It runs hot and bubbles in my reservoir already replaced water pump heat sensor
SOURCE: replace power steering pump and lines 1992 cadillac seville sts
you need to have a pulley puller to get the pulley off if you don't have one most auto zone part stores have a loan a tool program and they can help you with that on most powersteering pumps the high pressure line will be a fitting or bolt on and the return line is usually just a squeeze clamp hope this helps good luck
SOURCE: Need to replace both crankshaft position sensors 2001 Cadillac
4.6 the twocrankshaft position sensors are located on the front of the block just above and to the left of the oil filter. not hard to replace.
SOURCE: i have a 95 cadillac seville i need to replace the water pump i
First of all,you need the removal tool which looks like this.
http://www.etoolcart.com/gmnorthstarwaterpumpsocketast7880.aspx
You need to remove the air filter housing and ducting to gain easy access to the pump.
Remove the shield covering the pulley and belt. The belt is easily removed by levering the tensioner pulley.
The water pump is located at the lower radiator hose manifold where you
will also find the thermostat.Remove the manifold cover and you will
see the water pump.
Insert the removal tool over the pump making sure it is locked in
position.You will need to use a breaker bar on the removal tool and
turn the tool CLOCKWISE to release the pump (1/4 turn), or if you
imagine the breaker bar being vertical, push towards the windscreen of
your car,it takes quite a bit of force to unseat the pump hence the use of a breaker bar.
Installing the new pump does not require as much torque as removing the
old one.Tighten the new pump to 73 ft.lbs. making sure it is seated
properly before tightening.
Don't forget to clean out the water pump housing prior to installing
the new pump and don't forget to include a new water pump gasket and
housing cover gasket.
It is also a good idea to install a new thermostat while you're at it.
Just as an aside, the Northstar is a 4.6 , not 4.8.
SOURCE: my 2001 cadillac deville is running hot still, i
When the car is completely cool,check the electric fan(s) for smooth rotation.
Clean/check/change the thermo sensor,contact and wire.
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Excavate air pocket in coolant system / check for head gasket leak
This test will kill two birds with one stone.
===
MAKE SURE THE COOLANT SYSTEM and ENGINE IS COLD!
RAN THIS TEST IN A WELL VENTILATED AREA ONLY!
You will spill some coolant during this air pocket purge test.......BE
KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test!
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Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) .
Top of the coolant reserve tank
Let it ran for 10-15 minutes.
Monitor for air pockets escaping from coolant reserve tank.
Small amount of bubbles is OK at 1-5 minute mark
After the thermostat open up (after 195 F warm up) at
5-12 minute mark or after high idle you should see less bubbles.
If you do not see any in rush of bubbles then your thermostat may be
partially stuck or rusted badly inside the thermostat hosing.
Give the thermostat host few gentle taps.
If you see larger bubbles surfacing after 15 minutes then should do a
hydrocarbon (HC) dye test to test for potential head gasket leak.
Let engine cold down and top off coolant reserve tank.
Start monitor for coolant lost
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A coolant flush is require every 2 years or 24,000 miles.
I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses.
Make sure you get a new thermostat gasket,black RTV and fresh coolant for the job.
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SOURCE: i have 1998 cadillac seville w/northstar motor
The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.The hose goes in to the engine to a crossover and comes out the other side to near the thermostat housing,the blockage may be there.
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