Chrysler — Compression Test
Testing & diagnosis · engine
From a Chrysler service manual covering: IND. 5, IND. 6, IND. 7, IND. 8. Check it applies to your exact model before use.
Procedure
- Start engine and warm to normal operating temperature.
- Remove all spark plugs and install compression gauge in one spark plug hole.
- Close the shut-off valve in the gasoline line, if provided.
- Open throttle wide and crank engine with starter.
- Four or five revolutions will give a normal pressure reading.
- Readings reasonably high and uniform, not varying more than 10 pounds between cylinders, are normal.
Tools required
- Compression gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Vary not more than 10 pounds between cylinders
Source: Chrysler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.