Coolant supplement pills
Thread Starter
Burning Brakes
Joined: Nov 2000
Posts: 810
Likes: 3
From: Austria
Coolant supplement pills
i want to change my coolant on a 90 L98, and my question is, how useful are the collant supplement pills.
i´ve heard a few people saying, that they are not necessary, and mabe its better to live without them,...
thanks
i´ve heard a few people saying, that they are not necessary, and mabe its better to live without them,...
thanks
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
Re: Coolant supplement pills (corvette90)
GM apparently no longer recommends them when doing a cooling flush. If the coolant in your system looks good, flush it and use distilled water for the last flush cycle and then refill with the correct mix of a good coolant (ethelene glycol - Prestone) and distilled water.
If you haven't changed hoses, this would be the time to do it.
If you haven't changed hoses, this would be the time to do it.
Melting Slicks
Joined: May 2001
Posts: 2,143
Likes: 7
From: San Diego CA
Re: Coolant supplement pills (corvette90)
I used them about 10-15K miles ago when I had to replace the water pump. Before I replaced the pump, I had a slight coolant leak unrelated to the pump. I used 5 of the 6 pills. It stopped the leak. I also gummed up the little orifice that controls coolant to the heater core, gummed up the recovery tank, and who knows what else.
If I were to do it again, I think I'd dissolve them outside the system and use only 1 at a time.
If I were to do it again, I think I'd dissolve them outside the system and use only 1 at a time.
Thread Starter
Burning Brakes
Joined: Nov 2000
Posts: 810
Likes: 3
From: Austria
Re: Coolant supplement pills (c4cruiser)
hi..
yes, my collant looks fine no leaks, but it has his age..i own the car already 2 years, ans i dont kon how often the pre owner changed it..
thanks
yes, my collant looks fine no leaks, but it has his age..i own the car already 2 years, ans i dont kon how often the pre owner changed it..
thanks
Safety Car
Joined: Jun 1999
Posts: 3,570
Likes: 3
From: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
Re: Coolant supplement pills (John Row)
When I pulled the heads and flushed the system a year ago, I asked the dealer about the pills and they said they were not recommended.
I did not add the pills when I flushed the system. I have a theory that after some period of time, the small holes will be plugged and when you flush the system, you don't need to add more.
I did not add the pills when I flushed the system. I have a theory that after some period of time, the small holes will be plugged and when you flush the system, you don't need to add more.
Pro
Joined: Dec 2000
Posts: 700
Likes: 20
From: Derby Kansas
Re: Coolant supplement pills (Mez)
Not to show my ignorance, but does your 96 use Dex-Cool or "normal" green stuff. I know that the pills ARE NOT to be used with Dex-Cool.
The pills supposedly act as a conditioner and helps to seal/prevent SMALL leaks.
I change/flush my coolant every 2 years. I've used them in my previous 92 Z28, 95 Z28 and currently in my 78 Z28 and 85 Corvette with no problems at all.
The pills supposedly act as a conditioner and helps to seal/prevent SMALL leaks.
I change/flush my coolant every 2 years. I've used them in my previous 92 Z28, 95 Z28 and currently in my 78 Z28 and 85 Corvette with no problems at all.
Safety Car
Joined: May 2002
Posts: 4,010
Likes: 26
From: Somewhere nowhere
Re: Coolant supplement pills (Ron78Z&85Vette)
Not to show my ignorance, but does your 96 use Dex-Cool or "normal" green stuff. I know that the pills ARE NOT to be used with Dex-Cool.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette
Pouria Savadkouei
Thread Starter
Burning Brakes
Joined: Nov 2000
Posts: 810
Likes: 3
From: Austria
Re: Coolant supplement pills (larryfs)
in my 90 its green stuff in it...
that was what i´ve heard..the pills are supposed to plug the heater core..
and i don´t think, that if you have a leak they help much..
thanks
that was what i´ve heard..the pills are supposed to plug the heater core..
and i don´t think, that if you have a leak they help much..
thanks
Burning Brakes
Joined: Aug 2000
Posts: 984
Likes: 1
From: Cincinnati OH
Re: Coolant supplement pills (larryfs)
GM used the pills with dex-cool on the 96 impalas. apparently they did NOT do this on the 96 corvettes.
