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greenacc

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For this job I don't think it matters too much which product. Those aviation ones are usually pretty good as long as it says it is suitable for rubber. A smear of gasket silicone on the rings would also work but the one I had was a brown one like contact adhesive. Can't remember what I even had that for, no doubt it's not the right thing to use with coolant orings. Really Orings should not need any sealant on them because they are designed to seal by compression against the metal faces. Sealant will only help if the faces are corroded to help fill the pits, if you're lucky.
 

rambunctious

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For this job I don't think it matters too much which product. Those aviation ones are usually pretty good as long as it says it is suitable for rubber. A smear of gasket silicone on the rings would also work but the one I had was a brown one like contact adhesive. Can't remember what I even had that for, no doubt it's not the right thing to use with coolant orings. Really Orings should not need any sealant on them because they are designed to seal by compression against the metal faces. Sealant will only help if the faces are corroded to help fill the pits, if you're lucky.
That's correct. All you need is something a bit slippery for the O ring but not the funny shaped rubber.
The only reason I used a little rubber grease was so the circular fitting with the O ring would slip inside the block easy, and it did.
I would not use anything on the funny shaped rubber as it is better fitted dry, as you found out the hard way.
I cleaned the fittings where the rubbers go with a small wire brush and cleaned the block with a bit of emery cloth..
 

Moosejaw

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Thanks to yourself and the others i now have good seals and new water pump up front...but...upon doing the the refill and bleed i noticed that the radiator inlet hose did not at any time fill..it remained squeezy and no liquid came out of bleeder...is it now fair to say that the thermostat did not open even though temps above 100 were reached? Possibly looking at the dreaded thermostat replacement drama? Any other possible cause or explanations would be very welcome.
 

scaredyet

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This is an amazing write up. I have serious issues with my cars cooling system. I hope I can sort these out. Would a pressure test be the first thing to do in order to find where the leak is or do you just go ahead and change hoses gaskets etc
 

greenacc

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This is an amazing write up. I have serious issues with my cars cooling system. I hope I can sort these out. Would a pressure test be the first thing to do in order to find where the leak is or do you just go ahead and change hoses gaskets etc
Finding a leak should not be difficult, especially if you are using the correct red coolant as it leaves pink stains everywhere when it dries.
Where is it leaking from?
 
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