Hey guys. After putting in a new engine, we noticed a coolant leak. I couldn't find it for the longest time, but I think I have. All the way down to the intake, with the cooling line coming from the water pump. I think this explains why it wasn't droping coolant until the runner had been driven for a bit, the pit at the intake had to fill before the coolant would drop. The question I have is this: Should I replace the old o-ring with another simular sized o-ring from a harware store, or shoudl I use gasket seal/paper and cut it to fit the fitting on the cooling line. Which do you think will hold up the best? I DO NOT want to have to fix this PTA again!! Thanks guys. Here are the pix:

 

When I just rebuilt my top end I just scraped it down nice and clean and used RVT. Hasn't leaked yet...

 

Go to the dealer it want cost much and will give you peace of mind. Why would you want to skimp on someting that hard to change. Just my .02 Bryan