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Question on flushing the radiator
Hi guys - been lurking here now that the 924S has been successfully pressed into regular service (with your help). All is well but she continues to run a bit warm, not dangerously hot, but consistently warm. As a reminder this car sat in my neighbors garage for 1o+ years before I got her back on the road.
She has a new water pump and thermostat and the fans work etc..., so while drive last night it occurred to me that I changed the coolant but never backflushed the radiator or ran and flushing solution through her. Duh.... Anyway, seems like this would be a good idea as normal maintenance anyway but I wanted to check first if there is any collective wisdom on do/don't here. Thanks! |
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08-01-2010, 06:37 AM
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Proprietoristicly Refined
Join Date: Jul 2001
Location: ~Carefree Highway~
Posts: 5,833
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Since you changed the coolant, WP and thermostat its a shame to drain the coolant again.
What part of the US do you live in? NW-NE SW-SE? Soak completely the AC condensor and radiator fins with a diluted solution of Simple Green or similiar and let soak for a while. Rinse/flush from the engine side to the grill with a hose. If you do it the other way you push the dirt deeper into the fins. Add a bottle of water wetter or similiar.to drop the temp a few degrees. Did you use a Behr or Wahler thermostat? Any other brand is BAD. Your coolant reservoir cap, did you test it? Is it the correct cap? Flushing the radiator. Yes you could do it. About all you can do is backflush with a hose and maybe some weak, standard flush. If you used a HD cooling system cleaner, you will have a leak between the plastic and metal part of the radiator. Before you do anything, rent/deposit a cooling system pressure tester from AutoZone. Put in 10-12 pounds of pressure and see if you have any pin hole leaks to fix. GL John
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1988 924S, 85,750K ..+ 1987 924S, 154K DD (+15K est. bad odo) |
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08-01-2010, 09:01 AM
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Great info (as usual) - thanks. Let me check the pressure of the system and clean everything and go from there.
FYI - I am in SoCal. |
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08-01-2010, 03:28 PM
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Registered
Join Date: Nov 2005
Location: Visalia, Ca
Posts: 1,327
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lots of dead bugs , rocks and other types of debris with bent fins on the ac condenser i believe its called does not help. 3-5 buks and you can get a fin straightening tool from harbor freight wish i knew about it sooner as i did it all by hand with a flat tip screw driver.
I live in central california and it gets pretty hot to. I installed a lower temp thermostat and fan switch wich helps. If you have a charging problem you will find out real quick with the fans going on much sooner. Only side affect i think is that since the car doesen't make it to the half way point it does not burn the fuel as efficient i would assume, little lower MPG but i think i can live with that
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Jaime O. Thank god I crashed or i would never have owned a porsche 83 944 daily driver (clutch and tt time) 85 325e BMW T-boned R.I.P. |
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08-03-2010, 11:48 AM
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