Rad top hose
- Thread starter Nosheruk
- Start date
N
Norm
Guest
A few tips here. You may want to read through this C3 tech thread on CF regarding bleeding coolant system.
1977 radiator bleeding - CorvetteForum - Chevrolet Corvette Forum Discussion
How to Bleed Air From Your Cooling System | DoItYourself.com
How to Bleed Your Car's Cooling System
1977 radiator bleeding - CorvetteForum - Chevrolet Corvette Forum Discussion
How to Bleed Air From Your Cooling System | DoItYourself.com
How to Bleed Your Car's Cooling System
kentvette
CCCUK Member
Now, if you'd gone with a radiator from Complete Radiators you wouldn't have a "strange
" entry pipe!
But, no, do not cut that, as you have it is fine.
I've never "bled" teh radiator as such, but do follow the precess outlined in the manual:
Fill the radiator to the base of the filler neck and add coolant to the expansion tank up to the "Full Hot" mark. Fit the expansion tank cap, but not the radiator cap.
Start the engine and run it until it reaches normal temperature (the level in the rad will almost certainly drop away soon after the engine is started - I sometimes add a little), and, while it is warming I do give the top hose the occasional squeeze, just to get the water "moving along".
When the engine reaches normal operating temperature, and with it idling, add coolant up to the base of the filler neck and replace the radiator cap. (Use a funnel, the fan blows water everywhere!)
If any further adding of coolant is required (normal topping up) this should be added to the expansion tank, ideally when the engine is cool and to the Full Cold mark.
" entry pipe!But, no, do not cut that, as you have it is fine.
I've never "bled" teh radiator as such, but do follow the precess outlined in the manual:
Fill the radiator to the base of the filler neck and add coolant to the expansion tank up to the "Full Hot" mark. Fit the expansion tank cap, but not the radiator cap.
Start the engine and run it until it reaches normal temperature (the level in the rad will almost certainly drop away soon after the engine is started - I sometimes add a little), and, while it is warming I do give the top hose the occasional squeeze, just to get the water "moving along".
When the engine reaches normal operating temperature, and with it idling, add coolant up to the base of the filler neck and replace the radiator cap. (Use a funnel, the fan blows water everywhere!)
If any further adding of coolant is required (normal topping up) this should be added to the expansion tank, ideally when the engine is cool and to the Full Cold mark.
Corvette Kingdom
Supporting vendor
Its not a 'strange' entry pipe, Corvettes from late 79 had a smaller diameter top radiator hose, that is a Dewitts radiator that is good for 77-82, on a 77-79 early car we would cut that part of the pipe off but its a bit late now its in the car and has coolant in it so don't worry about it.
On a 79 late car you use the smaller diameter pipe, its also an exit not an entry, the radiator feeds from the bottom hose. Those Dewitts rads are the best ones out there for a Corvette, period.
Also the top hose is never really has any coolant in it unless the car is running.
On a 79 late car you use the smaller diameter pipe, its also an exit not an entry, the radiator feeds from the bottom hose. Those Dewitts rads are the best ones out there for a Corvette, period.
Also the top hose is never really has any coolant in it unless the car is running.
Corvette Kingdom
Supporting vendor
And always run the engine with the rad cap off and the heater on until the top hose is hot all the way along, topping up as necessary and then fit the cap. That is how you bleed the system.
N
Norm
Guest
No need to cut anything, follow the advise above. Good luck with fix.
Nosheruk
Well-known user
Thanks so much for the replies 
.
When it was up to temprerature, the top hose was hot at both ends but not in the high point in the middle.
I guess this was due to hot water was passing through, but not at a rate that would fill the pipe comletely therefore there will always be air at the very top?
Please dont laugg at my crappy sketch
.When it was up to temprerature, the top hose was hot at both ends but not in the high point in the middle.
I guess this was due to hot water was passing through, but not at a rate that would fill the pipe comletely therefore there will always be air at the very top?
Please dont laugg at my crappy sketch
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N
Norm
Guest
You may be just a tad overly concerned about purging all the air from the system. I would just drive normally and keep an eye on it until you're satisfied there are no leaking or temp issues.