Help .. Valve noise

[capt1e3]

Ok I'm about fed up with Murphy's Law and my CJ7 . It died on my last week and wouldn't restart. Diagnosis jumped timing. I installed a new set of gears and a new chain (could almost remove chain without touching gears-upper nylon junk). Now after buttoning it up I fire it up and now I have lifter noise. I ran it and checked timing and its right on the mark. Also it is reading good oil pressure. My jeep is a 77 CJ7 with a AMC 304 . Anyone have an idea where to start on this? Thanks.

 

[jamie]

before you tear the motor apart again, try some seafoam or marvel mystery oil. sometimes its that simple

 

[capt1e3]

worth a try ...thanks

 

[73CJ]

How many teeth did it jump? Might have bent a valve? Do a compression check.

Might just be dirty, sticky lifters.

I don't know what AMC was thinking with those fiber gears. I went though one every 25k mikes on my 74 Javelin when new. Steel gears changed that.

 

[CJ]

How many teeth did it jump? Might have bent a valve? ~~~

Stock AMC 304 's cannot bend a valve, there are always valve and piston clearance...

 

[73CJ]

Stock AMC 304 's cannot bend a valve, there are always valve and piston clearance...

Looking at the stock specs, looks like you're right. No wonder I never bent a valve after goining through 3 timing gear sets.


'74-78 AMC 304
'74-79 360 '74-78 401 Lobe lift .266" .286" Valve lift (1.6x) .426" .458" Intake valve opens 14.75* BTDC 25.57* BTDC Intake valve closes 68.75* ABDC 90.75* ABDC Exhaust valve opens 56.75* BBDC 80.80* BBDC Exhaust valve closes 26.75* ATDC 42.75* ATDC Valve overlap 41.50* 68.32* Intake duration (adv) 263.50* 296.32* Exhaust duration (adv) 263.50* 303.55*