Quote:
Originally Posted by MARKDTN
Early heads (before 1975 I think) have a "big" hole. Later heads have a "small" hole. Try a sender for an 1980 Corvette.
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Thanks Mark - yes, that is the problem, however just using the later sender won't give correct readings on the 72 gauge - different resistance ranges in the sender. I could give this a shot as a last resort and try to fix the readings with resistors as mentioned above, but I'd prefer to make the correct sender work with the factory gauge. I may need to go this way eventually.
Quote:
Originally Posted by Tx Firefighter
One of these along with a drill bit and you're ready to put the original sender in. Cast iron drills and taps super easy. You've already got a pilot hole there so there's not much material to remove.
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Thx Kevin - I think I'd choose this route if I had the heads off. I have heard folks doing this and maintaining the chips on the tap with grease, etc, but have to admit I think I'd only be comfortable doing this if I had the heads off and I could confirm I got all the chips out - otherwise run the risk of fouling the water pump or clogging a passage. But, agree this is the BEST approach.
I think I will try the turning down of the TU5 first, if it seals and works, yay, if not, I'm only out a few bucks for another sender and then I'll yank the head.
Thanks gents. If I don't hear from Brian Mac, I may ping my local machine shop, have a decent one here.