Overheating after overhaul

Tiny
GEORGERINGIRISAI
  • MEMBER
  • 1998 AUDI A4
  • 1.8L
  • 4 CYL
  • TURBO
  • FWD
  • MANUAL
  • 250,000 MILES
Engine overheats after a short drive of less than five km. Put new head gasket on engine. Head went for skimming, but not pressure testing. Car has closed circuit cooling system.
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Monday, January 2nd, 2017 AT 10:41 AM

7 Replies

Tiny
JOHNNY G.JR
  • CERTIFIED MECHANIC
Have cooling system pressure tested. Check level of antifreeze in radiator and reservoir first. Compression test cylinders, then a cylinder leakdown test. Exhaust steam would show bad gasket or cracked head or block.
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Tuesday, January 3rd, 2017 AT 1:07 AM
Tiny
GEORGERINGIRISAI
  • MEMBER
Thanks will check on exhaust steam and give update.
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Tuesday, January 3rd, 2017 AT 2:11 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
Hey GEORGERINGIRISAI,

It sounds like you have a stuck thermostat. Here are a couple of guides that will help you get the problem fixed.

https://www.2carpros.com/articles/replace-thermostat

and

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Please let us know what you find so it will help others.

Best, Ken
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Friday, January 6th, 2017 AT 3:48 PM
Tiny
GEORGERINGIRISAI
  • MEMBER
I also discovered that the oil cooler was by-passed.
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Sunday, January 8th, 2017 AT 8:41 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
That is good but it wont cause the engine to overheat in 5km. Have you done the thermostat?
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Sunday, January 8th, 2017 AT 10:21 PM
Tiny
GEORGERINGIRISAI
  • MEMBER
Where can I locate the thermostat on an Audi A4 1.8T 1998 model
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Tuesday, January 10th, 2017 AT 8:27 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
Hey GEORGERINGIRISAI,

It is in the bottom of the water pump, here is a diagram to help find it.

Let us know what happens.

Best, Ken
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Tuesday, January 10th, 2017 AT 11:16 AM

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