I've installed a generic one-size-fits-all (after much modification) fan shroud for my SV200 (with 6 cylinder Ford engine). The fan blade is inside the circular portion of the shroud except for about an inch. Would it be a good idea to make an extension for the shroud so the whole fan blade is inside? (Would it cool better?)
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Fan Shroud Extension?
- Thread starter snowbird
- Start date
I would agree with BigAl here.
Speaking from my experience with jeeps the principle is the same however.
Many fans are not completly cover by the shroud in production. But most of them them are usually cover about 2/3's of the blades.
One thing you may want to check is if you have space along along the radiator top or sides that would allow air from the engine bay to be sucked into the front of the rad. It is much better to use fresh incoming air to cool a rad than heated air from the engine bay.
I have used additive in my antifreeze to increase the heat transfer and have had good results.
Speaking from my experience with jeeps the principle is the same however.
Many fans are not completly cover by the shroud in production. But most of them them are usually cover about 2/3's of the blades.
One thing you may want to check is if you have space along along the radiator top or sides that would allow air from the engine bay to be sucked into the front of the rad. It is much better to use fresh incoming air to cool a rad than heated air from the engine bay.
I have used additive in my antifreeze to increase the heat transfer and have had good results.
I'm not so sure having the blades completely inside the shroud is as important as making sure you don't have any air leaks between the shroud and radiator. I was surprised how much of a difference a small gap can make. I had a bear of a time keeping the 572ci big block cool in a car with the A/C on. I literally had to seal off every single gap, no matter how small, and thin out my concentration of antifreeze as much as I dare along with adding Water Wetter [ame="http://www.amazon.com/Red-Line-80204-Water-Wetter/dp/B000CPI5ZK"]Red Line Water Wetter[/ame]. The higher concentration of ethylene glycol you have, the less efficient your radiator is. You just need to make sure you have enough of a mixture to prevent it from freezing.
I appreciate your input.I think I'll put some silicone caulk around the perimeter of the radiator-shroud contact to seal it more airtight (there's already a pretty good fit).
That's a good and cost effective approach. Hopefully it works for you. I was really surprised at how small of a gap was making the difference between keeping mine in check and allowing it to spiral upwards.
NO<NO<NO!!!!I appreciate your input.
Do not use silicone caulk . Go to the hardware store and buy some "one sided sticky" foam weather stripping tape . It comes in all sizes and thickness and will work much better and look much more professional
I assumed he meant high temp caulk. Depending on the place it's needed, it can be okay. However, without seeing where he needs it, I cannot disagree with you. From experience, not just any foam tape will work. It has to be able to handle temps of at least 250 degrees. And, yes, they do make such an animal.
Does the silicone caulk ignite? I used it to seal some gaps left when I attached the round portion of the shroud to the portion that goes up against the radiator. I'd better scrape it off if it might cause a fire!
Check the tube. It should tell you a temp range for the material. Unless you like to live on the edge, about 250 degrees is about all you need.
I looked at the tube and I was wrong; it's a latex sealant rated for 50 years. I got it at a Lowe's store, so it was probably intended for houses. It doesn't show a temperature maximum rating. Where I used it wasn't right up next to the radiator, but to seal some gaps between the "tunnel" on the shroud and the angled metal that fits next to the radiator. Maybe it doesn't get that hot in that area.
I tried the suggestion of seeing how much suction there is in the grill and I was able to suspend a wool-lined leather mitten with the engine at fast idle.
(This was without attempting to seal right between the shroud and the radiator).
I tried the suggestion of seeing how much suction there is in the grill and I was able to suspend a wool-lined leather mitten with the engine at fast idle.
(This was without attempting to seal right between the shroud and the radiator).
You should be fine ! Go have some fun !!!I tried the suggestion of seeing how much suction there is in the grill and I was able to suspend a wool-lined leather mitten with the engine at fast idle.