New 383 in 84 c4 immediately overheating HELP!
Thread Starter
Cruising
Joined: May 2014
Posts: 10
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New 383 in 84 c4 immediately overheating HELP!
Any help and or suggestions would be appreciated. Fresh mild cam 383 rebuilt at Texas Motorsports using stock 84 engine. 1.5 roller rockers, ported intake, blocked off egr, new water pump, hoses, confirmed pump is spinning correctly, 8 degrees timing, fuel pump from a 85. Start engine and within about 5 min I have to shut it off. Engine at 230 hoses & rad at 100. Help
Burning Brakes
Joined: Mar 2005
Posts: 800
Likes: 2
Sounds like some kind of blockage. I'm not familiar with the 84'sso excuse me if I'm off base here, have you been able to confirm coolant flow? Try bleeding the cooling system. I know on the L98 cars it helps to elevate the front of the car. Have you tried that? I would almost be willing to bet you have a air pocket at the temp sensor for dash.
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Team Owner
Joined: Aug 2004
Posts: 21,543
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From: Park City Utah
1. water pump isn't working or
2. you haven't filled the cooling system enough for the pump to circulate water.
Instructor
Joined: Sep 2007
Posts: 127
Likes: 13
From: Apollo Beach. Fla
These guys are on the right track. If your engine is really 230 (gauge actually working) and your radiator is at 100....you're not circulating coolant. If you removed the t-stat and had the same results, then either:
1. water pump isn't working or
2. you haven't filled the cooling system enough for the pump to circulate water.
1. water pump isn't working or
2. you haven't filled the cooling system enough for the pump to circulate water.
Thread Starter
Cruising
Joined: May 2014
Posts: 10
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Removed the water pump & verified it is spinning correctly counterclockwise. I spoke with the engine builder and he said to put in the intake gaskets that do not have the rear ports blocked. the ones that are on it have the rearports blocked because it matche the originals.
Team Owner
Joined: Aug 2004
Posts: 21,543
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From: Park City Utah
Safety Car
Joined: Jan 2004
Posts: 3,783
Likes: 15
From: Northern California
To me, it looks like the water pump blade is designed to spin clockwise. The paddles are not pushing the water at all in the #2 direction...
It looks to me like you have a Standard Rotation water pump. You need a Reverse Rotation water pump...
.
It looks to me like you have a Standard Rotation water pump. You need a Reverse Rotation water pump...
.
Last edited by GKK; May 23, 2014 at 01:19 PM.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Looking at it, as it sits in the photo, it needs to turn clockwise. However, in the photo, we're looking at the "back" of the water pump. Walk around to the "front" of the pump -the side you normally see and discuss pump rotation from- and that clockwise becomes COUNTER CLOCKWISE. 
Suckin' gas, haulin' ass.
Joined: Apr 2010
Posts: 1,100
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From: Newport News Virginia
That is incorrect. It is spinning the right way. Water pumps are designed to pull water from the center and push it outwards. They are centrifugal pumps.
Suckin' gas, haulin' ass.
Joined: Apr 2010
Posts: 1,100
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From: Newport News Virginia
Thread Starter
Cruising
Joined: May 2014
Posts: 10
Likes: 0
here's a picture of how the intake gaskets are now. this is how it was when I took it apart. the engine builder is telling me to use gaskets that do not have the rear cooler ports blocked. what do you guys think?