compression test

[risingphenix]

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?

[Tezmaster]

you want like 150 psi! i have 1988 gts celica with 150 150 155 160 psi with oil

[Tezmaster]

all tho its fine any thing over 110 psi is alright
but if you want it better its rebuild!

[keving85]

Originally Posted by risingphenix

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?

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

[Tezmaster]

well its 2.0 liter!

[keving85]

Originally Posted by Tezmaster

well its 2.0 liter!

a good healthy motor sould be around 190 psi anyhow..... new motors put around 200-220..... i am talking about stock running engines..... the 5sfe motor is a 2.2 liter motor.... that i looked at.....

kev......

[Tezmaster]

kk on saturday or friday night im gonna redo the comprssion test and ill show results

[keving85]

Originally Posted by Tezmaster

kk on saturday or friday night im gonna redo the comprssion test and ill show results

ok put just a few drips of oil down there to get a better reading....