Help, Just removed Radiator coolant resovoir 2004 sls
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Northstar Engines and System Technical Discussion Discussion, Help, Just removed Radiator coolant resovoir 2004 sls in Cadillac Engine Technical Discussion; I have had a leak in my cooling system and have had to top off daily. It got to point ...
  1. #1
    Hollywood's Avatar
    Hollywood is offline Cadillac Owners Member
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    Help, Just removed Radiator coolant resovoir 2004 sls

    I have had a leak in my cooling system and have had to top off daily. It got to point now the vehicle overheats and that's that. I pulled apart what I could and found that the bottom of the resovit tank has what appears like a starburst design crack, I ran water in it and it began to leak. Would this cause extreme coolant loss and overheating? I am looking around but it has been snow and rain here and I do not have a garage to dry it all out. NAPA does not carry the part but said maybe I can repair it. It is on the bottom.

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    dkozloski's Avatar
    dkozloski is offline Cadillac Owners 10000+ Posts
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    Re: Help, Just removed Radiator coolant resovoir 2004 sls

    Quote Originally Posted by Hollywood View Post
    I have had a leak in my cooling system and have had to top off daily. It got to point now the vehicle overheats and that's that. I pulled apart what I could and found that the bottom of the resovit tank has what appears like a starburst design crack, I ran water in it and it began to leak. Would this cause extreme coolant loss and overheating? I am looking around but it has been snow and rain here and I do not have a garage to dry it all out. NAPA does not carry the part but said maybe I can repair it. It is on the bottom.
    I don't think you're going to find anything that will glue the tank and stay stuck. I'd be looking for somebody that welds plastic storage tanks. Outfits around here that make plastic septic tanks and water storage tanks also provide welding services as their tanks are ungluable also.
    Don't mess with Binky Bear!


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    Submariner409 is offline If it won't run, stick on fender vents
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    Re: Help, Just removed Radiator coolant resovoir 2004 sls

    Coolant actually circulates through the expansion tank in order to allow air/gas bubbles to pass out of the coolant and collect in the tank. Look at the cap, read the system cap pressure, and you'll know why a LOT of coolant can come out of a small hole at 16-18 psi...

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    Re: Help, Just removed Radiator coolant resovoir 2004 sls

    Being a dealer only part I'm told, I went to NAPA and picked up the repair kit to try a temp fix til I can get the part. Ya clean, sand, prep, then epoxy, then fiberglass belt, then epoxy again, then let harden. If coolant is always circulate in there then thats probably it. It will brely drip when filled but thats with no pressure.


    Is it safe to fill with water to test, then drain and fill properly? I haven't looked for the drain plug yet but thought I read pass side bottom.

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    Re: Help, Just removed Radiator coolant resovoir 2004 sls

    Sure it is safe to test it that way, but remember, it will not be under pressure and that can make the difference. What you are using may work. I would think JB Weld may as well. Worked for me on the purge line nipple. If you replace the part, try http://www.gmotors.com

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    Re: Help, Just removed Radiator coolant resovoir 2004 sls

    New issue. Water pump belt was also broken, the root of the overheat I am sure but not the leak.

    Problem: Both pulleys are fried, no one had them, must be a dealer part. The pulley on the tensioner looks like a metric bolt but how to remove the other?

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    Replace water pump pulleys and belt (New prob)

    I had a coolant leak, found it, then saw water pump belt was broken, both pulleys melted up and appear fried. Can't find 'em but will call dealer tommorow.

    Problem: I don't know how to remove the pulleys. The one on the tensioner appears just to be a metric bolt, the one on top of the engine I have no clue. Please advise on that & the easiest way to get the belt on.

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    99cadillacman is offline Cadillac Owners Member
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    Re: Replace water pump pulleys and belt (New prob)

    hi.... the tensioner pulley is usually serviced only with the whole tensioner assy. Even if you could replace just the pulley i would reccomend replacing the whole tensioner assy if you car has more than 80k miles...Its held on with two 10mm head studhead bolts. The big pulley on top on the end of the camshaft is pressed on. It can be removed and installed with a power steering pulley remover/installer. There are several companies that make a version of the tool. you also may be able to rent one at a local parts store. as far as the belt goes if can be removed installed easily. you have to remove that sheet metal cover by taking two 10mm head nuts off the bottom and removing one 10mm head bolt on top.

    If you cant locate the parts let me know. I am in the process of installing a northstar engine right now. I could sell you a used cam pulley and a used tensioner+pulley assy....

    also make sure the water pump pulley moves easily... if you cant turn it then it is locked up and must be replaced as well... im sure if you search this site there is probhably info about this all over...
    mike

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    Re: Help, Just removed Radiator coolant resovoir 2004 sls

    What other pulley? One is on the tensioner, one is on the pump and the drive pulley is attached to the intake cam.

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    Re: Replace water pump pulleys and belt (New prob)

    Please email me at hollywood@wideopenwest.com re the used parts. I cannot PM until 50 posts. Thanks

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    Re: Help, Just removed Radiator coolant resovoir 2004 sls

    the cam pulley and pump pulley. Changing the cam pulley is sounding rough for a broke super part time mech like me. When the belt broke it was stuck and melted the pulleys up. I am very tempted to put the belt on on see if it stays. I can't even see how to loop the belt on.....

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    Re: Replace water pump pulleys and belt (New prob)

    The belt melted the pulleys but with as difficult as this sounds and the bucks and tempted to see if the belt will hold but I cant tell how to loop it on...help describe please

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    Re: Help, Just removed Radiator coolant resovoir 2004 sls

    You just need a P/S pump puller/installer. I would bet if it was melted, it will through the belt and you can be sure that will happen at the most inopportune time and place.

    Moving the tensioner might give you the clearance you need or replace the belt when the tensioner is being replaced.

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    Re: Replace water pump pulleys and belt (New prob)

    I am going to merge these two threads together.

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    Re: Help, Just removed Radiator coolant resovoir 2004 sls

    Quote Originally Posted by Ranger View Post
    What other pulley? One is on the tensioner, one is on the pump and the drive pulley is attached to the intake cam.
    Glad you posted that, I haven't looked since it got dark but I only saw 2 pulleys but the 3 makes function sense to me, I didn't see the actual pump pulley, now I wonder if it's there still. I saw on a site that Auto Zone will lend out a pulley puller removal tool with a 100% refundable deposit, ever heard of that?

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