overheating issues

[93tsiawd]

Alright, When got the car it overheated in the middle of the day after about 20-30 min. not too much stop and go traffic, it just keeps climbing up to about 210-220 and sits there until i hit a light or 2 then its 240 and im running through gears to cool the rad down, which will get it back to 220-230 range but wont go back to 210 not even on the highway. or i pull into a parking lot as fast as i can.

I have done water pump, autozone special, also made sure it was pumping the right direction.
temp sensor, 160 t-stat and boiled it to make sure.
new hoses, t/b hose delete and heater core is bad so I looped the hose with no kinks.
It has a huge alfco rad with a pep boys fan no shroud i had checked out by a rad shop
I also flushed it, took off intake cleaned out jackets, and blew out heads and block with compressed air.

Im going to try a bigger fan from a loacl stang shop and a 75water/25 antifreeze mix with watter wetter tommarow but I really dont think its goin to
do the trick
anyone have any idea's and does anyone know how I could check to see if a head gasket is leaking, already comp tested and it was good. This is driving me nuts any help would be much apprciated thanks, George

 

[stang&2Birds]

"Most of the times", a compression check will show a bad head gasket. Note the word "most". An air leak-down test will also detect "most" bad head gaskets.

When both are done, a very large percentage, but not all, head gasket failures are detectable. It is "possible" that a head gasket, or head problem is present even with good compression and leak-down tests. "Possible", but very unlikely. Of course, if you have luck like some of us, you end up in that 0.5%.

 

[stang&2Birds]

It has a huge alfco rad with a pep boys fan no shroud i had checked out by a rad shop

If you don't have a fan shroud, then the fan is mostly useless! The fan will draw in air from the path of least resistance. In the case where there isn't a shroud, that path is from the sides of the fan, it is not through the radiator.

For a mechanical fan, you ideally want the blade tips to be 50% covered by the edge of the shroud. In practice, anything from ~20% to 90% works "okay".

You can get a Stang shroud pretty cheap. Check the local junk yards, the classifieds here, ebay etc.

Good Luck!

 

[93tsiawd]

Starter ****ted out on me today, pulled it and got a new one im going to throw it in tomaorow and see what happens. the fan is electric and im going to fab up a shroud over the weekend and put a better cfm fan on it. just found some t/f twisted wedges, so il find out if it was h/g Ill let you guys know what happens. thanks for the replies

 

[93tsiawd]

overheating

Made a rad shroud out of a 1/16 galvenized metal and put the electric fan on it. hoping this will help. it now pulls air over the whole rad very nicly. still need a starter. begining of the month bills killed me. Hopfully this week Ill have it fired up and see how it goes.

 

[93tsiawd]

o/h solved

well I belive the problem is solved here is everything I did
rad shround w/ electric fan
new waterpump and 160 t-stat(Im not driving through winter)
water wetter with a 60 water 40 prestone antifreeze
also replace hoses and ran 2 cycles of flush through
pulled intake and heater core railes and cleaned with air and water
also had radiator flow tested and cleaned it water and comressed air
it now runs city driving 190 highway 175-180 with fan on at all times