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-   -   N* coolent change, sealer still needed? (https://www.cadillacforum.com/forum/general-tech-7/n%2A-coolent-change-sealer-still-needed-10047/)

rcadblue4 11-04-2009 10:57 AM

N* coolent change, sealer still needed?
 
Hi All, Just a quick question about the sealer tablets the older N*'s needed when doing a coolent service. Did they ever fix the issue on the later N*'s? Would an 03 or 06 need them still? Just curious.

thanks
Rcad

slowroll 11-04-2009 10:45 PM

GM recommends to add the coolant cookies any time coolant is drained. The cookies are supposed to seal minor leaks and lubricate water pump so as to extend its service life. Cookies are NOT TO BE ADDED TO DIESEL COOLING SYSTEM, because they could shorten the service life of water pump. There is a TSB about it. All gasoline engines should have 2 tabs added except Cadillac 4100, 4.5l, and 4.9l which should have 6 tabs (because of its unique construction).

99STSGUY 11-04-2009 11:37 PM

So far a N* does that mean add only 2? or do we use all six on the 4.6 motor?

stomper 11-05-2009 12:42 AM


Originally Posted by 99STSGUY (Post 35382)
So far a N* does that mean add only 2? or do we use all six on the 4.6 motor?


as I understand it, all Northstars, all sizes, two tablets ...
4100, 4500, 4900 are not N*'s ... 4600 is of the N* family ...

99STSGUY 11-05-2009 06:26 AM

I have some coming in, will be sure to add two.

stomper 11-05-2009 08:24 AM


Originally Posted by 99STSGUY (Post 35387)
I have some coming in, will be sure to add two.



???

i get mine at Big-Lots or Walrmart ... the last time? last summer.
i get the tube granule form instead of the tablet form.

from the FAQ section

https://www.cadillacforum.com/forum/...ead.php?t=2488


.

rcadblue4 11-05-2009 08:44 AM

Thanks for the info. I used the tablets in my 00 DeVille. If I remember right I add them at the lower rad hose...correct?
My 04 is due for a coolent flush and change, I'll add the tabs again.

Rcad

majbarron 11-09-2009 06:33 AM

Does it matter where you install the tablets, especially if you definetly have a head gasket leaking.

stomper 11-09-2009 08:07 AM


Originally Posted by majbarron (Post 35462)
Does it matter where you install the tablets, especially if you definitely have a head gasket leaking.


depends on the type of engine.

but if your head gasket leaks, these may not going to solve the problem for long, their function is mainly to deal with any porosity of the castings or small leaks in "cool" areas - headgaskets are for the most part, exposed to very hot areas.

.

STSevilleSTS 11-09-2009 09:58 AM

95 seville northstar 4.6 . I used the Bars Leaks tablets, on the package it says use 2 tablets for each gallon of cooling system capacity. I put in all 6 tablets. Remove top hose where it attaches to radiator and install tablets in hose.


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