wow, must be a new england thing. I've owned dozens of these cars, currently own 3 260 cutlasses, all have come with a 5 blade clutch fan.
7 blade fan good upgrade?
- Thread starter MrSony
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Car was built in Framingham, MA.
Maybe be a regional thing or??
AFAIK it's original, and no clutch either.
Maybe be a regional thing or??
AFAIK it's original, and no clutch either.
so i look in the 79 olds service manual, and i stand corrected, a 4 blade fan was available. i didn't even know that was available back then. diagrams don't specify with or without a/c. all mine have been a/c cars.
It was the non A/C option along with no shroud back in 1970. It ironic since it cools a lot better than the 5 blade clutch fan they put on later A/C cars. WanaBa442 does your non A/C 78 260 have a shroud? Later non A/C Oldsmobile V8 cars are rare from my experience.
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Not trying to give you crap, just curious as to what is going on. So you freshend up this engine, but did not over haul it. First it was getting hot. Then it blew a head gasket. You replaced the radiator along with the head gasket. You are having low oil pressure problems now, and it is still getting hot. Is this correct so far? Did you ever check the block or heads for cracks and flatness? Have you checked the pressure in the coolant system while running? A miss understatement people are doing is. Slapping stuff together and running it. Not a good idea, but a lot of people are doing that. There is a good reasons why we do complete over hauls. Not just to spend money. If you want a good running reliable engine that is what it takes. You get what you pay for. When you rebuild an engine everything needs to be checked and machined if need be. Sounds like to me you need to pull that engine and go through it or run it till it blows. I don't see your fan as your main problem.
The engine overheated last time due to the previous radiator being sh*t. It was frozen solid once, it arrived bent, and I maybe had too high psi of cap. I had a 16lb cap. idk if that was a problem creator. I gave the radiator as scrap to my friend, he took the plastic tanks off and there was some goop in the tubes as well as some were seemingly pinched shut. It blew a headgasket a week after getting to 280 (engine off, was 240~ before I pulled over) on the highway.
the oil pressure problems are unrelated. They stem from that shitty timing cover I got from TA (I've already talked to them about it, they just blamed me for setting it up wrong).
A lot of you seem to be overestimating my "heat" problem. It has a 195 stat in it, and it hangs out at about 210/215 at idle or low speeds. Get going, it will swing back down to 190*actually. Stop, comes back up. I was just wondering if having the 7 blade would eliminate the temp fluctuation. It doesn't overheat, the coolant doesn't percolate after shutdown anymore, the engine runs just as it did the day I rebuilt it a tick over 11,000 miles ago, as if the headgasket never blew.
the oil pressure problems are unrelated. They stem from that shitty timing cover I got from TA (I've already talked to them about it, they just blamed me for setting it up wrong).
A lot of you seem to be overestimating my "heat" problem. It has a 195 stat in it, and it hangs out at about 210/215 at idle or low speeds. Get going, it will swing back down to 190*actually. Stop, comes back up. I was just wondering if having the 7 blade would eliminate the temp fluctuation. It doesn't overheat, the coolant doesn't percolate after shutdown anymore, the engine runs just as it did the day I rebuilt it a tick over 11,000 miles ago, as if the headgasket never blew.
Everyone has their own opinion on what might work best for you but Just because one fan or radiator fixed someone else's issue doesn't make it a universal fix for every application and the only way to know for sure if a 7 blade fan will work for your application is by actually installing one.
It is a non-A/C car.
Also does not have a shroud, just the small top plate that covers just the top of the finger muncher.
Fan noise signals the mighty roar of the hungry beast as the Dualjet strains to feed the voracious appetite of all 260 cubic inches of awesomeness....
Yah, I figured no shroud was the case. Maybe the 4 blade and no shroud lasted till the last G body. There were quite a few non A/C cars in the late 60's, early 70's, probably was seen as a luxury then and more power robbing with the big A4 compressor. The HO, 442, W30, W31 had the heavy duty 7 blade with clutch and shroud. Yes, it made a difference on my 403 as well. As I said the vast majority in the G body era were A/C cars with the Olds V8, especially once the 260 was canceled, the cheap non A/C cars would be 3.8 cars. Just funny because the 5 blade clutch fan blows, it doesn't cool well at all and is a down grade from the 4 blade.
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