Piston Slap: Steps to avoid cross threading the Courier?
Sir, you were very helpful to me before, and I hope you will take the time to shed some light on my latest issue.
The slave cylinder on my 1979 Ford Courier, four-speed with the 2.0-liter engine, started leaking. I ordered a replacement Lux brand slave cylinder, but when I attempted to thread the hydraulic line to the cylinder it would start to thread on but then bind up. I was very careful to make sure I was not cross-threading it. After numerous attempts I tried screwing the line back onto the old slave cylinder and it threaded on. Thinking that maybe the threads were bad on the new cylinder I sent it back to Parts Geek and ordered a Dorman slave cylinder. Exact same thing happened; it would only screw on partly and would then bind up.
I have looked at the threads on the supply line and do not see anything wrong with them. I was able to order a rebuild kit and will attempt to rebuild the old slave cylinder and see if that works.
I am not a mechanic, and my level of ability is mainly limited to changing the oil, filters, coolant, and spark plugs, but I did think this was a job I could handle. Thank you for your time.
Hello, Victor. Thank you for reaching out; I am happy to help. This absolutely sounds like something you can do, provided the part was actually manufactured like the original bit from Ford/Mazda. I have a feeling that the best move is to ship your old slave cylinder to a place like this and have them rebuild it. You might have a hydraulic shop in your city that can also do the same service, and it’s always great (and convenient) to support a local business.
I reckon there is a manufacturing error on all these new slave cylinders, and there’s only one factory in China making them for all brands. Or perhaps there was a design change over time, and the automated system online isn’t letting you buy the right part. You can try ordering multiple cylinders at a part store too; they will be happy to help. But I think getting yours rebuilt might be the best move. Tell me what you think.
Thank you for the quick reply and advice. I will send the slave cylinder off to the company you recommend and have it professionally rebuilt. Would it be a good idea to start and run the engine every so often while the truck is sitting with the slave cylinder off?
Running the motor in the meantime is certainly not a bad idea, but there’s no need to do it. Depending on the age and formulation of the gasoline in the tank, a vehicle can sit for many weeks while you wait for the new part. I can keep my cars sitting around for months (not by choice), so keep that in mind.
Let me be clear on one thing, however: I do NOT have experience with the company I referred you to. I just wanted you to know such places exist. You should look into multiple vendors across the internet, maybe use this link to find one. I’ve said it before, and this question proves it, the Google “near me” search is absolutely crucial if you own a classic with limited parts support. (You know, not a Camaro, Ford Truck, Corvette, etc.)
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