compression test

[anthonypo5653]

Okay guys I'm guessing there is already a post for this but I don't have time to look. I did a compression test on my 1989 f250. all the cylinders were very close to 400 psi if not at 400 psi. But my back passenger cylinder was just under 300 psi what would cause this?

 

[IDIoit]

cracked cast iron, valves, seats, headgasket, cavitation, rings, or piston

 

[riotwarrior]

cracked cast iron, valves, seats, headgasket, cavitation, rings, or piston

Who are you? *** did you do with brian?

Just sayin...yer not Brian cause u didnt rant on about a leakdown test...so who are you?

 

[laserjock]

 

[IDIoit]

DO A ******* LEAK DOWN TEST!

 

[mblaney]

Well that escalated quickly...

 

[riotwarrior]

DO A ******* LEAK DOWN TEST!

Ahh I see Brian is back...that musta been Brianne earlier

 

[icanfixall]

Ahh I see Brian is back...that musta been Brianne earlier

Easy on that name there mister.. Thate exactly how our Daughters name is spelled...

 

[IDIoit]

get em' Gary