Heat Exchanger Nut Tool, 914-6 Hex Nut Options

[DennisV]

What have you found or fabricated to tighten the 13 ATF hex nut on 914-6 heat exchanger passenger side? I think that's cylinder number 1.

I'm sure this is probably mechanics 101, but I'm having a hard time with it. I've tried every combination of 1/4 socket, u-joint, wobble extender, flex driver I can find. No room for a box or open end wrench as 2 sides are blocked by bracket and pipe. Nothing I've tried provides enough engagement to properly tighten it.

[sixnotfour]

best kept secret,,
https://www.amazon.com/dp/B0BB8R2973?lv=shu...rect=mhFallback

[DennisV]

best kept secret,,
https://www.amazon.com/dp/B0BB8R2973?lv=shu...rect=mhFallback

(IMG:style_emoticons/default/ohmy.gif) That is an interesting idea. Wasn't aware of these. Only the copper exhaust nuts which I think are 12 mm ATF and I was planning to transition to.

and your studs short..

Thanks for pointing that out. I believe that's an optical illusion because I haven't tightened the nuts before taking that photo. At least I hope that's the case.

I've learned a painful lesson during this project. Never trust the stud height on anything. I would have liked to think that a highly rated machine shop would have caught / corrected these things, since they would have had to remove and reinstall in many cases, but clearly not. It has bitten me a couple time now. Too short on the intake side and I had to replace them all. One of the barrel nuts on the exhaust side was too long and I could only torque it to 10 ft. lbs. before the wrench hit the stud.