A very thorough visual inspection, or take it to a machine shop for testing with special tools.
no. you should never have antifreeze and oil mixed in a car engine. busted head gasket. cracked head. cracked block.
Most likely causes are a failed headgasket or cracked/warped head.
No.
No 2003 was a new refresh on the Neon, the shape and curviture are different.
the gap is .035 for a 2003 neon
The cam sensor is on the driver side of the cylinder head.
According to fueleconomy.gov, a 2003 Dodge neon gets 19 mpg in the city and 27 mpg on the Highway. The annual fuel cost of a Dodge Neon is about $2000.
The battery is under the hood on the driver side in a Dodge Neon.
At the minimum the head will need replaced.
On the driver side end of the cylinder head.
The PCM on a 2003 Neon is between the radiator and the transmission under the hood.
2003 dodge neon that will start but will not stay running and dies after it starts?