Help. Can't locate source of steam coming from passenger side

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Feb 11, 2026 | 05:55 PM

BrooseLee

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Help. Can't locate source of steam coming from passenger side

I have a 98 Camaro Z28/SS. First car I ever purchased. It's been a project getting it back to its glory days. My brother and I have had various issues that we have been able to diagnose/fix, but this one is eluding us. We can't seem to figure out where the source of this steam is coming from. Hopefully the videos can help someone help us.

From Engine Bay
From Interior

Feb 12, 2026 | 05:18 PM

LS1Formulation

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From: Grand Rapids, Michigan

My guess would be the steam ports on the back side of the heads. Either the line is cracked or the small gasket that goes under the fittings sprung a leak. Get a coolant pressure tester and see if it will hold pressure. Likely it will not.

Apr 11, 2026 | 10:22 PM

Terry1977

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I am having the same issue only instead of steam, I have a leak and it is on the passenger side. The heater core hoses and firewall are dry. Is this a pain to fix?

Apr 12, 2026 | 05:28 AM

Austin Phil

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Check for leaks at heater hose connections at engine side of firewall. If no leaks there, Looks like a leaking heater core. Click on below for heater core replacement:

Last edited by Austin Phil; Apr 12, 2026 at 05:45 AM.

Apr 12, 2026 | 05:42 AM