Burping the radiator, and which coolant to use?
#1
Been selling Twinkies on Ebay,
have some extra cash right now.
Rennlist Member
have some extra cash right now.
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Since my end tank started leaking on the way to 3rd Coast, I am replacing my radiator with a used unit from 928intl.
Can I burp the system by simply raising the RF corner of the car and letting out the bubble?
Also, which coolant to use?
Thanks
Can I burp the system by simply raising the RF corner of the car and letting out the bubble?
Also, which coolant to use?
Thanks
#2
Race Car
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Seems that Zerex G-05 is the one most have recommended for the stock Behr radiator. Of course you will probably hear about 20 opinions on any fluid involving a 928!
![hiha](https://rennlist.com/forums/graemlins/roflmao.gif)
#3
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
The 928 cooling system is quite civilized and no need to burp.....it has built in self burping with the coolant tank being the highest point of the cooling system and a vent hose from thermostat housing to the tank. The 944 on the other hand could trap an air bubble so you needed to help it.
#4
Vegas, Baby!
Rennlist Member
Rennlist Member
![](https://rennlist.com/forums/images/ranks/veteran_navy.png)
![](https://rennlist.com/forums/images/ranks/veteran_marine_corp.png)
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Hi Erik, Mike is correct. Use the ZEREX G-05, plus a bottle of Redline Water Wetter, and fill with distilled water. I only used a gallon of coolant in my 87, and the needle stays one needle width above the first white line, A/C on or off.
#5
Team Owner
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
there is also a bleeder from the top of the radiator to the coolant bottle.
To fill the coolant system .
with the car level fill the coolant bottle,
till the coolant will no longer fill (about 4 gallons).
Have the heater on full hot.
Then run the engine with the cap off till the fans come on or the coolant system reaches operating temp about 5 to 10 mins of running,
then replace the coolant bottle cap, and go for a 5 to 10 mile drive with the heater on,
park the car let it cool then open the cap and top it off if necessary
To fill the coolant system .
with the car level fill the coolant bottle,
till the coolant will no longer fill (about 4 gallons).
Have the heater on full hot.
Then run the engine with the cap off till the fans come on or the coolant system reaches operating temp about 5 to 10 mins of running,
then replace the coolant bottle cap, and go for a 5 to 10 mile drive with the heater on,
park the car let it cool then open the cap and top it off if necessary
Trending Topics
#8
Rest in Peace
Rennlist Member
Rennlist Member
Join Date: May 2006
Location: Bird lover in Sharpsburg
Posts: 9,903
Likes: 0
Received 2 Likes
on
2 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
The 928 cooling system is quite civilized and no need to burp.....it has built in self burping with the coolant tank being the highest point of the cooling system and a vent hose from thermostat housing to the tank. The 944 on the other hand could trap an air bubble so you needed to help it.
#9
Been selling Twinkies on Ebay,
have some extra cash right now.
Rennlist Member
have some extra cash right now.
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Greg-
I thought you mentioned at 3rd Coast that the reason the R upper end tank is prone to failure (as mine is) is because there is a bubble that lives there?
I thought you mentioned at 3rd Coast that the reason the R upper end tank is prone to failure (as mine is) is because there is a bubble that lives there?
#10
Team Owner
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
there is a bubble that lives on the top of the right hand tank,
since there isnt a bleeder vent .
the air pocket lets the plastic tank get brittle and it will eventually crack.
since there isnt a bleeder vent .
the air pocket lets the plastic tank get brittle and it will eventually crack.
#11
Rest in Peace
Rennlist Member
Rennlist Member
Join Date: May 2006
Location: Bird lover in Sharpsburg
Posts: 9,903
Likes: 0
Received 2 Likes
on
2 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Let me expand on what we were talking about, the point I was trying to make is that if coolant is leaking to the outside, when it cools it will suck in air.
I have never had to really burp a 928 cooling system, even though I do sometimes to get a quicker fill.
#12
Team Owner
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
if you want to verify the bubble in the tank,
with a removed/failed tank ,
you will see a white line about 5mm below the top of the inside of the tank,
this is where the top layer of coolant is.
with a removed/failed tank ,
you will see a white line about 5mm below the top of the inside of the tank,
this is where the top layer of coolant is.
#14
Administrator - "Tyson"
Lifetime Rennlist
Member
Lifetime Rennlist
Member
#15
Rest in Peace
Rennlist Member
Rennlist Member
Join Date: May 2006
Location: Bird lover in Sharpsburg
Posts: 9,903
Likes: 0
Received 2 Likes
on
2 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
One thing I like and hate about G-05 is that if there is any leak it is easy to find due to the white residue left, but it is a bitch to clean up.