When was the last time you inspected your water pump bypass hose?
Please take a close look before you attack the roads this driving season, because this little hose will ruin your day if it fails on the road. Don’t leave yours unattended, like the one shown here.
If you are unfamiliar, this little hose bridges a port on the water pump to the engine head. You can see it in the top center of the photo below, its the corrugated hose that is horribly cracked.
This one is all done, and needs to changed ASAP. Corrugated is popular, since the hose is hard to get in place and the corrugations allow you to compress the hose to get it between the two nipples. We find that straight hose if far more durable. So if you order one of our bypass hoses, that’s what you’ll get.
You’ll find this repair a lot easier with the radiator removed. And while you are at it, now is a good time to upgrade your cooling system for hot weather driving ahead. Nothing is worse than waiting on a long line to get into a car show while watching your temperature climb to dangerous levels. These are easy to install when the water pump is removed.
We recommend a new six blade cooling fan and, aluminum radiator. We change water pumps proactively too while all this is apart, since the seals can fail and cause coolant leaks. I suggest you fit a deep impeller pump even if you have a 948 engine. You might have to remove a tiny bit of cast iron inside the water jacket to get it to fit, but you will move more water with every revolution. Of course a new thermostat is a good idea too while the cooling system is drained.
There is no such thing as too much cooling on your Spridget. The products listed will help you enjoy the hot weather that lies ahead! The heater valve is a common leak point, so you might want to carry a spare.