Any Idea What this Noise Is?
- Thread starter Jessedio
- Start date
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- 100 series lx470
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2001LC
SILVER Star
I suspect fan bracket. But camera moving around a little to much for my eyes. PM me if you'd like stop by 80121, I'll take a look!
Fan hitting cracked fan shroud? Look for a shiny new worn spot on the shroud once you turn off the car.
I think it is the fan bracket too, it is moving back and forward. Remove the drive belt and spin just the fan by hand and see any resistance.
- Thread starter
- #5
Just wanted to give an update for the issue in the video. 2001LC and nissanh were spot on with their diagnosis. It was the Fan Bracket. I appreciate you all pointing me in the right direction fellas.
Apparently it was missing the bottom long bolt that goes in sideways on the fan bracket. Of course, I didn't realize this until i bought a new bracket from napa and took everything apart to reach the bracket..lol I'm assuming the mechanic who did the timing belt last did a s***ty job and didn't tighten that bolt enough or maybe It just came loose from vibrations over the last year. Who knows.
Ace hardware didn't have the exact size bolt but I got one a little longer and stronger. The bolt Toyota used was grade 8 and the I got was grade 10 according to ACE. I added blue thread lock and really tightened it into that awkward space.
Not sure if this was addressed in another thread but the easiest way to reach that bottom bolt on the fan bracket is from the bottom. You just remove this little bracket and build a super long extension 1 by 1 so you can get some leverage to torque down. So start with a flex head socket. Place it on the bolt and then add a small extension. and add another and then another and then your rachet.
I hope this helps anyone with the same thumping sound. First thing first is to check and see if your bottom bolt is intact before going out and buying the new part as I did.
Anyway, the vehicle sounds great now!
Apparently it was missing the bottom long bolt that goes in sideways on the fan bracket. Of course, I didn't realize this until i bought a new bracket from napa and took everything apart to reach the bracket..lol I'm assuming the mechanic who did the timing belt last did a s***ty job and didn't tighten that bolt enough or maybe It just came loose from vibrations over the last year. Who knows.
Ace hardware didn't have the exact size bolt but I got one a little longer and stronger. The bolt Toyota used was grade 8 and the I got was grade 10 according to ACE. I added blue thread lock and really tightened it into that awkward space.
Not sure if this was addressed in another thread but the easiest way to reach that bottom bolt on the fan bracket is from the bottom. You just remove this little bracket and build a super long extension 1 by 1 so you can get some leverage to torque down. So start with a flex head socket. Place it on the bolt and then add a small extension. and add another and then another and then your rachet.
I hope this helps anyone with the same thumping sound. First thing first is to check and see if your bottom bolt is intact before going out and buying the new part as I did.
Anyway, the vehicle sounds great now!
2001LC
SILVER Star
Happy it all worked out for you.
Unfortunate few shop do any job on the 100 series by the book. Number 1 I find done wrong is wheel bearings.
Work done by shops like: INDY shop such as BrakePlus, Midas, Firestone, tire shop, windshield installer, etc. Where techs have no business touching a 100 series unless supervised every minute. A Dealership where primary concern is beating book time. Or a so called ToyLex specialty shop that will not allow clients to speak with mechanic must less in the shop. Is why & what I spend so much time bring back to factory spec.
FWIW:
Non Aisin (OEM) never good idea. @cruiseroutfit is good source for OEM parts, without the Toyota logo or high cost.
Longer bolt is risky, you can bottom out. OEM is always best practice.
Steel bolts in aluminium is where I like a touch of Anti-sizes.
Really tightening down, not a great idea. When lubing threads, which blue LT does. We are required to reduce torque by ~20% where a thread "lube" not called for by the book. Torque specs take into account heat expansion. The fan bracket has four different torque specs; 12, 15, 24 & 36ft-lbf IIRC. FSM is a must when working on the 100 series. It is also best practice to snug in all bolts of fan bracket first. Then torque in bolts and nuts on face second. Torquing in the two side bolt coming through compressor last.
He may have also forgot or just not:
Torque in any bolts or nuts.
Likely forgot to pre-coat with FIPG (103 oil) the tensioner pulley bolt.
Routed the crank sensor and oil pressure switch wire harness improperly.
Not used the correct FIPG 1282B on water inlet.
Wrongly used FIPG on large O-ring.
Forgot the covers circled in red.
A little grease added here is helpful for future removal. The fan clutch will be next to go. They don't tend to last much longer then 5K to 10K after fan clutch wobble
Unfortunate few shop do any job on the 100 series by the book. Number 1 I find done wrong is wheel bearings.
Work done by shops like: INDY shop such as BrakePlus, Midas, Firestone, tire shop, windshield installer, etc. Where techs have no business touching a 100 series unless supervised every minute. A Dealership where primary concern is beating book time. Or a so called ToyLex specialty shop that will not allow clients to speak with mechanic must less in the shop. Is why & what I spend so much time bring back to factory spec.
FWIW:
Non Aisin (OEM) never good idea. @cruiseroutfit is good source for OEM parts, without the Toyota logo or high cost.
Longer bolt is risky, you can bottom out. OEM is always best practice.
Steel bolts in aluminium is where I like a touch of Anti-sizes.
Really tightening down, not a great idea. When lubing threads, which blue LT does. We are required to reduce torque by ~20% where a thread "lube" not called for by the book. Torque specs take into account heat expansion. The fan bracket has four different torque specs; 12, 15, 24 & 36ft-lbf IIRC. FSM is a must when working on the 100 series. It is also best practice to snug in all bolts of fan bracket first. Then torque in bolts and nuts on face second. Torquing in the two side bolt coming through compressor last.
He may have also forgot or just not:
Torque in any bolts or nuts.
Likely forgot to pre-coat with FIPG (103 oil) the tensioner pulley bolt.
Routed the crank sensor and oil pressure switch wire harness improperly.
Not used the correct FIPG 1282B on water inlet.
Wrongly used FIPG on large O-ring.
Forgot the covers circled in red.
A little grease added here is helpful for future removal. The fan clutch will be next to go. They don't tend to last much longer then 5K to 10K after fan clutch wobble
2001LC
SILVER Star
No problem. If you'd ever like to stop-by, I'll look it over. You'll be surprised at what I'll find. 
Well done guys!
