Ford 302 problem

Found my zero compression source. After taking off the intake manifold I decided to hook up the compression gauge and try it again. While cranking and still no compression I felt air escaping out of the valve port of the zero cylinder. I put my hand over the port while cranking and was getting a alternating sucking/ blowing out of the port. So probably valve, will pull the head tomorrow.

 

Solid or hydraulic lifters?

 

pretty sure there hydraulic

 

Update. Pulled the head did a leak test with head out. The zero compression # 2 cylinder had a bad intake valve leak ran out as fast as I poured the water to the valve , #4 also had slow leak. So now deciding rebuild the bad one and leave other or put new in both.

 

If one head has 2 bad valves, how good can the valves in the other head be? You are only a head gasket away from doing it right. I would pull the other head and either buy a good pair, or have both of your heads rebuilt.

 

X2

 

Yes thank you that is the plan. I'm wondering to the heads have roller rockers with hydraulic flat tappet lifters, not roller from what I researched that shouldn't be done.

 

Roller rockers can be used with flat tappets with no problems. Been done forever, long before the roller tappet became commonplace. It's crazy how bad information keeps propagating.

 

Yes thank you, I see that after searching more on the topic.

 

Wouldn’t hurt to inspect all the tappets for wear while you have it that far apart.

 

If you pull the tappets to inspect them, do one tappet at a time. I's very important that each tappet returns to the valve in the cylinder it was broken in at. Do NOT mix them up if you intend to reuse the cam or the lifters.