Pictures of air flow deflectors for the radiator
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On the 260 yes, it probably is. The timing definitely isn't retarded. As long as I figure it out and get as much air flow as possible for next season. I plan on swapping it in the 88 late this fall.
I don't know if this will make sense, but where on the engine is the sending unit for your temperature gauge? The reason I ask, is because I used to have a similiar condition on my '84 Monte SS. On hot days, or during a long highway drive, especially with the A/C on, the temp gauge would show that the car was close to overheating (Around 100C to 105C. Yes, its a Canadian car.). The sending unit is in the left (driver's side) cylinder head. After trying a larger rad, without much improvement, I installed an Edelbrock water pump. According to their advertising, its more efficient, and the temp gauge did read lower after I installed it.
Then, a few years ago, I installed a serpentine belt setup on the car to replace the original V belt accessory drive. The serpentine system I installed came off an '88 Firebird, and with the GM system, you need to install a reverse rotation water pump and fan. After I installed the serpentine setup, the readings on my temp gauge are significantly lower than before. The theory that I have is, depending on where the sending unit for your gauge is located, you may not be getting an accurate reading of the actual temperature of the engine in all areas of the engine, and, depending on the direction of flow of coolant within the engine, the reading on your gauge can vary. I have no way to confirm my theory, but its the only thing that makes sense to me, after what I've experienced.
I hope this is helpful.
Then, a few years ago, I installed a serpentine belt setup on the car to replace the original V belt accessory drive. The serpentine system I installed came off an '88 Firebird, and with the GM system, you need to install a reverse rotation water pump and fan. After I installed the serpentine setup, the readings on my temp gauge are significantly lower than before. The theory that I have is, depending on where the sending unit for your gauge is located, you may not be getting an accurate reading of the actual temperature of the engine in all areas of the engine, and, depending on the direction of flow of coolant within the engine, the reading on your gauge can vary. I have no way to confirm my theory, but its the only thing that makes sense to me, after what I've experienced.
I hope this is helpful.
Temp gauge sender, better in the head or intake?
This is another thing I've been toying with & not sure which spot would give better readings (even though it's a factory gauge.) The old 305 had it in the head, the original 229 obviously had it there too. Then when I had my '72 put to gether my '68 307 had the mechanical gauge probe in the...
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Being an Olds V8, only one option, it is in the intake to the right of the thermostat. Like I said, I believe according to a temp gun, the gauge reads 10 degrees high. Even so, still too hot. I will take a peak under there this morning, still trying to picture where they go. On my 70 they sit up near the top ends of the rad.
I opened my eyes and looked under the hood, they are both in place 100%. I could try and find a replacement for the bottom one. I will take a pic of my repair.
After I took my grilles out of the 85 442 so I could take a picture (was going to do that eventually anyway...).
There's 3 Christmas tree push pins mounting them to the radiator support and go between the "X" support mounting spots. The two little holes near each other on the other end of the flap zip tie to the bumper shock absorber. Never mind the screen. I put that in sometime in the summer of 1985. Didn't want bugs smashing up the A/C coil fins. Works pretty well, actually.
Mine looks the same as that. They look in very good shape. The bottom lower dam below the crossmember had an impact hole. I cut part off a universal chrome fan shroud and bolted it on.
Yes, I realize that but the 260 and 307, which I have also ran super lean in other vehicles, never ran this warm. They have much thicker cylinders and therefore better cooling than the 350 and especially the 403 and 455.
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