How To Flush, Fix Overheating, Leaks, Coolant Reservoir, Radiator Replacement: Cadillac Northstar
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- čas přidán 4. 09. 2020
- Links Below: Cadillac Northstar engines are known for overheating. This Deville had a slow coolant leak & a history of overheating due to a failed water pump. How to diagnose & repair several coolant leaks, replace the coolant reservoir, install a new thermostat and flush the coolant system.
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Enjoying your videos. Old cars may drive me to drink. May consider bourbon as a cure. Maybe you could recommend a good brand. I knew nothing about Northstar Cadillacs. Never even considered myself a fan of the brand. But last summer I managed to buy a pair of the "tri-nines." Little did I know of their infamy. What "Bro Stone" calls the short "header bolts." LOLOLOL So my '97 DeVille D'elegance has had overheating/coolant loss issues. I had my longtime trustworthy mechanic replace the coolant tank that I ordered from GMPartsNow. Not sure if he checked/cleaned/blew out the line that goes underneath the big silver engine cover. I'll be checking this on my next day off. I may try to tackle the thermostat changeout under your tutelage. TYVM for the great videos. I subscribed.
Hi Jim, thanks very much for the comment and subscribe. I'm glad my videos help. I do everything myself because I don't trust most mechanics, especially after what I have seen from some of those who have asked for my help. As for Bourbon, I love Buffalo Trace, Woodford Reserve... there are so many good bourbons!
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I am no mechanic, but having this ride is turning me into a pro. thanks for the vid. Lifesaver.
Hi Andre, this car will make you a pro! Some of the activities are a little more difficult than normal. But doable! Glad my video helped. Please subscribe!
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What a refreshing auto repair video! I'm 71...my dad raised 5 kids as a mechanic...first...I salute and join you in your "appreciation " of auto engineers"... I've made a point of owning pickups no newer than 1985...confident I could fix anything that went wrong. I started having kids who, as they "grew up" wanted cars that held current staus with their friends. I warned them if they bought vehicles that, when the hood was raised, looked like a drunk plumber built it I would be unavailable for repairs. Of course my first 4 kids are girls/women so I tried to keep up as much as possible but as my colorful language grew in creativity and volume I realized why my mom tried to keep us kids away from the shop area when my dad was working on a friend's vehicle on his weekends away from his job in a shop.for whatever brainfart reason I recently acquired a 98 de Ville... your video on the cooling system kept me from parking my "caddy" in the deepest canyon of "hell" . And your "calm " ironic personality kept my cooling system from driving me over "the edge ", whatever that is...so I'm having a shot or two of Hornitos and diving in more relaxed and accepting of just another job. I'm subscribing and recommending your videos.. and there will be a 98 de Ville for sale soon.
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Thanks very much Bob, I think that was my best ever comment. Most of the videos I make are about my 2002 F150. I am not interested in a new vehicle with all the unneeded bells and whistles, the complexity and now more quality problems than of past... so I make my vehicles more comfortable, efficient and powerful. Last vehicle I bought was in 2010! A 2006 Cadillac. I appreciate you for passing my channel along to others and let me know how the Deville Repair goes... to be honest, I loved that car (my mom's), but maybe you saw it has been wrecked and now the squirrels ate the wiring harness! czcams.com/video/4XMF3WxGjJg/video.html
Love your content. Thanks!
very welcome!
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Thanks very very much... I appreciate you...
So I just bought a 97 Cadillac DeVille d'elegance, I'm overheating because she is overheating, I replaced the thermostat, I've already replaced my alternator, but I am getting ready to replace my reservoir. Ugh. But ty for this video. You helped a lot. Next imma have to fix the air hose for the car leveler? Something like that. I'm dragging and riding low. I'm gonna look to see if you have any videos on that. Thanks again buddy.
Make sure you check that return line to the reservoir. That’s the biggest cause of overheat with these engines. I showed in my video… also, check out this video: Overview of Cadillac / GM Electronic Level Control System - Deville Series Part 13
czcams.com/video/jSEWSeHufKY/video.html
I have a 03 deville with an overheating problem a weird heater problem where the driver side gets hot but the passenger side doesn't and I'm clearly not getting cool and all the way through the system because my top hose has very little water in it and stays squishy and never gets hard so the previous odor replaced the water pump I've replaced the thermostat I've checked the top middle line for blockage but the coolant was kind of nasty so I'm now flushing they got for your video that show the location of the pecock because I could not find it. But when you flush do you close the pecock or leave it open? Do you recommend a separate heater core flush also? I have heard that flushing the whole system can lodge particles in the core and cause problems with heater core blockage?
