CK5 Network
Repairing, restoring or modifying your ride just got a whole lot easier!

rad size

1989k5

Registered Member
Joined
Jun 10, 2003
Posts
36
Reaction score
0
Location
near Lake Superior, Wisconsin
What is a rad?? If you mean rod, the answer is no. Your old rods will work, but I would have them checked. I always put in new wrist pins and even balance them by weighing all 8 and removing some material to match the lightest one. Also make sure you stamp your rods and caps so they are matched when you reassemble. I however would rather bore .030 or .040 over in case the block would ever need to be rebuilt later for a badly scorred wall or scratch. Good luck!!
 

Paxx

1/2 ton status
Joined
Feb 9, 2003
Posts
1,405
Reaction score
2
Location
All Over Western Canada
I did mean radiator. My buddy is having some frusterating cooling issues and we are starting to wonder if the rad is just too small.
 

pauly383

Daddy383
Joined
Jul 22, 2001
Posts
16,216
Reaction score
4
Location
Mesa , Arizona USA
How does the gauge read. Sometimes too hot or too cold would indicate bad thermostat. When they stick open a little it may run too cold. If it don't open at all you'll overheat. I assume you already checked the easy things like belts etc? Are you running water , or a coolant mix? Also check the fan clutch if mechanical fan. If that isn't clutching the engine won't pull enough air to cool it . Hope these thoughts help. /forums/images/graemlins/thumb.gif /forums/images/graemlins/k5.gif
 

Paxx

1/2 ton status
Joined
Feb 9, 2003
Posts
1,405
Reaction score
2
Location
All Over Western Canada
hmm they do help. We have no thermostat in it right now just to simplify it a bit. The temp will stay fairly constant for short periods of time and then put of nowhere it will spike up to the danger levels. So then you stop and wait a while, drops down, cruise for a while, then it will spike again. Very frusterating. I'll get him to check the clutch. Is there an easy way to do this?
thnx~Max
 

pauly383

Daddy383
Joined
Jul 22, 2001
Posts
16,216
Reaction score
4
Location
Mesa , Arizona USA
There are two styles of clutch. One is thermstatically controlled, there is a spring like a choke spring in the center, it should kick on when warm. The other style is centrifigal clutch , it has fluid in it, it works at lower speeds and slows down on the highway. I may be backwards on it, been so long since mine was bad. Someone should correct me if I have it backwards. Hope it helps /forums/images/graemlins/thumb.gif

BTW you should run a thermostat, it will hold back the water so it can absorb the heat, then open and send it to radiator to dissipate it. May make all the difference /forums/images/graemlins/waytogo.gif
 

skratch

1/2 ton status
Joined
Oct 28, 2003
Posts
1,646
Reaction score
1
Location
Gorveport, OH
The easist way to check the fan clutch from what I remember is to: try to turn it when the rig is cold and see how much resistance you have, there should only be a little resistance then. Then when the temp spikes like that and the truck is good and hot stop it and try to turn the fan right away again, it should be really stiff like your trying to turn over the engine. If it doesn't have any resistance then it's most likely bad.
But you really need to stick a thermostat in there too, that will make a ton of difference too.

If after all that you still have issues, get a large four core or a wide tube two or three core. I have a wide tube two core that supposedly cools as good as a normal 4 core. It does work a lot better than the original radiator, but I'd still like to run a large 4 core. /forums/images/graemlins/waytogo.gif
 

rjfguitar

3/4 ton status
GMOTM Winner
Joined
Aug 28, 2002
Posts
9,120
Reaction score
175
Location
california
[ QUOTE ]
BTW you should run a thermostat, it will hold back the water so it can absorb the heat, then open and send it to radiator to dissipate it. May make all the difference /forums/images/graemlins/waytogo.gif

[/ QUOTE ]
I agree, The water needs to be held back so that an actuall transfer of heat can take place between the cylinder walls and the water.
 
Top Bottom