Bet you dont know the answer....

[samuraichamploo]

Heres the deal.
The 5.0 had NO compression (well, 10 psi) in #4 cylinder when i got it.
After I tore it apart, expecting something horrible, i couldnt find ****.
Pouring oil down the piston didnt help ****, so piston rings is out.
the heads were checked and decked by napa. No problems with them.
AHA! 2 of the lifters are stuck?!!?
replaced the lifters, put everything back together. and. 40 psi.
wtf. pour some more oil down the piston. what happens? it DROPS to 30 psi.
(this is all done on 4 cranks BTW)
so what the **** is wrong? I bet you dont know!!!!

 

[samuraichamploo]

ttt

 

[TT91]

have you taken the pistons out?

 

[408stroker5.0]

Were all the Spark Plugs in the Motor at the time of Compression Test?

 

[jerry beach]

Your compression tester is no good?

 

[Ranchero5.0]

Mr. piston, meet mr. valve. Never ever seen a lifter just stick in it's bore.

 

[1slyfox]

bent valve?

 

[Idwitheld-1`]

leak down test.

And no, its not a drinking game!

 

[Notchbck93]

Idwitheld-1`>>> Listen to him, do a leak down test and stop the guessing. Listen to where the air is leaking out. Its a no brainer!

 

[jrichker]

See the link in my sig to build your own leak down tester...

 

[HISSIN50]

i came across this and want to know what it was.