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In this Discussion
Hydraulic lifters
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I have a couple of hydraulic lifters that are quite pitted due to damp long term storage. I think that they would clean up by resurfacing and am wondering if this is advisable or should I be looking for better lifters. The cam is in great condition. Bruce
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Do you mean the flat tappet face is pitted? If its not too deeply pitted, yes, the can be resurfaced. You need to find an automotive machine shop with a tappet face spherical grinder, as the face has a large radius grind.....put the two faces together and hold up to the light, and you'll see what I mean. This radius is essential to long lifter face and cam lobe wearing characteristics, as it makes the lifter rotate for more even face wear.
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Ken, thank you, I will go looking. I am presuming that the the lifters are pretty much unavailable. Bruce
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Don't panic, there are outfits supplying the inner hydraulic plungers NEW. Right now, I set Cliff Minard onto a company in NJ that told me to send a Hudson hydraulic tappet so they can see if they can be remade new using the existing new hydraulic plungers. In other words, they will look into making the new hollowed tappets for the Hudson to accept the new hydraulic plungers they already are making. I sent Cliff one of my used hydraulic lifter (tappet) assemblies to send to the company in NJ. Let's see what happens. The inner plungers appear to be identical to the ones used on 1948 Cadillac Flathead V-8's and 1949-51 Lincoln and Ford Truck flathead V-8s. They were produced by the Continental Motor Company.
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Thanks, if this dream comes true, I would be in for a full set. I am also considering going to a full flow oil filtering system on this rebuild. Would you have any thoughts on that thread? Bruce
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Hmmm, the full flow oiling system is one reason why hydraulic lifters became more reliable, all the oil gets filtered before it gets pumped into the oil galleries. This reduces the chance of a bit of carbon, gasket, etc getting into the hydraulic lifter's check valve and holding it open, causing it to collapse and the dreaded clacking sound to appear. Hydraulic lifters on bypass filtered cars seemed to have a higher failure rate. A lot of modifications are needed to convert a 232, 262, or 308 to full flow filtering. It has to be done right also, so as not to impede the flow or have low oil pressure. I have no experience doing this conversion, but others in here might post their experiences.
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I have had some experience with these lifters and it would be good to know if they (the plungers) can be specifically built new or rebuilt. A note of caution, the Cadillac flat head lifters are too big for the Hudson, I bought one from Kantor and it clearly does not fit the Hudson lifter, I don't know about Lincolns or Fords. I was told the early 331Chrysler plungers fit, but they are almost unattainable. Apparently, due to premature failure and other problems, they were replaced by conventional types early on and subseqently discarded. I know that Al Saffrahn has sets, I purchased 6 for my '56 engine, and the one I used to replace a noisy one worked. My only suggestion regarding filtration is to run the engine as clean as possible. I am using Castrol Edge synthetic in my rebuilt 308 and everything is ok so far.
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21stcenturyhudson.net has new sets
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Russ, good to know!
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Sorry that they were looking for solid, not hydraulic. We have solid only
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Ken U-TX I sent uou a PM, let me know if it went thru. Bruce
