Common Issues with the Lexus GS400 Water Pump
A broken Lexus GS400 water pump can lead to a lot of problems that would end up with an overheated engine. Troubleshooting your vehicle's water pump is quite easy as you simply have to look and listen for signs of trouble around this small component. Common problems that occur would be coolant leaks and even squealing noises from loose or worn belts. Take the time to troubleshoot your water pump and you'll find that you could save a lot of money compared to having a mechanic take a look at it for you. Check out our short guide below to find out how.
Leaking seals and hoses
Leaking coolant is by far the most common problem when it comes to faulty water pumps. A good way to start troubleshooting a leaking water pump is to find out if the leak is coming from the water pump itself or from the hoses attached to it. You'll need to go under your vehicle or peer through your car's engine bay to get a good look at your water pump. Check around the front and rear shaft of the water pump as these are common places where leaks occur. If the leak is coming from the hoses, then chances are that you only need to replace the seals inside or the hoses themselves. However, if you notice that the leak is coming from the water pump itself, then you'll need to have it replaced entirely instead. Some water pumps have "weep holes" and if you spot coolant coming out from there, then you definitely have a broken water pump that'll need to be changed ASAP.
Another common problem with water pumps would be a squealing noise near the timing belt connected to the pump. You'll need to check the timing belt powering your water pump and see if it's already worn out or simply loose. Most timing belts can last between 60,000 and 90,000 miles before they need to be replaced. If you're nearing these numbers, then make sure that you inspect your timing belt as it may need to be re-tightened or replaced if it's already worn out.