Posted by Traveler on October 25, 01 at 11:38:03:
I finally decided to replace the QD fitting at the back of the intake manifold; it was leaking. The concern was whether the fitting would unscrew or break off in the manifold. Luckily it came out.
Tools used: 1 1/16" deep well socket, 1/2" drive universal joint, 4" extension for drive, air impact wrench throttled way down with the adjustment dial.
Caution: use of a universal joint on air tools can be hazardous to your health. It will fly apart without warning or throw the socket.
Started very carefully with minimum torque setting that just vibrated the tool with no rotation. Carefully "Kicked it up a notch" and the fitting backed out. A right-angle air wrench probably would have worked better, without the universal. My opinion is the small impacts remove stubborn fittings with less chance of breaking them off than using a regular ratchet.
Replacement is a brass nipple described as "3/4 BARB x 1/2 MPT brass male adapter - 84169 48452" from Lowe's. The fitting accepts 5/8 heater hose. This installs with a 7/8" deep well socket and teflon based pipe thread compound.
For the hose, I used a universal fit hose from NAPA, P/N 10077 ($ 14.69) that has a 3/4 opening on one end and quickly tapers down to 5/8 hose, ending with a right angle. I ended up cutting off the right angle about 4" before the bend, and just using the straight piece of hose that adapts diameters. There's probably a less costly hose out there. Secured with Tridon brand clamps from NAPA. So far so good.
I also had to replace the upper radiator hose to try and stop a leak at the radiator. I didn't see any cracks or other damage that would explain the leak. Will find out soon if that fixed it.
I took photos and will try to put some in an on-line album like FB does.