B18C Compression Test

[ace167]

Hi guys,

Just wondering what the best way to do a compression test is on a B18C motor. I've done some reading and obviously it's pretty similar to other cars however my questions are:

- What is the expected PSI in the cylinders, I've read around 200 is what you want for these motors
- How do you prevent the fuel from going in as you crank the motor i.e. is it best to disconnect a fuse, cam angle sensor? Or is it ok to leave them plugged in - I would've thought that it would flood the motor

If I've missed anything please feel free to educate me!

Thanks

[tinkerbell]

- 180-200psi
- you remove the ecu fuse or you connect a wire from 12V to the starter and manually crank it

(it really sounds like you need to google soem more... try checking out some youtube vids?)

see: http://www.c-speedr.com/howto/comptest/comptest.php

[ace167]

Thanks Tinkerbell.

I'm aware of the process however each engine is different and couldn't really find much on B18's specifically - thanks for the link.

[dc2typ35r]

How would I run a compression test with the motor out of the car?

Motor has transmission

[tinkerbell]

remove sparkplugs,
attach comp tester
attach battery -ve to gearbox, hold battery +ve to starter motor,
read reading
repeat 4 x