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Water can enter and displace the grease in the wiper arm linkage ball joint where the wiper linkage attaches to the wiper motor linkage.
This can result in gradual wear over a period of time inside the joint that could lead to the separation of the wiper linkage assembly from the wiper motor linkage at the ball joint. A loss of windshield wiper function can result when this separation occurs.
To prevent grease from being washed out of the joint, the dealers will modify by adding a water diversion seal that will prevent water from entering the windshield wiper linkage ball joint area.
on the 97 escort,check the sway bar,also the sway bar links.My daughter has a 97 escort,both sway bar links had to be replaced at 150,000.mi.relatively cheap to & easy to Replace.hope this helps Richard
This is a DIY fix for a dollar.The white plastic caps that join the wiper arms together in the wiper assembly commonly wear and break under normal use. 1984 - 1986 Honda CRX and Civics also used these plastic caps for a short time - much to my dismay. In my 2000 Subaru Legacy and Subaru Forester (should work on 2001, 2002, 2003, and 2004 models as well), there is an easy DIY solution that will take care of the excessive play in the wiper travel, as well as the common 'wiper clunk'. Head over to your local auto parts store an purchase a PCV Valve grommet for a Toyota. Part number 42058. These are only a dollar, and are normally stocked on the shelf. If you put the phrase 'pcv valve 42058' into to Google Image Search you will see what I mean. I’m attaching a picture as well. For installation, gain access to the wiper assembly, I recommend removing the entire assembly (arms and motor) from below the black trim piece under the windshield. Inspect all the joints. If you have a loose joint, remove the white plastic cap and the arm from the ball joint. Slide the PCV Valve Grommet over the ball joint and press the arm into the grommet. This is now a perfect, snug fit. Wiper blades slamming into the car is a thing of the past.
Hi, you are spot on mate with bottom ball joint if you have knocking noise a sort of rattle on rough road or over bumbs then this is 100% the bottom ball joint these are cheap to buy and its best to replace both sides as you will only get the same problem with the other one sooner rather than later.
These you can replace yourself as it is only a copule of bolts just need to have the car jacked up and on stands.
The only tool that you might need is a ball joint splitter as they tend to be seized on the bottom ball joints are cheap to buy less than £10 uk or £15.
Its better you replace them sooner rather than later because if the ball joint breaks off it will cause nasty accident so only drive if necessary so please get this done asap if it does go then it can do a lot of damage costing several hundred pound to repair also if it does go the car will be stuck where it is and will then need lifting off the road as you wont drive it so you are spot on with the fault but please get this done. If you have any problems then post back
Try google in the make of car followed by ball joint replacement this will then tell you how to do this process should only take 2 or 3 hours to do.
Hope this tells you what you need to know
This is a tough problem to answer. There are a lot of variables that can cause premature ball joint wear. The most common concern is the road you drive on, the tires and rims you are using and the mileage you have gone.The part that you installed,did it have a grease-able zerk fitting to add to the joint? Is the alignment correct, are there any other parts failing? (like the boot that covers the joint?)
Most likely you will have to replace the wiper linkage from the center pivot to the left or drivers-side wiper pivot. The plastic piece in the linkage gets brittle over time and breaks down. To save a hassle in the future, replace both linkages. It should be under $20.00 for parts.