2005 Astro Overheating

2005 Astro Overheating

Postby bradyalderin [OP] » September 27th 2020, 9:54pm

I have tried and tried searching for the answer to this question but couldn't find it. I am sure this has been asked before and if someone has a link to the answer that would be amazing. However I just bout a 2005 Astro AWD drove it for 2 days (couple hundred miles) with no issues. Just yesterday it started to over heat. I see that Intake manifold gasket is a huge issue with these things, but not sure if it is for the 2005? If so how do I check to see if it is the intake manifold gasket? I can't seem to find any leaks around it. I did have a coolant leak but I believe that was because I over filled the coolant overflow tank. There is coolant in the radiator and its full, but also full of sludge, so I know I need to flush it as well. I am an absolute newb to Astros. Thanks for any help!
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Re: 2005 Astro Overheating

Postby sixsix » September 27th 2020, 11:06pm

bradyalderin wrote: ... Just yesterday it started to over heat.


Were you going by the gauge or was there some real undisclosed problem ?

Suggest a good steam or wash down and dry, then check weep holes in water pump and back of engine.
Yes, 2nd Gen Astros and Safaris have some hi mileage intake manifold issues. Hope that's not your situation.
.

Well, after all... what would Banacek say ?... “Everything needs to change except the asshole culture and stupid way of life of the avg. antifa, BLM follower - slobs, cowards, killers w/o any thought that they, IN FACT, are now the Racists.”

.
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Re: 2005 Astro Overheating

Postby bradyalderin [OP] » September 27th 2020, 11:43pm

Just going by the gauges and a light came on and told me to check gauges. It has 138000 miles. I attached a picture of the radiator cap
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Re: 2005 Astro Overheating

Postby Birdshake » September 28th 2020, 12:25am

You said you might have over filled the system. Did you put the the green coolant in?
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Re: 2005 Astro Overheating

Postby bradyalderin [OP] » September 28th 2020, 12:33am

I did. It’s all I had and my only vehicle. Is that bad ? Can I just flush the system? I just drove back from work and it didn’t over heat. When I drove to work this morning the gauges were pegged indicating it overheated but back home it didn’t even come close. I also tried using the heater and it did not work.
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Re: 2005 Astro Overheating

Postby Birdshake » September 28th 2020, 12:45am

These vans use Dex-cool which is orange. Mixing the green with the orange is a no go. It will cause the van to over heat. A full system flush is needed.
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Re: 2005 Astro Overheating

Postby bradyalderin [OP] » September 28th 2020, 1:19am

Ok thank you for that information I had no idea ! I feel really dumb now! However it did also over heat before I put it in because I only put some in because it overheated
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Re: 2005 Astro Overheating

Postby Leeann_93 » September 28th 2020, 10:55pm

At the very least, you need to flush the cooling system. Drain the radiator, drain the block as much as you can, drain the heater core. Refill with flush stuff and water and run for a while, then drain and rinse. Replace the thermostat, replace the upper and lower radiator hoses if they don't look new and replace the lower intake manifold gaskets with the Fel-Pro set that ends in T - that's the plastic-coated metal set that lasts longer than the OEM-style gaskets.

When you have reassembled everything except the thermostat and upper radiator hose, fill the block through the thermostat hole, then install the t-stat, housing and upper hose. Fill the radiator. Now get the passenger front side up as high as you can and do several heat/cool cycles to burp out air - it will take a few because the rad cap is not the highest point in the system.
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Re: 2005 Astro Overheating

Postby AstroWill » September 29th 2020, 2:49am

Leeann_93 wrote:replace the lower intake manifold gaskets with the Fel-Pro set that ends in T - that's the plastic-coated metal set that lasts longer than the OEM-style gaskets.

x2, these guys https://amzn.to/32UGVqM
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Re: 2005 Astro Overheating

Postby MechBob » September 29th 2020, 3:55am

Dexcool has been compatible with most other coolants for over 10 years.But not bottom of the line "green".It is compatible with all "universal" coolants.Anyway,that looks like rust to me,which did not just happen.If you plan on keeping van,I would recommend flushing radiator,heater core and block.Time consuming and messy.If you cannot,there are other options.BTY,the biggest thing about dexcool was it was supposed to be long lasting,and organic,earth friendly.The biggest drawback of dexcool-it attacked the plastic and rubber gaskets,and even some GM head gaskets,from Cadillac on down.
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Re: 2005 Astro Overheating

Postby markmitch » September 29th 2020, 5:12am

My suggestion, and I am doing this to my wife's 2003 Astro AWD. Drain the radiator, take a gallon jug add 1 cup of cascade dish washer powder fill with warm semi hot water. sake it till the powder is mixed in the water add to the radiator fill with water. start the engine let it run for approx 40 minutes with heat on hi if you have rear heat turn that on too. Shut her down and let her cool. drain it again including the block etc. then I use a T in the 3/4 inch hose to attach a water hose. Open the petcock on the radiator and if there is on on the block open that too. turn the hose on start the engine turn the heater/s on again and let it flush. Shut it down again drain as much as possible then close it and refill it with coolant/water mix. This is an old truckers trick to clean the coolant system. I have done it many times over the years and never had a problem. It will clean sludge, oil, rust pretty much anything.
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Re: 2005 Astro Overheating

Postby bradyalderin [OP] » September 30th 2020, 1:52am

Thanks for all the suggestions. Today I completely flushed the entire system 7 times. Removing all hoses including the ones on the heating matrix and forced water through them. I even disassembled the overflow and scrub the inside of it. I did use a couple jugs of radiator flush (forget the name) and flushed the system multiple times. Took me about 10 hours all together between running the vehicle and cleaning. The coolant was almost black when I first started and then when I finished it was almost clear. Not perfectly clear but I figured I would run it for a couple thousand miles and flush again. I also replaced the radiator cap. I was going to replace the thermostat but honestly couldn’t break the bolts loose. Next time I flush I will replace it as I did already buy one. I finally have front and rear heat and it hasn’t come close to overheating. Maybe someone already replaced the LIM gasket because I don’t believe that was the issue at all. I believe it was blockage from the rust or whatever the build up was. So far so good and I owe it all to you guys for helping me out. I was about to ditch her because I was frustrated. Thanks for all the help !
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Re: 2005 Astro Overheating

Postby Rockridge » September 30th 2020, 2:12am

Nice save.
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Re: 2005 Astro Overheating

Postby Birdshake » September 30th 2020, 3:06am

:rockon: Good job dude.
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Re: 2005 Astro Overheating

Postby bradyalderin [OP] » September 30th 2020, 1:53pm

This is my new to me Astro I bought for 1200. First ever Astro. Sold my 2015 Tacoma and bought this. Once again thanks for all the help.
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Re: 2005 Astro Overheating

Postby Leeann_93 » September 30th 2020, 9:59pm

Damn - that's a really good price for a van that looks that good.
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Re: 2005 Astro Overheating

Postby AstroWill » October 1st 2020, 4:53pm

Yeah it is, that is a great price for such a nice looking van.
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Re: 2005 Astro Overheating

Postby bradyalderin [OP] » October 1st 2020, 6:56pm

Thanks, it use to be used for a small airport in my area. Just rolled over 140,000 miles.
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