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Discussion Starter · #1 ·
K, HERES THE DEAL, MY TIMING PULLEY ON MY 5M-GE (NOT THE CAMS OR CRANK PULLEY) IS WOBBLING AND CHEWING ITSELF UP, THERES METAL SHAVINGS ALL OVER THE TIMING COVER, AND ITS STARTIN TO EAT THE TIMING BELT. I THINK THE PULLEY RUNS THE OIL PUMP, BUT IM NOT SURE. I TOOK IT TO THE TOYOTA DEALERSHIP IN TOWN AND TO MAKE A LONG STORY SHORT THEYRE COMPLETE RETARDS. THE PRINT OUTS THEY GAVE ME DIDNT TELL ME MUCH. IS THEYRE LIKE A BEARING THAT NEEDS TO BE REPLACED, OR DO I NEED A NEW BLOCK, DOES THIS PULLEY RUN ANYTHING, CUZ THE PRINTOUT SHOWS SOME TYPE OF SHAFT BOLTING TO IT. ITS GOT ME SCRATCHIN MY HEAD, MY 11 SECOND COROLLA NEVER GAVE ME THIS MUCH HEADACHES. I GOTTA HAVE THIS THING FIXED BY CHRISTMAS, AS ITS A PRESENT FOR MY FIANCE, SO ANY AND ALL HELP\INFO WOULD BE VERY MUCH APPRECIATED. THANX
 

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first of all call caps is harder to read then all lowercase is. second of all there are 5 pullies that the timing belt run to. the idle pully which is really small, the two cam pullies, the crank pully, and the oil pump. it's prolly the oil pump pully and that can cause serious troubles. may wanna price a new pump and put it in.
 

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Discussion Starter · #3 ·
I knew i was gonna sound like a dumbass, im pretty sure its the oil pump pulley, and the inside of the teeth are chewed on the timing pulley. are there bearings for the oil pump shaft, or is my block screwed? in my print out it looks like theres a bearing or somekind of plate directly behind the pulley, is that whats bad? i guess what im trying to ask is, whats causing the pulley to wiggle as bad as it does. normally id just go tear into it, but im tryin to be smart about this. thanx
 

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There is a plate and I believe two bearings (memory shot due to drinking) and a gear at the end. The front side has about a 5-6' diameter toothed pulley. If that sounds like what you got, welcome to having yourself a bad set of oil pump driveshaft bearings. Oil pump will not be affected by this unless the gear is messed up. Uhm, can see once the pan is dropped I believe.

--BillyM
 

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Discussion Starter · #5 ·
that sounds like what i got. its funny how three days at the dealership and i get nowhere, but a couple minutes online and im hooked up. you guys rule. is there anything special im gonna need to do this? like special tools, or any tips or tricks to make it easier? im not new to a shop, just new to supras. so if its pretty straight forward, thats good for me, but if not id rather know now then when im knee deep in supra parts. thanx again for the info guys, its very much appreciated.
 

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There are two bearings that press into the block that the oil pump driveshaft spins in. They look just like camshaft bearings in ole school American V8. If you've destroyed these bearing you'll most likely have serious damage all over the motor from bad oiling. I don't believe I've ever heard of anyone having problems with these. Good luck trying to replace these with the engine in the car. Are you sure the bolt is tight on the pulley? Even if the bearing were worn you won't get a lot of play in the pulley. What you are saying really doesn't make sense. You have a hard steel timing gear and a soft rubber belt. How does a piece of soft rubber damage the steel teeth on a timing gear? The only thing I can think of is that someone replace the oil pump DS seal and uses a big pair of channeloks on the outside of the gear to keep it from spinning, hence the damage you see.
 

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Discussion Starter · #7 ·
if it made sense i wouldnt be on here asking about it, i would have fixed it. but the timing pulley is chewed on the inside edge, it almost sounds like something is loose in there and the noise comes and goes. the motor goes like hell, but every so often it starts rattling. i thought it was the fan clutch, then i thought it was the water pump, and this is where the search led me, so if its not this then i dont have a freekin clue what it is. maybe i just need a 7m-gte.
 

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Have you taken the top plastic cam cover off and looked? I think you can just see the large pulley your talking about . There is a small idler opposite that pulley with bearings that do go bad that create filings like you are describing .

Sounds like the pulley bolt could be loose . Normally that pulley never gives any problems unless someone else did not tighten the pulley bolt .The aluminum shavings could be comming from the hard pulley wobbling and rubbing against the softer back assembly... that wont hurt a thing. I think if it were me and that bolt was not loose.. then remove the lower crank belt pulley, get 2 new keys for the crank and the replace the 4 seals(2 cams crank and oil pump shaft) , and new timing belt and crank pulley bolt and take a good look at that pump shaft. it does comes out easy once the timing belt is off. There is no way even if the bearings were bad that it could wobble that much.. you would have oil pouring out that seal. My bet is the idler / tensioner bearings are bad. That would normally make a lot of noise.
I hope this helps.
 

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Mad_83,

With the top timing belt cover off, you still won't be able to see the oil pump pulley, all you'll be able to see, is the 2 cam pulleys & the top of the idler/tension pulley. The lower cover will need to come off as well.

I also don't think a bad tension pulley would cause the damage he is having on his oil pump pulley & timing belt, since the damage is occuring on the teeth driven side. The idler/tension pulley puts tension on the "outer" side of the timing belt (the "smooth" side of the belt, not the side w/ the teeth). As mentioned in the past, the idler/tension pulley is basically a giant sealed bearing (for those of you that skateboard & have taken apart you wheel's sealed bearings for cleaning, think of that, only 4X bigger). If anything, the pulley would seize from lack of lubrication, this IMHO would occur before it comes apart.

I'll admit, this one has me stumped as well... Pretty rare that the oil pump driveshaft bearings crap out, unless something has gone horribly wrong!!!
 

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Sounds to me like the belt surface on the oil pump drive sprocket may have been damaged by someone using a vice grip chain wrench ( or something similar) to hold the sprocket while they torqued the bolt. The gouged sprocket surface would tear up the timing belt in no time and make for one big mess. How about the cam sprockets! Are both belt guides on the cam sprockets facing opposite each other, or did someone install them incorrectly with both belt guides facing out or both facing in?? That would cause a big mess as well. If you have good eyesight, you can remove the top timing belt cover and get a glimpse at the surface of the oil pump sprocket with a flashlight. At any rate, it sounds like you need to take the complete timing belt cover off and do a thorough inspection.
 

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The more I think about this, the more I suspect that you're confusing the belt tensioner idler pulley with the oil pump drive sprocket. But if I'm wrong and the oil pump sprocket is indeed moving around and tearing things up, then you need to pull the timing belt covers ASAP and see what's going on.
 

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Discussion Starter · #13 ·
thanx for the info guys, it is very much appreciated. shes purring like a kitten. the dowel for my tensioner came out (is this normal, cuz normally stuff like that doesnt come out i though) rattled around inside the cover, and took out the retainer for the bottom timing pulley (crank), caused the damage on my oil pump drive pulley, and scored up my timing cover, everything except the cam pulleys is brand new, and my fiance is all smiles, thanx again guys.
 
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