Cooling issue
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New User
Joined: Jan 2005
Posts: 21
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From: Southern California
Cooling issue
On an 89 7.3 deisel thermostat manifold the is a ball in a socket, I assume this is a check valve of some sort. If that hole is plugged up will it cause the coolant temp to raise?? If so how much or will it cause the engine to overheat eventually?
Last thing, could advancing or retarding the injection pump cause the overheat?
Thanks in advance,
b2qared
Last thing, could advancing or retarding the injection pump cause the overheat?
Thanks in advance,
b2qared
Fleet Mechanic
Joined: Sep 2005
Posts: 1,509
Likes: 3
From: Ladner, British Columbia
The ball check is part of the bypass system that lets any air and non-condesible gases or steam escape to the radiator.
If it is working properly you should hear a faint gurggling sound as you fill your engine with coolant.
If the ball is plugged up then air or steam can't escape and the hot coolant might not reach the thermostat so it can open and the truck may overheat.
Sometimes older thermostats start to leak a little and any air is discharged thru the leak path. A fouled ball check is not a problem in this situation; however if you decide to install a new thermostat and fail to clean the ball check that you may have more overheating problems with the new thermostat than you had with the old one as suddenly air or steam has got nowhere to go and vapourlocks the engine coolant loop.
Seb...
If it is working properly you should hear a faint gurggling sound as you fill your engine with coolant.
If the ball is plugged up then air or steam can't escape and the hot coolant might not reach the thermostat so it can open and the truck may overheat.
Sometimes older thermostats start to leak a little and any air is discharged thru the leak path. A fouled ball check is not a problem in this situation; however if you decide to install a new thermostat and fail to clean the ball check that you may have more overheating problems with the new thermostat than you had with the old one as suddenly air or steam has got nowhere to go and vapourlocks the engine coolant loop.
Seb...
