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Tee Dee 049 conrod lubri-hole Babe_b10
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Post  balogh on Sun Jun 02, 2013 1:17 am

I purchased a NIB COX 049 Tee Dee recently. This is probably from a pre-1973 series as the venturi has no mash on it and the collet is anodized gold. When disassembling to remove gummed oil I noted something I have never seen in a multitude of COX engines I have ever owned: the lower bearing of the conrod has a small hole drilled on it to facilitate the crankpin lubrication.


I checked it on some of my other Tee Dees both could not find the hole on other pre- and post 1973 engines.
I checked the piston history in various COX literatures on the net but could not find any trace of the lubrication hole...

I know the COX production was sometimes inconsistent in terms of collet colors, anodization, etc. depending on the competitive situation on the market, but that was more or less changing cosmetics only.


There must have been a reason for COX to put that hole there - though, some of my COX engines have run north of 50 hours with still only minimum cranckpin wear on them... thus I assume COX recognized the hole is probably superfluous.

Anybody has seen/read/heard about it?
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Post  JPvelo on Sun Jun 02, 2013 1:38 am

I have one of those and the conrod is held into the piston with a circlip.
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Post  balogh on Sun Jun 02, 2013 1:46 am

JPvelo wrote:I have one of those and the conrod is held into the piston with a circlip.

That must be a pre-1958 piston when COX abandoned the circlip and started with the balljoint design. TeeDees were born in 1960 so I guess at least the conrod lube-hole of the pre-1958 design was continued on the early TeeDees? It means I have a really old but NIB Tee Dee from probably the first production runs...But this is just a bold speculation about the vintage series I may have, on my side.
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Post  Ken Cook on Sun Jun 02, 2013 5:19 am

All of my Tee Dee's that have the oil hole that your questioning are all thin walled cylinder Tee Dee's. I don't know much in terms of dates with these engines. I also noted the rod material color is different than any other Cox conencting rods. They probably made them for several years and trying to pinpoint a date is probably difficult. The oil hole was probably omitted due to cost and the fact that it isn't required. The crankpin on the crankshaft breaks before you wear out the bottom end of the rod. Ken
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