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air pocket in coolant on a 90 s2
hi. this has been a problem for a handful of years. my porsche mechanic did the whole timing belt back around 2012. ever since i got it back it wasnt bled right. i could hear it gargling. so i think the air pocket went right to the thermostat. i cant get the air pocket out. now im trying to get the thermostat out. the snap ring clip is kicking my butt. is there a special snap ring pliers you guys use to get it off? a nd is there a way to get the air pocket out. i dont have any access to an air compressor.
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05-20-2021, 10:36 AM
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Join Date: Jul 2004
Location: Upstate New York
Posts: 3,267
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I bought this a couple of years ago, and it works perfectly for that nasty snap ring....
https://amazon.com/gp/product/B000RH3882
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Good luck, George Beuselinck |
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05-20-2021, 11:23 AM
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Join Date: Jul 2004
Location: Upstate New York
Posts: 3,267
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The air pocket will (over time with use) migrate to the uppermost point of the coolant system. Fortunately, Porsche put the bleed screw (12 mm head) at exactly that point. Bleed, bleed and bleed again (best done when the engine is cold... loosen the screw and squeeze the upper radiator hose until coolant comes out.)
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Good luck, George Beuselinck |
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05-20-2021, 11:26 AM
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Join Date: Oct 2002
Location: Boulder, CO
Posts: 1,198
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The only help for an air pocket in getting the thermostat out is that you can drill a tiny hole in it to make it a little easier to bleed the coolant. But this isn't really necessary.
It's super easy to bleed the coolant by blowing into the overflow tube. Maybe clean it first. It's like bleeding brakes but you use the coolant bleeder. Fill with coolant Put your hand over the water neck (cap off) Open the bleed screw Blow air into the overflow tube, blowing coolant into the system. Close the bleed screw Lather-rinse-repeat. Eventually coolant will come out the bleed screw. Way easier than it sounds. Fast too. If you want you can get the car nice and hot, crank the heater, and open the bleed screw again to get any remaining air out also. It also helps to have the front of the car raised up a little. Bleeding the coolant isn't really hard. I think a lot of people just don't actually do it. Or they have leaks.
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1987 928S4 1992 968 cabrio 2009 957 Cayenne GTS Last edited by Jfrahm; 05-20-2021 at 01:54 PM.. |
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05-20-2021, 01:45 PM
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Northern Motorhead
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I had to replace a thermostat on my race car during an event and the only set of snap ring pliers that worked for me was a Blue Point solid tip 90 degree bend pliers ...
I had a set of the replaceable tips pliers with me and they weren't strong enough.Now when i build an engine i make sure i clock that snap ring so that i have easy access to it when the engine is in the car. I use a Stant pressure bleeder on my 2.5 N/A engines and it's a real charm to bleed the coolant system !
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Cheers Phil 89 Coupe,Black,95 3.6 engine and the list goes on ... 1983 944 SP2 race car PCA #96 |
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05-20-2021, 06:54 PM
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Join Date: Nov 2009
Posts: 16
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Never worry about air pockets or incomplete coolant system fill again by buying a vaccum coolant refill kit, similar to one of these: https://www.amazon.com/GooMeng-System-Vacuum-Coolant-Carrying/dp/B07FVZX2BQ/ref=sr_1_10?crid=1WT2DBIJIGWF8&dchild=1&keywords=coolant+vacuum+refill+kit&qid=1621599017&sprefix=coolant+%2Caps%2C179&sr=8-10
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05-21-2021, 04:12 AM
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