.
Kilroy
08-03-2007, 03:48 PM
Here is an example of an OHV engine:

http://static.howstuffworks.com/gif/hemi-diagram.gif

Note the valve are OVER the piston.

Here is an example of a NON-OHV engine:

http://static.howstuffworks.com/gif/hemi-flathead.gif

Note the valves are NOT over the piston.

Cleared things up??
DOHC_tuner
08-03-2007, 06:20 PM
Hence the name "Dual Over Head Cam" DOHC, for us twin cam folk
Spilner521
08-03-2007, 08:34 PM
Hence the name "Dual Over Head Cam" DOHC, for us twin cam folk
Sort of but not really. Not all OHV engines are DOHC. OHV engines have 1 cam in the engine block that pushes open the valves via pushrods. OHC (over head cam) engines have the cam(s) in the head pushing down on the valves directly, without pushrods.
Kilroy
08-03-2007, 09:18 PM
Overhead cams, and overhead valves are two different things. With overhead valves, the camshaft is lower in the engine and uses pushrods and rocker arms to activate the valves. With overhead cams, the camshat is above the valves, and activates teh valves directly.
Redog
08-04-2007, 12:06 AM
MFuller thanks for that info. I never knew the valve size, or thought to ask

I don't understand why 2 valves per cyl sucks. Mine does just fine with 2
rustyballs_69
08-04-2007, 12:14 AM
MFuller thanks for that info. I never knew the valve size, or thought to ask

I don't understand why 2 valves per cyl sucks. Mine does just fine with 2

Because the 4 bangers got 4 valves per cyl, doesn't mean it sucks though, just means we got 2 big valves and they got 4 small ones.