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300 with 4bbl wont idle.

jebadiah04

Rooster Snorkler
849
27
Intake gasket was bad. Runs fine as pie now.

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jebadiah04

Rooster Snorkler
849
27
Just need to bolt the exhaust back up, put in some ujoints and it should be mobile. Until the next thing surfaces anyways.

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DNFXDLI

The Token Canadian
Staff member
Nice Tater...pics of said rig?
 

jebadiah04

Rooster Snorkler
849
27
I can scrounge some up i bet.

Anyone have an old bench seat laying around or a set of mirrors?

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DNFXDLI

The Token Canadian
Staff member
Not I....you might want to check with Eric though.
 

jebadiah04

Rooster Snorkler
849
27
Got the mirrors. Now where is eric?

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jebadiah04

Rooster Snorkler
849
27
Next problem:

Over heating.

This thing over heats faster than Alexs dog in the back seat abandoned at the wall mart in the arizona sun.

After further investigation i have bubbles coming out of the over flow tank.

That leads me to believe i have one of 3 things
Cracked heads
Cracked block
Bad head gasket (which is new)

How can i attempt to narrow these down?

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dustybumpers

don't play well w others
Do a pressure test on the cooling system.
I bet head gasket.

Is the head AIR in head, or AIR in exhaust manifold?

The AIR in head system head cracks easily between the valves



If the head is cracked, now is the time to find a 240 head, and port and polish it.
 

jebadiah04

Rooster Snorkler
849
27
AIR?

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jebadiah04

Rooster Snorkler
849
27
If you are referring to smog pump it has been gone for years and its carbed so it would have to be manifold i believe.

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dustybumpers

don't play well w others
Not the pump itself, but the tubes it hooks too. The one with AIR in the head has a tube runs alongside of the valve cover, and connects to an injector at each cyl. These are fast burn heads. The chamber where the valves sit is in such a shape, it causes the casting to crack between the valves.

the Other head is a bit thicker in this area

I re read your origonal post, and wonder why you put the new head gasket on?

Did you have the head magnafluxed and trued then, or did you just lap the valves and put it back on the block?
 

dustybumpers

don't play well w others
This is a 240 head on my 300. It is a direct swap. I ported and polished it, so it breaths better. Have .020 cut off it, and it raises the compression to 9.5 to 1. You can run high test pump gas.

 

jebadiah04

Rooster Snorkler
849
27
I replaced it because water was gushing out between the head and the block. :)

Im sure its manifold air since the bung is still there and capped off with a huge plug :)

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DNFXDLI

The Token Canadian
Staff member
So your bung is capped off with a huge plug?

:suspicious:
 

jebadiah04

Rooster Snorkler
849
27
Yarp

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DNFXDLI

The Token Canadian
Staff member
I figured as much....I just wanted to be clear :D
 

dustybumpers

don't play well w others
I, um..... Not sure here what to say, lol




Did you have anything done to the head? I would at least take it to a machine shop, and have it milled, or belt sanded back to true. It sounds like the head was warped.

You really need to get a set of 87 and newer exhaust manifolds on there. The stock manifold is not very good at flowing exhaust out
I have headers on the carbed 300. it really woke up, but headers are a real PIA. I probably wouldn't do that again
 

nobodyspecial

Fire in the hole...
5,756
366
ND
I will buy your offy intake.
 

jebadiah04

Rooster Snorkler
849
27
Dont care about headers too much.

Truck is just to beetle around town. Id really like to sell it. But it should be running well first. :)

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