In my opinion, a power flush that pushes the fluid through the entire system could plug the heater core unless flushed in the opposite direction. If you're getting heat in the passenger compartment, but only on one side you might have a blend door problem. Do you have dual climate controls? There will be 2 blend doors, one for the passenger side and one for the driver side. If you are adjusting the temperature at the panel, and only getting temperature changes on one side of the vehicle, it could be the blend door actuator. You'll need to test for operation.
How much did you charge for that work? I just bought a 1997 10700 miles, bought it for 500! But it overheats! still would like to fix it! Love this car
They are great cars. That was a bit expensive to replace the radiator, coolant tank, thermostat, hoses and associated labor. I would be sure to understand where your overheating problem is coming from. Is your radiator full? Do you see any coolant leaks? In my video, I point out that one line that crosses the intake that many have had problems with plugging. Check that first with a cool engine. Also, get the thermostat I suggest that is a fail to open device. Good protection. Let me know what you find. You can also reach me on my Facebook Page: Driving Intelligence
@@DrivingIntelligence Hey I have an 1995 Cadillac Seville sls . I have my coolant leaking all out from the bottom of the car near passenger side . Idk what it could be
@@reesogotti5059 could be leaking from radiator
Can you do the same procedure with a 99 Oldsmobile Aurora??
The procedures are generally the same for all engines when flushing the system. Do you have a specific problem?
Going to see if any of this will help my 98 STS. Off road since November, took it out yesterday, and no problems until I put the AC on (don't need it much in my country tbh), and it started belching steam from under the hood. Heard some ominous bubbling from around the head are, and lost majority of water from the expansion tank through the plastic lid
Did the overheating start instantaneously when you turned on the AC? Are you sure your electric radiator fans are turning on with the AC?
@@DrivingIntelligence Thanks for getting back. That seems to have been what happened. Although the fans turn manually to the touch, didn't hear them running. Had taken the Cadillac onto the motorway, got to my house - no problems. Took it a short distance to pick up son, switched cold air on and next thing I notice steam appears.
@@iainmorrison4606 slower driving increases engine heat, especially with AC on.
@@DrivingIntelligence thanks. Just tested the thermostat - working, so think a combination of putting the AC on and the fans not working (thankfully in Scotland we usually only get a couple of days of hot weather!)
@@iainmorrison4606 yeah, those fans are absolutely important to cooler running. Check the fuses and relays?
I installed a new surge tank but can not figure out how to get the clamp back on to the resvoir? On my 1999 cadillac eldorado. Thank you for any help.
Hi Sheila, what is a “clap”
Sorry I meant the clamp/slash strap that goes around the ac accumulator
@@sheilacoleman4134 sorry for delay getting back to you. Did you figure it out? I started a video showing this process and could release in a couple days.
Thank you for getting back to me, and no did not get it back on yet. Oh I would appreciate a video on how to do this. This was originally my Dads pride and joy. He passed away in December and we brought his cadillac to our house. So we want to keep it in the best shape we can as he did.
@sheilacoleman4134 sorry for your loss. I’ll work on that video this week. And let me know if you have other needs for your Cadillac. What year and model?
Did this solve the overheating issue?
This Deville was not overheating... the coolant return tube is normally the overheating issue.
So I read another guys post where he losing antifreeze on the middle bottom of the car and he said the fix was a bad thermostat. Now if the thermostat is near the air filter, why would antidreeze be leaking from the bottom. I just floored it because of poor engine performance due to bad coils and then I saw the car was overheating and when I looked on the bottom of the car it was leaking coolant.
sad thing is leaks can start in one place and show up somewhere else. You will need to let the car get very hot as I did in my video and inspect for leaks. If your car is overheating, check the return line at the top of the engine as I mentioned in the video. Could be plugged. An overheat is going to create a leak given the higher pressures in the cooling system.
@@DrivingIntelligence Thank you. The coolant or water, seems to go right through the coolant thingy. I only drive short distances because I’m so afraid of it breaking down
@@jesusjessegonzalez191 wish I can help! Have you found the location of the leak?
