Northstar Engines and System Technical Discussion Discussion, Head Gasket Repair in Cadillac Engine Technical Discussion; First of all allow me to introduce myself, my name is Erik im 20 years old and im in love ...
First of all allow me to introduce myself, my name is Erik im 20 years old and im in love with Cadillacs.A few months ago i bought a 1997 deville with a blown head gasket for $700. A tech i know who has never had a comeback from timeserting engines ( has time-serted numerous northstars for his own family) helped me out. Anyways today i finally finished everything, since we had the engine out i replaced almost all the seals. So after im done with everything i start it up but i notice the temperature rises pretty fast. Im very concerned about it so my question to you guys is basically what happens as far as coolant temperature and all that other good stuff, there is no SES light. Thanks for the help.
Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
MD Eastern Shore - Kent Island
Re: Head Gasket Repair
Not sure whether you have a gauge or a digital bar readout.............
The thermostat is set to begin at 188 and be fully open at 206. Fans run in slow with any HVAC function that calls for the A/C compressor to run, including defrost. If A/C is not set, then the fans are controlled by the coolant temp sensor only and will come on in SLOW at 224 degrees and FAST at 236.
Initial warmup should be fast - the gauge/bars should get to that 12:00/center bar quickly - the system is set up that way. BUT then the gauge/bars should stay steady unless you're in heavy traffic.
Coolant level should be halfway up in the tank, cold - no higher than that. Another check is the purge line - that small hose which runs from the upper side of the coolant reservoir to the water pump housing nipple (actually a hollow bolt). The purge line constantly pisses a stream of coolant from the water pump discharge to the reservoir in order to purge the coolant of air and gasses in order to prevent corrosion and water pump cavitation from air bubbles. With the engine cold, remove the tank cap and the tank end of the purge line. Hold the end of the purge line in the tank neck. Have an assistant start the engine and check that a stream of coolant flows from the purge line.
After a few days of level checks the coolant level should stabilize at halfway up in the tank, cold.
Thanks for the response sub, the dash is a digital one but it doesnt have a bar. I have to go by the actual number the IPC says, when it i seen it quickly jumped to about 210 i shut the car off. This was my first major job so im very nervous.