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Where and how do you get to the lower radiator hose on 99 Cadillac sts

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Re: Where is the lower radiator hose?(99)

Stand in front of the car, open the hood, and face the engine.

On the left hand side of the radiator, at the top, is the upper radiator hose; which goes to the upper water pump connection.

On the right hand side of the radiator, from the bottom, is the lower radiator hose; which goes to the lower water pump connection.

Where is the lower radiator hose 99
It is a forum and goes on about draining the radiator.

Posted on Mar 31, 2015


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Posted on Jan 02, 2017



  • 11 Answers

SOURCE: Cadillac seville sts 99 overheating

dose it have an electric fan ? if it does look to see if the fan is working hope this helps.

Posted on Dec 25, 2008


  • 95 Answers

SOURCE: 1996 cadillac sts overheating no apperant reason,

Same problem with my 96 cadillac, don't be a fool like me, or anybodyelse and replace things such as RADIATOR, THERMOSTAT, WATER PUMP, HEATER CORE, HOSES, RADIATOR CAPS, RADIATOR FANS, And don't waste all of your money on coolant like i did. It is either Head Gasket, or Head Bolts pulled. I have replaced everything above and more, and still overheats, just as other people said and told me HEAD GASKET and i did not listen, now i wasted all of my money on stuff that did not need to be replaced. I'm sure you have a Northstar? Like me? One of the worst engines ever built in my book. Sell it quick if you do not have the money to fix it with, which is very costly. Or get a 4.9 which is more stable.

Posted on Aug 12, 2009

Amanda C

  • 75 Answers

SOURCE: My 99 Cavalier keeps steaming and overheating. I

90's Cavaliers are notorious for problems such as these.

I hate to be the barrier of bad news, but in this case I would suggest that your engine either has a blown head gasket, and/or a warped head.

There is also the possibility that you blew a "soft plug" or cracked the block and that the coolant is leaking out through the base of the engine.

To find out of you have a blown head gasket, you can remove the oil cap from the valve cover and inspect it. If it has a yellow-brown-ish goo that is the consistency of paint, then you definitely have a blown head gasket and coolant has mixed with your oil. Meaning that you likely need an overhall.

You can also check by removing your radiator cap and checking to see if little tiny bubbles come up while the car is running. That is a sign of a compression leak, meaning that you most likely have a crack somewhere in either the cylinder head or the block.

Also, those cars have many very small radiator hoses that are in the middle of the engine and hard to see, find or replace.

In this instance, it sounds like your car has over heated more than 4 times, and once you get to that point you are likely to have fried the engine. This is because the newer engines are mostly aluminum and can't stand that much heat that often.

I would suggest seeking either a new car, or seeking a used engine to replace in your car. A used engine for those is fairly cheap compared to the price of fixing the problems that are likely to have occurred from excessive over heating.

Posted on Nov 11, 2009


Mark Carrington

  • 192 Answers

SOURCE: my 1995 cadillac seville sts is over heating i

The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,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 close to the thermostat housing,the blockage may be there.

Posted on Jun 19, 2010



  • 3113 Answers

SOURCE: My radiator fans will not

They will only come on if the engine is over 225 degrees or the ac is on.The fans are controlled by the pcm. There are three fan relays located in the relay center under the hood on driver side. The puller fan (radiator side) is controlled by the PCM and relay B which is the first relay on the right side of the relay center counting from the front of the car (nearest driver side headlight).

Posted on Jun 02, 2011

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