Last post on Jul 16, 2013 at 4:58 PM
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Chevrolet Blazer, GMC Jimmy, SUV
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#756 of 3676 Engine Coolant
Jul 07, 2003 (8:19 am)
I recently purchased a 1999 Chevy Blazer LT. It has 59,xxx miles. The other day I changed the coolant, and noticed that the coolant in the overflow reservoir had sludge in it. I proceeded and even took the reservoir off and cleaned it the best I could.
Today I was checking level, and it still has some sludgy junk (not much) floating around in reservoir. I was just hoping someone could tell me what this is and why it's there. I've not seen anything like this before.
Any help would be appreciated.
#757 of 3676 Engine Coolant
Jul 07, 2003 (9:32 am)
You should flush the entire system. There is a known problem with the DexCool in this application. The iron from the engine and air mix with DexCool to form sludge. The coolant needs to be full (even overfull) at all times to prevent air in the system.
The door pins need to be greased at every oil change or they will fail too. I think water from the windshield runs directly on the door pins and washes away the grease. I had to have the drivers side upper hinge replaced at 30k miles at GMs expense. I keep them well greased now.
I filled every inside panel with foam to prevent rattles. I think this is one of the worst cars I ever purchased. I am not sure what GM was thinking when they made these POS. Every time I hear GM market share goes down I laugh. It seems GMs poor engineering is catching up with them.
#758 of 3676 RE: Interior Noises
Jul 07, 2003 (4:59 pm)
I have a few questions after reading all these posts. Hopefully someone can help!! I have 2000 Jimmy 4dr with 80000 KM.
1) First of all, abc246 - What kind of foam did you use and do the door panels just pop off? Also, is there a special way to "grease" the door hinges or just plain old WD40? Any other suggestions for interior door noises?
2) I have now started to hear the famous gurgling from the dash. I have had the radiator flushed at Canadian Tire but the gurgling is still there. I have lots of heat and the temp gauge is under 100. In a previous post, a member said that he flushed the heater core with a garden hose. How do you do that? Someone else said that they flushed out the hose from the resevoir tank. Whats involved with that?
3) In some other posts, it was said that the radiator cap should be replaced to prevent air from being sucked in. Any certain kind? Were year 2000s affected?
4) Totally off topic...anybody have any views on products like Duralube or Z-Max?
Besides the interior creaks and the new gurgling noise, everything so far has been fine. Is there anything I should be checking now or changing (fluids, plugs, etc) that could save me some headaches in the future?
Sorry so long!! Thanks in advance!!
Jul 08, 2003 (12:28 am)
I have a 1997 Blazer with Dexcool antifreeze. I pay my dealer to flush it every 2 years. I started doing this the 1st time I saw globs of orange stuff under my radiator cap. So far no problems for me except for running warmer than normal in 95+ degree weather, but lots of folks have had to replace clogged heater cores. Forget about the supposed coolant life of 150,000. You'll never see it unless you drive 75,000 miles a year.
#760 of 3676 Engine Coolant
Jul 08, 2003 (3:48 am)
There is a recommended replacement cap. I don't have the Stant P/N, but I posted it before. The replacement cap has a spring on the coolant return valve to keep it closed.
For oil on the door pins I use (and go overboard) 90W gear oil and then grease to keep the oil on the pins.
As far as the foam, I used triple expanding Tuff Stuff Foam. You can get it at places like Home Depot. With this foam it is almost impossible to remove a panel, so be careful. I used it in all door panels and behind all cargo panels including the tailgate. It is Lexus like now!
#761 of 3676 1997 Blazer shudder
Jul 10, 2003 (10:25 am)
I've read a few posts here about front end shudder on various years of Blazers. I've also read how tons of loot have lined the pockets of our favorite mechanic who just can't seem to get it fixed. The one thing I haven't read is a fix for this problem.
My 97 Blazer (70K miles) shudders at about 30MPH and again at about 65MPH. The wheel doesn't shake, as if the rotors were bent; the body just seems to vibrate a bit at those speeds. It needed an alignment anyway...got one...but it didn't fix the problem one bit. I probably need new shocks, but I can't believe that shocks would be the culprit here. I suspect a hub replacement is in my near future but wanted to get some feedback before I turn down "expensive highway".
Any words of wisdom out there?
#762 of 3676 Oil Line...Front end clunk
Jul 10, 2003 (2:52 pm)
I wish I had read this just a couple months ago. Last year we bought a '95 Blazer, I loved it, I've wanted one for years. 9 months after we bought it I was driving in to work with my wife (Yellowhead rush hour just East of Edmonton), it was foggy out, and I look into the rear-view mirror and think, "Hey that's kind of neat, look at the way the fog is swirling around the back of the truck! Wait a sec, fog doesn't usually swirl..." I glance down and see the engine light has come on. Look around, Oil Pressure ZERO. Thankfully we were still outside the city, I pulled to the side and shut the truck off and coasted to a stop. Hose to the remote oil filter blew, oil sprayed all over the engine bay. Glad I had just put synthetic in, I think it saved my engine that day, gave enough extra lubrication that it was able to run with no pressure like that.
Also, I noticed when looking at my ball joints that my upper control arm on the driver's side was banged up, and I heard that thumping from that wheel well, but only when I turned the wheel all the way to the left in a tight turn. I figured out it was the wheel balancing weights on the inside of the rim catching. The tolerances are just a little too tight for a 15" rim when it is turned all the way. I wonder if that is why a lot of the newer ones seem to sport 16 or 17's. Oh well.
#763 of 3676 please take a few minutes
Jul 10, 2003 (6:14 pm)
to read this entire thread if you have questions, as some of us have gone to great detail to explain and report various problems on these vehicles. please don't ask us to type things over and over if you haven't even read the stuff that's already here. You are bound to find much of your questions answered already, or at least the similar questions posed.
Jul 10, 2003 (6:30 pm)
The Discussion Search tool can ferret a lot of answers out too.
#765 of 3676 Blazer problems
Jul 11, 2003 (5:56 am)
Posts 763/764 address searching in the database for answers to our problems. I've read SEVERAL topics on my front-end shudder problem, but the entries seem to die off after taking the car to the dealer, or the author promises to post what the dealer/favorite mechanic finds in a few days. The majority of posts simply vent frustration over what appears to be a strange anomoly within Blazer suspension/steering system and outline a plethora of parts replaced at enormous cost.
...or maybe it's just my sluething skills....