Coolant spewing but not overheating

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Nov 13, 2024 | 04:35 PM

Boztek Enterprises

Thread Starter

Heel & Toe

Joined: Aug 2023

Posts: 23

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From: Arlington, TX

Coolant spewing but not overheating

Good Afternoon all. I have a 92 LT1 6spd. Here lately, once the car gets up to temp (200-205) and has been there for 10 minutes of driving, it has started spraying coolant all under the hood. I "think" it's coming from the thermostat housing. It only does it while driving, not while it's sitting and it is NOT OVERHEATING. Temp never gets over 205 and it does it with the A/C on or off. It is also intermittent. Basically, if I drive it to work, 12 miles of residential one way, it does it as I pull up to my office or to my house in the afternoon, but not every time. 49k original miles, bone stock and all original. I'm thinking thermostat went out so I'm replacing that, but I didn't know if anyone else had any insight. This car has never given me a day's problem in the 12 years I've owned it.

Can anyone help me out here?

Nov 13, 2024 | 05:03 PM

Nowhere Man

Team Owner

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From: Sitting in his Nowhere land Hanover Pa

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are you over filling it

Nov 13, 2024 | 05:07 PM

Boztek Enterprises

Thread Starter

Heel & Toe

Joined: Aug 2023

Posts: 23

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From: Arlington, TX

Nope. Everything shows to be at correct level, no air in system according to the bleeder valve on the thermostat housing.

Nov 13, 2024 | 05:33 PM

Krusty84

Drifting

Joined: Mar 2018

Posts: 1,362

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From: DFW TX

Bad rad cap? Hole in a hose somewhere? If the system can't build pressure, then it will boil over near the boiling point.

Nov 13, 2024 | 05:57 PM

beermanpete

Instructor

Joined: Jul 2024

Posts: 163

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From: Northridge, CA

You need to watch it leaking to see where the leak is. When the engine is cold, open the hood, start it and wait until it starts leaking. It will likely start slowly and get worse as the pressure in the cooling system rises. Be careful to not get burned.

Nov 13, 2024 | 06:34 PM

ex-x-fire

Melting Slicks

Joined: Dec 2009

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I bet that lower disc on the t stat fell off.

Nov 15, 2024 | 06:17 PM

Techun

Instructor

Joined: May 2023

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From: Pennsylvania

Cheap and easy try, get a new rad cap

Nov 17, 2024 | 10:58 AM

Whaleman

Safety Car

Joined: Mar 2017

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From: LeClaire Iowa

You need to first see where it is "spraying" from. I would borrow a cooling system pressure tester from a box store and see just where it is leaking. That will tell you where the problem is. Dan