Ford 302 issues

[Jakem]

I have posted on here about what seamed to be an overheating issue. My expansion jug fills and won't drain back to hx. The fluid is Luke warm. I have had the heads off and replaced valve seals...head gasket..manifold and exhaust gaskets. It still does the same thing with the antifreeze and first run umderload I could smell burnt valve and also fuel. That went away after a while. Lacks power...I'm baffled

 

[Jakem]

I have posted on here about what seamed to be an overheating issue. My expansion jug fills and won't drain back to hx. The fluid is Luke warm. I have had the heads off and replaced valve seals...head gasket..manifold and exhaust gaskets. It still does the same thing with the antifreeze and first run umderload I could smell burnt valve and also fuel. That went away after a while. Lacks power...I'm baffled

I also changed thermostat...oil...new antifreeze

 

[Scott Danforth]

Have you stsrted with the impeller?

Also, check compression

 

[Jakem]

Impeller is new...water pump is new...I just don't get why the jug gets full and doesn't drain back....if I pop the rad cap it flows back....rad cap is also new

 

[alldodge]

With the HX cap removed are there any bubbles?
As in maybe a head gasket issue

 

[Jakem]

The head gaskets are new as well as intake

 

[alldodge]

I understand, but your saying the coolant is pushed out, overheats and doesn't get sucked back in.

 

[Jakem]

Right...and as the jug fills the coolant isn't even hot like I can hold my finger in it. Everything has been revealed and it still does it

 

[jhande]

Is the motor getting hot, hotter than the overflow?
When the motor sits and cools down, removing the HX cap is the coolant level low?
The cap could be the wrong PSI setting.
Something might be constricting the coolant flow through the motor.
Depending on the type of head gaskets used, were the re-torqued?
Could be air bound, air pocket in the cooling system.
As mentioned above, run motor with HX cap removed and watch for bubbles and/or flow.

 

[Jakem]

It gets low yes because it doesn't stop filling the tank. I have a 14 psi cap. All hoses are clear and manifolds look new inside. They are felpro head gaskets

 

[Jakem]

Head bolts are new arp. Intake gaskets new. Valve seals new

 

[jhande]

If it was me, I'd do a compression test.

 

[Jakem]

I am going to today and I'll post results...what's a good number..150 ish

 

[alldodge]

I am going to today and I'll post results...what's a good number..150 ish

Correct

 

[Jakem]

Compression test...starboard 125...port all 120 except 8....it's 115

 

[Jakem]

Sorry number 6 was 140

 

[alldodge]

That's bad for a rebuilt, weak for and old one
Check for moisture in 6

Could do a leak down test to determine if its rings or valves but my guess is a head isn't flat within .003

 

[Jakem]

It isn't rebuilt...I only did valve seals and gaskets

 

[Jakem]

Plugs had oil on them to

 

[alldodge]

Motor needs rebuild or replaced