Radiator Swap problems....solution?
#11
06-26-2016, 02:51 PM
I bet there's a Ford or GM part that'll fit right up; which one, I do not know.
Biggest problem with that Powermaster pulley is that you DO need some dish to it, just not as much as your current pulley has.
I'm going to bet that it turned out to be more economic to use a different water pump and pulley than to redo the motor mounts, the rear transmission mount, and the driveshaft, is why they used a different one for 1990. And that they had some left over for them to use in 1991.
Heh. The South Shreveport site for the local U-Pull-It chain ( uapi.biz ) has a 1991 5.2; their Alexandria chain has a 1991 5.2 also. I may stick my head in tomorrow afternoon if I can get someone to take the wife to her doctor's appointment Monday and see if they have the pulley. (I wouldn't use the old water pump off either; new ones are still too cheap for something that's as critical as the water pump is.)
RwP
Biggest problem with that Powermaster pulley is that you DO need some dish to it, just not as much as your current pulley has.
I'm going to bet that it turned out to be more economic to use a different water pump and pulley than to redo the motor mounts, the rear transmission mount, and the driveshaft, is why they used a different one for 1990. And that they had some left over for them to use in 1991.
Heh. The South Shreveport site for the local U-Pull-It chain ( uapi.biz ) has a 1991 5.2; their Alexandria chain has a 1991 5.2 also. I may stick my head in tomorrow afternoon if I can get someone to take the wife to her doctor's appointment Monday and see if they have the pulley. (I wouldn't use the old water pump off either; new ones are still too cheap for something that's as critical as the water pump is.)
RwP
I appreciate the help on the J/Y look see, but please take your wife to her doctor's!! The build can wait lol
#12
06-26-2016, 03:05 PM
Just for future reference, in case this thread helps anyone else out, I was able to find the spec's for the hub height for the two water pumps. The standard LA one is 5.56 inches. The 90 5.2L version is 3.86 inches. That's a savings of 1.7 inches and should be enough I think. So.....I have to find a pulley that is 1.7 inches shallower than the standard LA pulley to put the grooves in the same place.
#13
06-26-2016, 03:44 PM
Ford Windsor 351 looked promising but the bolt pattern spacing is wrong. Chrysler is 2.06" bolt circle and the Ford is 1.75".
But, I found that the Chrysler BB pulley might just do the trick. Same Bolt spacing, pilot diameter of 5/8". CVF website lists an overall length of 3.1" for the SB to 2" for the BB, but I have no idea what overall length refers to, as the SB pulley is deeper than 3.1". It's about 3.25".
But, I found that the Chrysler BB pulley might just do the trick. Same Bolt spacing, pilot diameter of 5/8". CVF website lists an overall length of 3.1" for the SB to 2" for the BB, but I have no idea what overall length refers to, as the SB pulley is deeper than 3.1". It's about 3.25".
Last edited by robertmee; 06-26-2016 at 03:55 PM.
#14
06-26-2016, 03:57 PM
Champion
It's to the opthamologist / optometrist (the one that can do laser surgery, never can remember which is which) and it's to check how her diabetes is affecting her right eye, a scheduled appointment.
RwP
#15
06-26-2016, 04:11 PM
so, from the above numbers I drew the arrangement up in CAD. Not sure it will work:
SB LA = 5.56 water pump, 3.1" pulley
BB with 3.86 water pump, 2" pulley
Yields the goove location with a difference of .6" too close to the block. So, I'd have to run a .6" spacer, which would eat back into my 1.7" of clearance, yielding only a clearance of 1.1". That might be too close
I need a pulley with depth of 1.4" to match up exact.
SB LA = 5.56 water pump, 3.1" pulley
BB with 3.86 water pump, 2" pulley
Yields the goove location with a difference of .6" too close to the block. So, I'd have to run a .6" spacer, which would eat back into my 1.7" of clearance, yielding only a clearance of 1.1". That might be too close
I need a pulley with depth of 1.4" to match up exact.
#16
06-26-2016, 04:31 PM
Think I found it...Same diameter, same bolt pattern and pilot diameter. And it's only 1.75" deep if the ebay seller is to be believed 
It's a part # 2202666 and it came on 87 D100 to D350 trucks. Pretty much came in any slant 6 vehicle up to 87. Plugging that into my cad drawing that reduces the spacer to 1/4" which spectre makes.
It's a part # 2202666 and it came on 87 D100 to D350 trucks. Pretty much came in any slant 6 vehicle up to 87. Plugging that into my cad drawing that reduces the spacer to 1/4" which spectre makes.
Last edited by robertmee; 06-26-2016 at 05:06 PM.
#17
06-29-2016, 03:46 PM
Well.....The Shelby water pump showed up today, and it doesn't fit. The lower radiator outlet is at a different angle and runs right into the timing cover mechanical fuel pump boss. Strange, because when I look up the timing cover for a 5.2L 90 Dak vs any 70-80 360 LA timing cover, they are exactly the same on rock auto. Pretty sure all LA V8 timing covers are the exact same, unless the shelby had something different. Looks like I might have to go with a cut down radiator and recess it into the core.
#18
07-04-2016, 01:22 PM
#19
07-05-2016, 12:06 PM
That's interesting, it would mean the accessories and belts on the Shelby are possibly different than any other LA motor thru '91.
#20
07-05-2016, 12:13 PM
True....if you look at the spec's from RockAuto, LA pumps say clockwise, and the Shelby Pumps say counter clockwise. I have both pumps in my hands, and the vanes are opposite for pushing the water. I've tried to find a clear picture of a Shelby engine belt configuration, but the AC compressor on a Shelby sits right on top of the water pump and you can't see anything.
Last edited by robertmee; 07-05-2016 at 12:42 PM.