No spring in the lower hose and the suction of the water pump can lead to the hose collapsing, especially at high RPM.
No spring in the lower hose and the suction of the water pump can lead to the hose collapsing, especially at high RPM.General, the overheating was present before I switched to the electric fan/shroud combo, the water pump is a new Motorcraft one. The fans are only on or off there isn't high speed, the description states they flow 2300cfm, I'm assuming that's combined? I'm going to change my settings on the Holley to have both fans on at 190 and see if that makes a difference.
What would cause the lower hose to collapse?
The guy that wrote that article is incorrect. Under vacuum all the hoses collapse...not just the lower. When the thermostat is closed and the engine is revved the lower hose can collapse without the spring. The thermostat is the greatest restriction in a healthy system. Have you seen how small of a surface area they have ?I'll just leave this here:
https://www.martiauto.com/faqfocus.cfm?qid=20
You mean like this:The guy t
The guy that wrote that article is incorrect. Under vacuum all the hoses collapse...not just the lower. When the thermostat is closed and the engine is revved the lower hose can collapse without the spring. The thermostat is the greatest restriction in a healthy system. Have you seen how small of a surface area they have ?
We use Airlift coolant fill systems every day. My car had a brand new 3 row radiator but the lower hose would collapse and cause a flow issue. This is stated from experience, not a theory.
Never tried it without a thermostat.
Yup just like that. You should know better than accept that guy explanation. I get caught up in a quick search sometimes, too. The reason is because of hose collapse while the engine is running - not under vacuum during a fill. With vacuum fill all of the hoses collapse and refill with coolant. Most of the older cars had springs in the lower hoses because the rubber would get soft when hot coolant went through them. That softness and the suction from the water pump made the spring necessary.You mean like this:
Did you read post #47?Yup just like that. You should know better than accept that guy explanation. I get caught up in a quick search sometimes, too. The reason is because of hose collapse while the engine is running - not under vacuum during a fill. With vacuum fill all of the hoses collapse and refill with coolant. Most of the older cars had springs in the lower hoses because the rubber would get soft when hot coolant went through them. That softness and the suction from the water pump made the spring necessary.
https://www.motortrend.com/how-to/avoid-this-mistake-radiator-hose-collapse/
you must've typed that while I was typing mine. That's the question I asked myself too. That guy was just trying to act smarter than he was.Did you read post #47?
Just for the record; I run a Motorcraft hose as it comes with the spring. Gates doesn't.you must've typed that while I was typing mine. That's the question I asked myself too. That guy was just trying to act smarter than he was.
It also takes 2 seconds to spot on a sbf... $5 worth of radiator ties is too much I guess.head gasket orientation is quite important.
Installing a '97 A/C condenser in my 94-95 cars as it's less fin dense thus flowing more air.
I don't have a year range but be forewarned; many of the advertised units are not the correct one. There's a seller on Ebay that sells NOS '97 condensers. I just learned today that the LMR unit is supposedly the correct one. There's two versions...a piccolo style with dense fin count and the modern design with 16 fins per inch. If you Google '97 A/C condenser; you may find the NOS units on Amazon and Ebay. They are pricey though.Do you have a year range on that condenser? Is a 98' condenser ok? It looks like this might help me. I figured out one of my overheating problems. In the 90s we did this really stupid thing called under drive pulleys.
Kurt
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