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Fan hit radiator with 1 1/2-1 3/4 clearance. How?????
- Thread starter Fant
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Lil-Pony
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I was using 94 stock clutch fan. The clutch had bout 1/4 gap frm radiator. Which puts blades 1 1/2 or little more away. Yet when i pulled the truck up on trailor whack. 2 blades dug in my 400 dollar duff radiator. I thought that was sufficient clearance. If i buy a older 302 fan and a spacer. What legnth spacer do i need for this to not happen again. Il already have damn near a grand in my cooling system now. I didnt have 10 min on my duff radiator. Idlin it did fine. Rev engine did fine. When truck went onto trailor ramps all hell broke loose. Plz inform me on what i did wrong
Lil-Pony
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Well evidently something moved. Any way you could get it back on the ramps again or lift the front to check clearance? Why only two blades hit, that's strange.
Dave
Dave
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I can't speak about any specifics here. Some general things.
Radiator moved, you say it is down tight so maybe the engine moved forward? Anything funny with the motor mounts? Maybe from raised up position to down on suspension motor gets pushed forward?
Maybe under load fan blades deflected forward? There always will be some but I admit it seems like lots.
The fan clutch doesn't happen to operate based on fan pulling forward? I don't know how these specifically work but I seen stuff that does and could easily eat up a gap.
Just wild ideas
Radiator moved, you say it is down tight so maybe the engine moved forward? Anything funny with the motor mounts? Maybe from raised up position to down on suspension motor gets pushed forward?
Maybe under load fan blades deflected forward? There always will be some but I admit it seems like lots.
The fan clutch doesn't happen to operate based on fan pulling forward? I don't know how these specifically work but I seen stuff that does and could easily eat up a gap.
Just wild ideas
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Do you have a pic of your fan?
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Front cab mount bushings shot?
Cab can move a lot if they or the others are bad.
Cab can move a lot if they or the others are bad.
morse johnson
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Fant I ain't lol@u but dats some funny looking $hit...you must have something loose or going bad.
john93rangerstx
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body flex
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raptor support rotted out
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fan
1/4" on the fan clutch is way to close not just because it might hit but the fan doesnt work at its peak that close to the radiator, think about it, a fan pulls air thru, so stopped and reving the engine the fan blades want to go forward toward (load on blades back side) the front of the radiator, kind of wanting to pull the engine forward, like an airplane, now couple that with flex as your trying to load, and maybe a soft engine mounts or trans mount, and you get contact things that make it worse are the alloy fan blades they really flex if you look at any car with a mec. fan sys. there is at least 4" between the clutch hub and rad. core, also by not having a fan shroud you loose a lot of cooling capcity, cause your only drawing air at the fan area and not thru the whole core, I think there is a clutch hub with a shorter snout, cant remeber, and please dont use one of the clutchless flex-a-lite fans. I was working on a f150 with one and wihle I was reving the engine it thru a blade right thru the fender next to where I was standing, can you make a mount system to move the radiator back
1/4" on the fan clutch is way to close not just because it might hit but the fan doesnt work at its peak that close to the radiator, think about it, a fan pulls air thru, so stopped and reving the engine the fan blades want to go forward toward (load on blades back side) the front of the radiator, kind of wanting to pull the engine forward, like an airplane, now couple that with flex as your trying to load, and maybe a soft engine mounts or trans mount, and you get contact things that make it worse are the alloy fan blades they really flex if you look at any car with a mec. fan sys. there is at least 4" between the clutch hub and rad. core, also by not having a fan shroud you loose a lot of cooling capcity, cause your only drawing air at the fan area and not thru the whole core, I think there is a clutch hub with a shorter snout, cant remeber, and please dont use one of the clutchless flex-a-lite fans. I was working on a f150 with one and wihle I was reving the engine it thru a blade right thru the fender next to where I was standing, can you make a mount system to move the radiator back
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Any fan can chuck blades.
There was a guy in Omaha last year that was working on an S-10 and one caught him in the neck and killed him. Even the plastic ones crack and come apart.
There was a guy in Omaha last year that was working on an S-10 and one caught him in the neck and killed him. Even the plastic ones crack and come apart.
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Yeah but those flex fans are known for failing. I have known about it for the last 20 years at least.
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