1994 Oldsmobile Cutlass Heater blows cold. Engine overheats

JSCZYNSKI

MEMBER
1994 OLDSMOBILE CUTLASS
6 CYL
4WD
AUTOMATIC
171,828 MILES

My 1994 Cutlass Supreme 3.1lv6 overheats and the heater blows cold. Is it my heater core or is it my thermostat. I think it's my thermostat because coolant stays in the coolant bottle at full hot all the time. Any help would be appreciated. Thanks!

Monday, January 21st, 2008 AT 9:23 AM

4 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Get the thermostat replaced-that don't work comback

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Monday, January 21st, 2008 AT 9:31 AM

JSCZYNSKI

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48 POSTS

Thanks a million. Do they make the fail safe thermostat for that model?

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Monday, January 21st, 2008 AT 9:50 AM

RASMATAZ

MECHANIC
75,992 POSTS

No, who told you there's such thing as fail safe mode on a Stat-enlighten me a lil bit or am I just getting rusty.

The heater is not blowing hot air because the thermostat is shut closed not permitting the coolant to move all over the engine and to heater core.

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Monday, January 21st, 2008 AT 10:14 AM

JSCZYNSKI

MEMBER
48 POSTS

No no your right with the Stant brand. They don't have a fail safe mode but autozone does sell a fail safe brand type.

Thanks for your help. I'm in the process of draining the coolant as we speak! I appreciate your help.

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Monday, January 21st, 2008 AT 11:10 AM