Shhpladow Posted August 11, 2012 Share Posted August 11, 2012 Ok ive got a 260z with all the emissions junk.i bought a set of ztherapy carbs and clean tube from them as well. Is it ok to just make a plug coming out of the waterneck and just eliminate all the coolant lines going to the intake? Or if someone has a pic of a setup like this i would greatly appreciate it. I havent found a picture directly of the waterneck plugged.thanks Quote Link to comment Share on other sites More sharing options...
josh817 Posted August 14, 2012 Share Posted August 14, 2012 Take this guy: Loop it to this guy: You don't have to plug the manifold or anything unless you have water going into/out of it from some other source. I assume manifold heat came from the thermostat thing I showed in picture 1. Quote Link to comment Share on other sites More sharing options...
rayaapp2 Posted August 14, 2012 Share Posted August 14, 2012 Take this guy: Loop it to this guy: You don't have to plug the manifold or anything unless you have water going into/out of it from some other source. I assume manifold heat came from the thermostat thing I showed in picture 1. If he has a stock 260Z he doesn't have a lower radiator hose water neck like that. At least none of the ones I have seen have that line. The L28 came with that extra coolant line off the lower radiator hose neck for the TB and air regulator I believe. The L26 260Z and 240Z has the coolant passage that wraps around the back of the block to go through the carbureted manifold plenum areas. IF you plug the thermostat housing waterneck you will also have to deal with the hoses on the passenger side rear of the block. Perhaps delete the Y fitting near the dip stick tube. That is usually what I do(In this climate area I never run heated carbs/intakes), but there is some debate about messing around with the coolant passages here on hybridz. Quote Link to comment Share on other sites More sharing options...
Leon Posted August 14, 2012 Share Posted August 14, 2012 Yep, Ray is right, my early 260Z doesn't have that Tee. I'll be using a pipe plug for the thermostat housing (BSPT threads, order from Mcmaster). I've deleted the Y-fitting near the dipstick as well. Quote Link to comment Share on other sites More sharing options...
rejracer Posted August 16, 2012 Share Posted August 16, 2012 SU's run terrible in cold weather without heat from the coolant lines. Regardless if that is not an issue, I've had mine plugged off using a NPT plug, but I re-tapped the hole to do so. If you don't have the appropriate size tap, then do as Ray and Leon suggest. Quote Link to comment Share on other sites More sharing options...
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