74 BB with A/C radiator hose clamp question

[Victor S.]

Hi All -

The 73-74 NCRS judging manual states LS-4 A/C cars have a total of six SURE-TITE clamps for the upper and lower hoses. I'm assuming two size 28 clamps on the top hose. The manual states that size 32 was used on the lower hose because of the metal tube in the lower hose. So do four clamps go on the lower hose - if so where do they go along the length of hose? Four clamps seem excessive.

Interestingly, my 74 assembly manual shows two size 28 on the top hose and a 28 and one 32 on the bottom - for a total of four clamps for the two hoses - seems like conflicting information - not sure which is correct

Thanks very much for any help clearing this up.

[Mark E.]

Re: 74 BB with A/C radiator hose clamp question

Does your '74 have a metal tube in the middle of the lower hose? I know most if not all 68-72 big block AC cars do. The tube provides more clearance with the tip of the fan.

If yes, 1 clamp for the water pump inlet, 1 for the radiator outlet, and 1 clamp for each end of the tube.

[Russ S.]

Re: 74 BB with A/C radiator hose clamp question

Yes Mark. 74 LS4 with air use the metal tube in line.

Does your '74 have a metal tube in the middle of the lower hose? I know most if not all 68-72 big block AC cars do. The tube provides more clearance with the tip of the fan.

If yes, 1 clamp for the water pump inlet, 1 for the radiator outlet, and 1 clamp for each end of the tube.

[Victor S.]

Re: 74 BB with A/C radiator hose clamp question

Thanks Guys - much appreciated!!