Valve not seating

[70burntorangeT/A]

So after 4 years of sitting and only being started 3 or 4 times a year ive finally gotten my challenger back on the road. I had the transmission and carb rebuilt, and had new plugs and wires installed. The mechanic told me that I had a valve that was not seating correctly. Is there any way to check this without pulling the head?

[cudabob496]

Measure cylinder pressures.

[70burntorangeT/A]

Also the car starts within a second when the engine is cold, but after it warms up to operating temperature it seems to take forever to get the engine started. I forgot to mention in my above post that the car also has a new coil and dist cap. Carb is a holley with an electronic choke.

[70burntorangeT/A]

I'm assuming that if the valves are in the closed position, and one of them is not seated, that it will not build pressure or the pressure will drop rapidly?

[dodj]

I'm assuming that if the valves are in the closed position, and one of them is not seated, that it will not build pressure or the pressure will drop rapidly?

I was helping a friend build a 396 a couple years ago, and when a piece of grit prevented a valve from seating properly, virtually no pressure built up in that cylinder during compression testing.

[70burntorangeT/A]

Alright thanks for the information. The more i drive the car, the better it seems to run. Hopefully the valve is just sticking due to not being run.

[cudabob496]

for starting troubles, make sure timing is correct. Initial around 10 degrees BTDC maybe.

[cudabob496]

check float levels once car is warmed up. Might need new needle and seat assemblies.
Maybe put in some fuel system cleaner, and hit carb with some carb cleaner.