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Jerry
Jerry, Master Mechanic
Category: Saab
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Experience:  30+ years experience. Former shop owner, service manager.
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Saab: 1995 saab 900 turbo 2.0 stick fan goes on when hot stays

Resolved Question:

1995 saab 900 turbo 2.0 stick fan goes on when hot stays on over heats the lower radiater hose on passengers side is staying cold while fan is running , is this the water pump or head gaskit issue?
Submitted: 9 months ago.
Category: Saab
Expert:  Jerry replied 9 months ago.

Hello and welcome, Super mechanic here. Thank you for trusting us with your vehicle concerns, I will do my best to help you with your question.

.

That sounds like the thermostat. The coolant in the engine is hot and the hose is cool?

.

That would be the first thing to check and there is also a test that can eb done for the head gasket, (which I normally would do first to be sure that the engine is good) with a special tester.

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Would you want to replace, (or remove to test) the thermostat?

.

Customer: replied 9 months ago.
We replaced the thermostats
Expert:  Jerry replied 9 months ago.

Oh, I see.

.

Unfortunately, it sounds like you may have a blown head gasket and you’ll likely need to take it in to get it repaired or at least do the test yourself.

.

The first thing that you want to do is check the cooling system for any exhaust gases. There is a tester for that, that you can gt from Autozone for about $20. It comes with instructions, but there is a blue fluid that is used in it, if the fluid turns yellow, that is exhaust gases.

.

Block tester available as:

Napa BK.(NNN) NNN-NNNN/span>

OEM/Block Tester AUTOZONE

Part Number:
27145

http://www.autozone.com/autozone/accessories/Tools/Block-Tester/_/N-25dh?filterByKeyWord=block+tester&fromString=search

If there are any exhaust gases in the cooling system, that will cause more pressure than desired and will allow the engine to burn coolant and/or heat the coolant up too high. Most times not filling the crankcase with coolant either.

If there are, then there would be an internal engine problem, like a head gasket or head.


If you need more help, please use the reply tab to continue our conversation.

.

If you do not require further assistance, kindly rate my service.

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Thanks

Jerry, Master Mechanic
Category: Saab
Satisfied Customers: 12609
Experience: 30+ years experience. Former shop owner, service manager.
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