2.3 T5 Engine compression PSI

[Trolley2182]

Hi there just a quick one can anyone tell me what the 2.3 T5 engine compression should be in psi ?
Thanks in advance

[Clan]

round about 180 psi i would think but the more important thing is the DIFFERENCES in readings between cylinders ... and when doing the compression test the engine must be warm and throttle held fully open ...

[st5ve]

Originally Posted by Trolley2182

Hi there just a quick one can anyone tell me what the 2.3 T5 engine compression should be in psi ?
Thanks in advance

The Haynes manual reckons 11 to 13 bars = 159.5 to 188 psi

http://www.centauro-owners.com/articles/psibar.html

[Trolley2182]

thanks for your replys ! Just a bit paranoid seen as my engine has been collected today and the bloke said hes remembered all cylinders were 150psi... he said this as if it was a good thing and i should be impressed ! He does sound like a decent genuine bloke who was a bit handy with a spanner so maybe he ment when cold or hes got it wrong !

Its gunna have to go in anyway as i need a car. If its pants ill just rebuild the old engine and hope this lump lasts till i can afford the rebuild.

[st5ve]

Originally Posted by Trolley2182

thanks for your replys ! Just a bit paranoid seen as my engine has been collected today and the bloke said hes remembered all cylinders were 150psi... he said this as if it was a good thing and i should be impressed ! He does sound like a decent genuine bloke who was a bit handy with a spanner so maybe he ment when cold or hes got it wrong !

Its gunna have to go in anyway as i need a car. If its pants ill just rebuild the old engine and hope this lump lasts till i can afford the rebuild.

150psi is fine plenty of life left in it, my 855 R was running 125psi before I replaced the engine it was running fine and had a bit of life left init before it when to engine heaven

[Merc85]

Hi peeps,

I have a Thread in Compression tester gauge and i would like to carry out a compression test on my 850 t5 lump.

How do i carry out the test? should i remove one plug and crank it over 4-5 turns? on the starter? or will this give wrong readings?

Any help much apreciated.

[Merc85]

Just found this,

http://bikearama.com/how-to/engine-compression-test/

[Clan]

Originally Posted by Merc85

Hi peeps,

I have a Thread in Compression tester gauge and i would like to carry out a compression test on my 850 t5 lump.

How do i carry out the test? should i remove one plug and crank it over 4-5 turns? on the starter? or will this give wrong readings?

Any help much apreciated.

remove all the plugs after warming up the engine , then do your tests , you will need someone in the car to crank it over and hold the throttle pedal fully down . The actual pressure isnt as important as the balance between the pressures . ie they should all be equal as near as possible .

[Kingsford G]

Originally Posted by Clan

remove all the plugs after warming up the engine , then do your tests , you will need someone in the car to crank it over and hold the throttle pedal fully down . The actual pressure isnt as important as the balance between the pressures . ie they should all be equal as near as possible .

Is holding the throttle down important?I`ve done mine without holding the throttle down and reading 170psi so if not held down will it read more or less?

[Clan]

Originally Posted by Kingsford G

Is holding the throttle down important?I`ve done mine without holding the throttle down and reading 170psi so if not held down will it read more or less?

Your pressure is pretty healthy and with the large inlet manifold volume it probably wont make a lot od difference , but it is normal praqctice to open the throttle so you get a full charge of air into the cylinder to compress . If you crank it with throttle shut incoming air is restricted so pressure will be less .