Fan hitting bottom of new shroud.
#1
Fan hitting bottom of new shroud.
Hi everyone, I replaced the fan shroud on my 70 cut. 350 today and you can't even turn the fan by hand, it keeps hitting the bottom of the new from GM shroud PN#402995. I had noticed one of the previous owners had cut out the bottom of the OEM shroud #402995, now i know why. Has anybody seen this happen to there cars? I have a 19 inch fan and believe it is OEM. Motor mounts are still connected together, can they crush this far down?? Thanks
#2
Is the bottom of the shroud bolted and tightened to the tabs on the core support?
The reason I ask...not long ago I upgraded to a 4 row radiator. When I was test fitting everything I didn't have the bottom of the shroud bolted tight,just sitting loose,the fan hit the shroud while turning by hand. When I tightened the bolts,it all pulled together and did not hit anymore.
Just a thought I had.
The reason I ask...not long ago I upgraded to a 4 row radiator. When I was test fitting everything I didn't have the bottom of the shroud bolted tight,just sitting loose,the fan hit the shroud while turning by hand. When I tightened the bolts,it all pulled together and did not hit anymore.
Just a thought I had.
#3
Just an Olds Guy
Join Date: Jul 2008
Location: Edmonton, AB. And "I am Can 'eh' jun - eh"
Posts: 24,525
You can shim the shroud down from the top so the fan is more centered, thereby eliminating the need to cut any part of it. This is covered in the Assembly manual on SEction 11, page 110 (shroud 402995)
#7
I had the exact same problem with the new Gm fan shroud. Measure the new fan shroud opening and then compare it with the original one. I found the nos one to be 1/2 an inch smaller. I could not use it on my w31. I restored and and reused the original.
#8
My 19 inch fan has 6 blades and i cannot find a part number on it. How many blades is normal for this car? It looks like a factory GM fan but from what, i don't know. OPGI has "matching" OEM fan that is 17.5 inch and has 7 blades. I did not have the car for the first 41 years so it's past is starting to reveal itself to me. I will try not to let this car fool me agian.
#9
My 19 inch fan has 6 blades and i cannot find a part number on it. How many blades is normal for this car? It looks like a factory GM fan but from what, i don't know. OPGI has "matching" OEM fan that is 17.5 inch and has 7 blades. I did not have the car for the first 41 years so it's past is starting to reveal itself to me. I will try not to let this car fool me agian.
John
#12
I installed both mounts today. The fan is now clearing the shroud but is still very close. At least now I can make some modifications to the shroud where I could not before. Thanks for all the input.
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March 10th, 2009 11:37 AM