compression test

risingphenix said:

How much psi should a 5s-fe motor have. I have 120 on all the cylinders, although i haven't tried to put oil in the cylinders, i did it dry.

And is it possible for low compression if the cat is blocked?

Click to expand...

THis is for a 95 celica

let me know your vehical year and all and i will give you more details... this is for the 2.2 motor you described

COMPRESSION CHECK

HINT : If there is lack of power, excessive oil consumption or poor fuel economy, measure the compression pressure.

1. WARM UP AND STOP ENGINE Allow the engine to warm up to normal operating temperature.
2. DISCONNECT DISTRIBUTOR CONNECTOR
3. DISCONNECT HIGH-TENSION CORDS FROM SPARK PLUGS
4. REMOVE SPARK PLUGS
5. CHECK CYLINDER COMPRESSION PRESSURE

(a)Insert a compression gauge into the spark plug hole.(b)Fully open the throttle.(c)While cranking the engine, measure the compression pressure.
HINT : Always use a fully charged battery to obtain engine speed of 250 rpm or more.


(d)Repeat steps (a) through (c) for each cylinder.
NOTICE : This measurement must be done in as short a time as possible.

Compression pressure: 1.226 kPa (12.5 kgf/cm2, 178 psi) or more
Minimum pressure: 981 kPa (10.0 kgf/cm2, 142 psi)
Difference between each cylinder: 98 kPa (1.0 kgf/cm2. 14 psi) or less

(e)If the cylinder compression in one or more cylinders is low, pour a small amount of engine oil into the cylinder through the spark plug hole and repeat steps (a) through (c) for cylinders with low compression.

• If adding oil helps the compression, it is likely that the piston rings and/or cylinder bore are worn or damaged.
• If pressure stays low, a valve may be sticking or seating is improper. or there may be leakage past the gasket.

1. REINSTALL SPARK PLUGS
2. RECONNECT HIGH-TENSION CORDS TO SPARK PLUGS
3. RECONNECT DISTRIBUTOR CONNECTOR