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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

383 Overheating

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Old Jul 12, 2011 | 10:33 AM
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Default 383 Overheating
Replaced the radiator cap: wasn't holding pressure
New Intake Manifold Gasket: very slow leak.

Still getting up to 220-230 while driving.

I have a meziere (sp?) water pump so I can't bleed it through the screws right? I've been leaving the cap off with the pump running while adding coolant to bleed. Haven't flushed coolant yet. Considering an aluminum radiator but don't really have the money. Is it possible the gauge is reading wrong?

Hooked it up to the shop's diagnostics but it won't read (possibly because of the PCMforless tune?)

Hellllp. Somebody give me a new idea.
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Old Jul 12, 2011 | 10:37 AM
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at what temp do your fans turn on? Thermostat...is it a 160 deg?
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Old Jul 12, 2011 | 10:41 AM
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Yea, 160. Thermostat has been checked. It's opening properly. I have a manual fan switch so they are both on at all times while I'm driving it. I did a visual check to make sure both fans are running...they are.
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Old Jul 12, 2011 | 10:43 AM
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I have a CSR EWP as I recall I was able to bleed the system using those screws
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Old Jul 12, 2011 | 10:43 AM
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Also..no boiling over or steam. Just the slightest smell of coolant when I park it.
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Old Jul 12, 2011 | 10:45 AM
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Alright, I'll try bleeding through the screws. Maybe I was mistaken but I thought it would just spew coolant out if I opened them with the pump on.
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Old Jul 12, 2011 | 11:02 AM
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If it spews liquid out, there is no air pocket
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Old Jul 12, 2011 | 01:59 PM
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Yep. Pure liquid came out when I tried to bleed it after warming it up. Coolant level is fine. Just got it up on ramps. Going to check again that both fans are working because it doesn't seem to make a difference which setting I have my SLP fan switch on. Maybe one died in the midst of all these other things I've done to chase this down.
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Old Jul 12, 2011 | 02:08 PM
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Both fans running with the switch engaged.
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Old Jul 12, 2011 | 03:51 PM
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I just noticed that I mounted my tranny cooler on the front of the radiator....is that right? Or could that be the problem?
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