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Old 05-14-2022, 07:26 PM   #1
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B230ft 2.4 fresh cleaned 3 row radiator. Temperature gauge runs at 9:00 If its driven any great distances it will boil over after shutting off. I am thinking fan clutch but it takes some effort to turn it. The clutch on it is the short tone because of the intercooler.Maybe time for a electric fan.Open for ideas.
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Old 05-14-2022, 07:52 PM   #2
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Try replacing your thermostat yet?
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Old 05-14-2022, 07:53 PM   #3
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Shoot a laser temp gun at the inlet and outlets and see what the temps are. This can be from combustion pressure getting to the coolant system. I'd suggest a compression check and a look at the plugs to see if there is any coolant being burned. Is it running a hot thermostat like a 92C?
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Old 05-15-2022, 04:06 PM   #4
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A failing radiator clutch fan will usually only show itself when idling, or driving slow. I'm assuming because the gauge reads at 9 o'clock we're talking about a 240. If you still have the temperature compensator board in there, it will read at 9 o'clock unless something is wrong. A bad expansion tank cap will lower the boiling point of the coolant, and cause temps to wander more under load from experience. Turbo 940's had a higher rated expansion tank cap that was green but I would do a lot of reading before installing one, I had a plug blow out of my radiator after installing one, which honestly may have just been old dried rubber and going from a broken cap to a new one. With a bad cap, coolant not circulating in the hot turbo is probably boiling and escaping out of the reservoir.
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Old 05-15-2022, 08:43 PM   #5
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Good tip on the temp gun. T stat has no guts. Green resivour cap. Replaced cylinder head with fresh surfaced one.
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Old 05-15-2022, 09:42 PM   #6
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Quote:
Originally Posted by Radtap View Post
Try replacing your thermostat yet?
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Good tip on the temp gun. T stat has no guts. Green resivour cap. Replaced cylinder head with fresh surfaced one.
put on a black cap from a 240
put in a proper thermostat.
without thermostat, lower rad hose can suction shut.
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Old 05-17-2022, 02:05 PM   #7
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Did you "burp" the radiator?
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Old 05-17-2022, 05:42 PM   #8
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1. Pressure tester

2. Smurf Juice
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Old 05-17-2022, 08:27 PM   #9
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Did you "burp" the radiator?
It burps it?s self after shutdown. Thump thump gerrgel gerrgel puuuuk. Noticed that the fan clutch is getting looser. Maybe time for the electric fan.
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Old 05-17-2022, 08:35 PM   #10
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spin the fan up by hand, little to no resistance and turns more than 3-5 times and the clutch is bad, some resistance and very few turns then it's still good or not completely shot yet

Last edited by Radtap; 05-17-2022 at 08:45 PM..
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Old 05-18-2022, 06:45 PM   #11
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Coolant Reservoir Cap may have failed. When mine went bad it would bubble over easily. I carry a spare now.

I would also inspect the thermostat, I had one stuck halfway open and that caused similar problems.

Does your catalytic converter rattle? I replaced a rattling one and my temp gauge rarely climbed above 33% afterwards whereas it usually would rest at halfway while city driving.
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