Doing the 1/2 pick up. I have done probaly 100 or close to it. No problems. What i did was take the drill used for the rebore to a tool making shop and had him grind down the front of the drill to the 3/8 NPT hole size . That way the drill is piloted in the old hole and you dont have to worry about angle, wobble etc. I resharpened the wings at the step myself with my die grinder. I cost me $12 dollars to have the drill ground. The other trick is to used a GOOD 1/2 pipe tap. A good sharpe one cuts while a dull one spreads the hole or trys. Another thing I have seen is people going on about the hole in the block needs to be enlaged all the way through or the whole excersise is pointless. Not so. If you look at the size of the INSIDE of the 1/2 pickup and the size of the hole in the block beyond your new threads you will see they aere almost identical if not identical and there is now a smooth hole the same size all the way through once the 1/2 in pickup is installed. The 3/8 NPT pickup caused a huge restriction when installed. The /'2 is inside the same as the original hole. I know the person who sugggests the idea years ago meant well but in actual experince just succeeded in screwing up an almost perfect mod. Sometimes we need to think a bit beyond the obvious. I have made a few blunders myself. I try though to only make them once.
Don----- Original Message ----- From: "Dave Walters" <dbustersdad@xxxxxxxxx>
To: <1962to1965mopars@xxxxxxxxxx> Sent: Saturday, April 11, 2009 7:38 PM Subject: RE: 1/2 inch Oil pick up...
Mr Christopher wrote:Good Morning all! I am getting some bids for my engine work locally for hopes of getting my engine (Ole' Reliable build) done this fall. I gave the guy some of the spec's for the block and he questioned tapping the oil pick up to 1/2 inch. He said, "it is over kill." "Sure you have more volume, but the gallies are the same size." Do I need to walk away from this guy?? Christopher Glick '64 Dodge 440 2Dr HrdTpWell, Chris it's likely that it's just one of two shops in town that know Mopars - OK, maybe three. None of them have modern CNC equipment. While I advocate the procedure, it's the local execution that is lacking. IMO, the casting/location of the pick up boss plays a big part in the decision to do it by hand. A guy in the RPM club had his done by the BS and the pick up boss later cracked, sucked air, then trashed the engine. The BS no longer is willing to do this procedure, or if they do, they strongly advise against it. It's one of the reasons I chose to have my block sent out of town. I had my entire block CNC'd machined by Chenoweth Racing in IL. They offset ream the original opening toward the rail of the block, then blend the passage. This leaves the crank side of the boss with plenty of meat. Dave Walters Denver,CO. ----Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks!'62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.
---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines:http://www.1962to1965mopar.ornocar.org/mletiq.html.
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