Just as a follow up, we went for a short little drive today and the Hayden I
put on earlier this summer has apparently played out. It never roared, and I
was well into the 1/2 way mark on the gauge going up a little flat land
hill. I think I've been victim of Heinz's disease. At least it has a
'lifetime' warranty.
If you read below, keep in mind that the 15-4298 is no longer a good number
according to my AD/Delco jobber.
Mike Linderman, is the 15-4644 a good number?
Mark
_/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/
FWIW - I'll cross post this from the Toro mailing list ---
Toro-ites:
I recently drove my '67 Toro to LA on a weekday and during that particular
day, temperatures ranged from the high 90's to low 100's. I watched my
temperature gauge quickly creep toward the 1/2 mark and stay there while at
the same time I experienced pinging and lot's of off idle hesitation (vapor
lock I would presume).
I discovered that my fan clutch was no longer operable. So with a little
research, I found an original GM replacement clutch that is by far GM's most
stout fan clutch out there. The box shows 2 part numbers: #15-4644 &
#12529772. It is designed for GM diesel vehicles but is perfect for these
big blocks. I drove to Sacramento this past week with temperatures in the
90's and I heard it kick in and out frequently. NOT ONCE did it go above
the
1/4 mark on the temperature gauge and that was with the Air-conditioning on!
Ed
Ittlldo
_/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/
Just as a reference, Paul Bartz previously posted this info:
FWIW, here is some recent info on the subject from the Toronado mailinglist:
There is a heavy duty cooling fan clutch (Delco # 15-4298) which I have been
extremely pleased with. It was used on some of the third series Toros with
factory HD cooling. The front cover is a casting with fins and the overall
length is almost 1" greater than the standard clutch. No problem with the 3
core radiator, but I can envision problems with a 4 core.
I have had great success with this clutch and factory 6 blade (RWD HD
cooling) or 7 blade ('71-'78 Toro) fans and the 3 core radiators in my late
'70s full size cars. The clutch kicks in around 208 degrees on the coolant
temp gage. It also spins the fan at a higher % of the engine speed than the
standard clutches. The RPM based cutout is still reasonable, however, so
the car does not sound like a DC3 taking off like the aftermarket HD
clutches I have tried. Today I had 37 degree air out of the center vents
(Tempmatic A/C still running on R 12) on my '77 403 Delta 88, and the temp
gage never got over 210. This was in 97 - 99 degree weather and in DC
traffic.
Mark
put on earlier this summer has apparently played out. It never roared, and I
was well into the 1/2 way mark on the gauge going up a little flat land
hill. I think I've been victim of Heinz's disease. At least it has a
'lifetime' warranty.
If you read below, keep in mind that the 15-4298 is no longer a good number
according to my AD/Delco jobber.
Mike Linderman, is the 15-4644 a good number?
Mark
_/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/
FWIW - I'll cross post this from the Toro mailing list ---
Toro-ites:
I recently drove my '67 Toro to LA on a weekday and during that particular
day, temperatures ranged from the high 90's to low 100's. I watched my
temperature gauge quickly creep toward the 1/2 mark and stay there while at
the same time I experienced pinging and lot's of off idle hesitation (vapor
lock I would presume).
I discovered that my fan clutch was no longer operable. So with a little
research, I found an original GM replacement clutch that is by far GM's most
stout fan clutch out there. The box shows 2 part numbers: #15-4644 &
#12529772. It is designed for GM diesel vehicles but is perfect for these
big blocks. I drove to Sacramento this past week with temperatures in the
90's and I heard it kick in and out frequently. NOT ONCE did it go above
the
1/4 mark on the temperature gauge and that was with the Air-conditioning on!
Ed
Ittlldo
_/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/ _/
Just as a reference, Paul Bartz previously posted this info:
FWIW, here is some recent info on the subject from the Toronado mailinglist:
There is a heavy duty cooling fan clutch (Delco # 15-4298) which I have been
extremely pleased with. It was used on some of the third series Toros with
factory HD cooling. The front cover is a casting with fins and the overall
length is almost 1" greater than the standard clutch. No problem with the 3
core radiator, but I can envision problems with a 4 core.
I have had great success with this clutch and factory 6 blade (RWD HD
cooling) or 7 blade ('71-'78 Toro) fans and the 3 core radiators in my late
'70s full size cars. The clutch kicks in around 208 degrees on the coolant
temp gage. It also spins the fan at a higher % of the engine speed than the
standard clutches. The RPM based cutout is still reasonable, however, so
the car does not sound like a DC3 taking off like the aftermarket HD
clutches I have tried. Today I had 37 degree air out of the center vents
(Tempmatic A/C still running on R 12) on my '77 403 Delta 88, and the temp
gage never got over 210. This was in 97 - 99 degree weather and in DC
traffic.
Mark
