92 poor heater performance
Thread Starter
Cruising
Joined: Sep 2025
Posts: 10
Likes: 0
92 poor heater performance
My 92s heater outputs is poor, it puts out heat but in sufficient to comfortably warm the occupants. Was going to change the thermostat as a starting point but thought I'd look for some advice first. Thanks, Bill
Melting Slicks
Joined: Oct 2003
Posts: 2,204
Likes: 852
From: Chapel Hill NC
2025 c3 ('68-'73) of the Year Finalist - Unmodified
2025 C4 of the Year Finalist - Unmodified
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How's the air flow volume from the heater?
Thread Starter
Cruising
Joined: Sep 2025
Posts: 10
Likes: 0
not sure the return hose was 140, did not have a way to measure coolant. Cars in storage its winter here in ny. Will do more test then. Also dash was not working well just got it back from bettie.
Melting Slicks
Joined: Nov 2016
Posts: 2,256
Likes: 3,085
From: So Cal
2023 C4 of the Year Finalist - Unmodified
There is a restrictor in the smaller of the hoses. It is about 12" forward of the core, has two clamps on it. If there has ever been any stop leak or other band-aid stuff put in the cooling system, these restrictors get clogged.
If an incorrect thermostat has been installed, the heater loop will not have good flow. The thermostat for the LTx must have the little disc on the bottom to close off the bypass circuit when the temperature is 'on the stat'.
The other guys in your thread are asking the correct "first" question. What is the coolant operating temperature?
If an incorrect thermostat has been installed, the heater loop will not have good flow. The thermostat for the LTx must have the little disc on the bottom to close off the bypass circuit when the temperature is 'on the stat'.
The other guys in your thread are asking the correct "first" question. What is the coolant operating temperature?
Thread Starter
Cruising
Joined: Sep 2025
Posts: 10
Likes: 0
There is a restrictor in the smaller of the hoses. It is about 12" forward of the core, has two clamps on it. If there has ever been any stop leak or other band-aid stuff put in the cooling system, these restrictors get clogged.
If an incorrect thermostat has been installed, the heater loop will not have good flow. The thermostat for the LTx must have the little disc on the bottom to close off the bypass circuit when the temperature is 'on the stat'.
The other guys in your thread are asking the correct "first" question. What is the coolant operating temperature?
If an incorrect thermostat has been installed, the heater loop will not have good flow. The thermostat for the LTx must have the little disc on the bottom to close off the bypass circuit when the temperature is 'on the stat'.
The other guys in your thread are asking the correct "first" question. What is the coolant operating temperature?
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