Head gasket
I have a Cadillac DeVille I change my water pump and it is still leaking water when I went to put water in the reservoir it started coming out I hadn't caught the car up at all because my battery is dead do you think maybe I need to charge my battery and see if I still have a leak really need your help
I am sure you still have a leak, you will need to start the car and carefully search for the leak. You can send photos of your issue to my Facebook Page to get some additional help: facebook.com/drivingintelligence
Is it. Ok to put water in the reservoir?
My 97 leak right there the mechanic said I need new box lord
leak at the coolant tank or the radiator?
What mm nut does it take it off
Sorry, I don’t understand your question.
I have a 99 Deville I can never open the radiator cap what am I doing wrong
You can’t open the radiator cap when the engine is cold? Normally, you just push down and twist counterclockwise.
The cap will not open when I turn it I have no idea if I'm just not pressing enough if I'm old LOL or what @@DrivingIntelligence
You might have a faulty cap, but it takes a lot of pressure. And don’t open when hot!
Really thank you for educating me on this car I have a 98 Eldorado it's only got 78,000 Mi on it Elder gentlemen bought it what's 10,000 MI and it's mine now say beautiful car and I want to get a 150,000 out of this motor how do you replace the thermostat change the oil new plugs new filter new coolant I unhook the purge line and blew it out with my hose and fluid was coming out of the the reservoir so that told me right there that I didn't have any blockages so I'm good with that haven't had any trouble with it heating up I'm just it's just me I'm going to go through it and do what I think it needs to be done radiator looks good fans come on good I will probably have to replace the top hose pulled everything off the top blew everything out pull the engine cover off the top some squirrels left their acorns underneath there so I got all that clean beautiful car love it I just want to take care of it thanks for your input can you educated me on this finicky Beast
Thanks for your comment. I love these cars and the Northstar Engine. Check out this Playlist and let me know if you have any other needs: czcams.com/play/PLGNsbVXzRfZOZLzjeTGQyLUsFDPYwttq4.html&si=Th7dKepGevsSWcRt
Question the brackets holding the radiator to the condenesor wtf bro is the trick
Hi Danny, are you talking about the one bracket on the side of the radiator that holds the refrigerant lines in place? Or are you talking about the condenser brackets at the bottom of the condenser? Any way you can send me a photo to my Facebook Page? www.FaceBook.com/DrivingIntelligence/ Thanks!
I can't get mines back on tight
Have a 92 with now overheat, non northstar but already saw incompetant mechanic..
Sorry to hear that. What’s your plan to get it resolved?
Have a 99 cadi devile its leaking in the middle under neath the car
Thanks for reaching out. Have you put the car on ramps and looked for the leak?
No I haven’t not its leaking un the frame close to the driver seat having to put antifreeze in it 3 to 4 days
@@jacobattaway7582 I really can't help you without more information. The coolant can leak from one location and show up in another location. Look closely at the area around the throttle body to see if the cross over tube is leaking,. Take the engine cover off first.
Ill try tht when i get of work
Excellent, let me know
I need help too
keep the questions coming...
Fixing my DeVille it overheats. the coolant reservoir is always full.the tubes running to the radiator feel empty. idk what it is
Did you check the tube going over the engine and returning to the reservoir to make sure it's clear?
@@DrivingIntelligence yes I flushed those lines but the coolant is still stuck in the reservoir and won't circulate is it a water pump or clogged line under the reservoir?
@@MoSJuve777 have you checked the water pump belt? Is the water pump in good order? How about the thermostat?
@@DrivingIntelligence I changed the thermostat and the water pump belt spins but I haven't really looked at it
@@MoSJuve777 maybe a silly question, but did you install the thermostat in the correct direction? :) Also, are you sure you don't have a head-gasket problem?
My 94 Eldorado with only 36k miles on it just started overheating I'm so disappointed
have you checked the coolant return line?
@DrivingIntelligence I'm going to check that today this is the 3rd Northstar I have owned and I can't believe this one has Is already overheating
Let me know what you find
Your motorad video is marked private. Can you make it public?
good morning, it shows as Public on my account. You aren't able to watch the video?
@@DrivingIntelligence Correct. Tells me it is private
@@DrivingIntelligence No longer listed as private. Thank you
@@robertmontgomery7158 excellent, thanks!
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Sometimes gotta have a drink!