New Radiator - what else to change out with it?
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2004-2007 Cadillac CTS-V General Discussion Discussion, New Radiator - what else to change out with it? in Cadillac CTS-V Series Forum - 2004 - 2007; I was greeted with some unwelcome news when I got home from work last night. Looks like I'm going to ...
  1. #1
    JazMiller is offline Cadillac Owners Member
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    New Radiator - what else to change out with it?

    I was greeted with some unwelcome news when I got home from work last night. Looks like I'm going to be putting in a new rad.

    I'm kinda hoping that Alradco is putting a memorial day sale together .... :-)

    So I figured I'd ask the forum, ... besides some new rivets for the lower plastic cover, replacement belts for AC and main serpentine, and a new thermostat, what else is common to fail or what other replacement/upgrades should I be planning for while the rad is out?
    (I'm stock under the hood)

    Cheers,

    Jason

    rad leak.jpg

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  3. #2
    darkman's Avatar
    darkman is offline Cadillac Owners Master
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    Re: New Radiator - what else to change out with it?

    Consider new radiator hoses and belt tensioner depending their ages/mileage.

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    JazMiller is offline Cadillac Owners Member
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    Re: New Radiator - what else to change out with it?

    Thx for that tip, I'll have a look at the tensioner. I was going to inspect the hoses, but unless something was wrong I wasn't planning on changing. I wouldn't think at my mileage I would need to replace any of these, but I guess I also would think this is a premature failure in the rad too.

    31,000 miles on the odo on my 05.

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    darkman's Avatar
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    Re: New Radiator - what else to change out with it?

    At 31k the belt tensioner is probably okay. The hoses, on the other hand, deteriorate with the passage of time as well as mileage.

  6. #5
    heavymetals's Avatar
    heavymetals is offline Cadillac Owners Master
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    Re: New Radiator - what else to change out with it?

    Replace the hoses to.

    One hose is $150!

    YEOW!

    If you do the ALRADCO, it is a work of art.

    I have a maggie and I think I would have had a lot easier time of it if I had just removed the front clip.

    The intercooler hindered installation.

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    JazMiller is offline Cadillac Owners Member
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    Re: New Radiator - what else to change out with it?

    Holy carp, I wasn't expecting to see those hose prices at gmpartsdirect. Good thing I was sitting down cause I would have fallen over!

    Placed my Alradco order. For anyone on the fence, I was pleasantly surprised that Alradco is running a Memorial Day sale that just started today, which offset my shipping and RMI-25.

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    HAMSTAR is offline Cadillac Owners Enthusiast
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    Re: New Radiator - what else to change out with it?

    If you haven't yet, get your motor mounts done. My guess is bad motor mounts is the reason the OEM rads fail so often.

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    Re: New Radiator - what else to change out with it?

    I was also shocked at the price of OEM radiator hoses, but was able to cross reference the part numbers and find that Gates makes hoses to fit the V, that you can snag online for $40:

    Gates 23030 (Upper) $37 @ O'Reilly, $15.54 @ Amazon and $20.79 from RockAuto.com
    http://www.oreillyauto.com/site/c/de...=radiator+hose

    Gates 23031 (Lower) $33 @ O'Reilly, $18 @ Amazon and $10.47 from RockAuto.com
    http://www.oreillyauto.com/site/c/de...=radiator+hose

    The dealership replaced mine under warranty so I didn't order or test that these fit, but they are a heck of a lot less expensive than the OEMs.

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    JazMiller is offline Cadillac Owners Member
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    Re: New Radiator - what else to change out with it?

    Quote Originally Posted by HAMSTAR View Post
    If you haven't yet, get your motor mounts done. My guess is bad motor mounts is the reason the OEM rads fail so often.
    Interesting idea. I've been putting off mounts for about a year. I have a set of Creative Steel mounts that I've moved from one side of the garage to the other a few times while doing other little things on the car instead of the bigger items like mounts. I'm working my way up the DIY ladder slowly to get there...

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    darkman's Avatar
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    Re: New Radiator - what else to change out with it?

    Quote Originally Posted by HAMSTAR View Post
    If you haven't yet, get your motor mounts done. My guess is bad motor mounts is the reason the OEM rads fail so often.
    How?

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    HAMSTAR is offline Cadillac Owners Enthusiast
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    Re: New Radiator - what else to change out with it?

    Quote Originally Posted by darkman View Post
    How?
    Motor moving around will yank on stiff hoses connected to inevitably brittle plastic fittings on OEM rad. Why so many failures are to the hose fittings.

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    robojesus is offline Banned
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    Re: New Radiator - what else to change out with it?

    HAMSTAR, not going to lie, when I read that post, I immediately thought "wow, that may just be the most retarded thing I've ever heard", then a few seconds later I thought, if the motor is sagging down and pulling on the cooling hose going to the top of the tank, then absolutely, that could cause the tank to eventually crack from stress. I like the way you think.
    HAMSTAR and HAMSTAR like this.

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    HAMSTAR is offline Cadillac Owners Enthusiast
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    Re: New Radiator - what else to change out with it?

    Quote Originally Posted by robojesus View Post
    HAMSTAR, not going to lie, when I read that post, I immediately thought "wow, that may just be the most retarded thing I've ever heard", then a few seconds later I thought, if the motor is sagging down and pulling on the cooling hose going to the top of the tank, then absolutely, that could cause the tank to eventually crack from stress. I like the way you think.
    Um, thanks, lol. Being a scientist, I tend to look at whole systems. I have to admit it was Fuzzy that first introduced the idea my shitty motor mounts (before I went to UMIs) were responsible for a whole slew of accessories that failed all around the same time.

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    darkman's Avatar
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    Re: New Radiator - what else to change out with it?

    Quote Originally Posted by HAMSTAR View Post
    Motor moving around will yank on stiff hoses connected to inevitably brittle plastic fittings on OEM rad. Why so many failures are to the hose fittings.
    The original radiators suffered from a poor crimp (metal on metal) at the bottom tank, which would leak under pressure by the high rpm operation of LS motor. The replacement design cured the lower tank crimp but introduced a new problem on the upper tank crimp. I have not seen, the second design but, I do not recall the original design (which I replaced) as having any plastic fittings related to the main upper or lower hoses. It did have, a plastic T-fitting which interconnected the rubber hose to the under hood overflow tank to the rubber hose running to the engine steam vents. The T-fitting can become brittle over time due to heat exposure, but is not particularly vulnerable to a variation in engine position. Finally, the upper and lower radiator hoses are designed to accommodate a significant variation in engine position without tension. The bottom line is that I haven't seen any evidence connecting the radiator problems with engine movement.

  16. #15
    HAMSTAR is offline Cadillac Owners Enthusiast
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    Re: New Radiator - what else to change out with it?

    On my original OEM radiator, the place where the top hose and bottom hose connected were both plastic.

    The only way to ever really get evidence is to compare the failure rate between those with and without bad mounts.

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