does anyone know whats best to use on the waterpump union tube (to oil)... installed a replacement waterpump the other day and thought it was all gravy but after about 15 - 20 mins of letting the car run it leaking like crazy and making some crazy hissing sound like a hose or something has come loose possibly the union is not sitting properly.. had some pressure spraying and steam / water coming from that area but could not see properly with everything reinstalled... i used a bit of coolant on the o-ring in the union like ive seen on a video / thread somewhere but am seeing sillicone lubricant grease or even sealant is best.
already watched / inspected underneath the car during warming up and had a bit of dripping looked like it was starting somewhere near where the thermostat screws onto the block and was in a completely different spot to where the last pump was leaking.. am assuming it is near the union somewhere and then started making all the dramatic noises and spraying after approx 15 - 20 min so probably built up too much pressure / heat for it.
already watched / inspected underneath the car during warming up and had a bit of dripping looked like it was starting somewhere near where the thermostat screws onto the block and was in a completely different spot to where the last pump was leaking.. am assuming it is near the union somewhere and then started making all the dramatic noises and spraying after approx 15 - 20 min so probably built up too much pressure / heat for it.
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