Noob with 99 LX, just did TB/WP job!

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Jul 25, 2016
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Location
Melbourne Beach, FL
Hi everybody! First off, thank you to you all for being such a great resource in my adventure into the 100 series. I've saved a bunch of money and even more valuble time because of Mud and it is much appreciated.

I purchased a '99 LX from the origninal owner, local to me, whos wife was the main driver. It had newer tires, battery, brakes, a/c condenser, radiator, heater T's and associated hoses and what looks like a newer than 16 year old brake master. It had 217k miles and the matching wear and tear on both front seats but besides that, above average condition inside and out. The owner had no records availible but was very up front about repairs and work done and said anything it ever needed, it got due to it being his wifes vehicle. It ran, drove and shifted great. At $5500, I figured I couldn't really go wrong, so we did the deal.

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Got it home, gave it a bath, Mobil 1 5/30 and filter change. The next week, road tripped to visit family in New Orleans, 1500 miles round trip, to give her a shakedown and see how she does. On the way home, of course, midnight, middle of nowhere on I10, serpentine belt tensioner pulley seized and shredded the belt. Was able to drive to the next exit and find a hotel. It just so happened to be next door to an Advance Auto. Chalk another one up for timing belt driven water pump. Dayco 4" replacement pulley, new belt and was rolling again 20 minutes after Advanced opened in the morning and made it home.

That pulley bearing failure made me start questioning the condition of everything else under the hood that spins and moves, so I pulled the passenger side TB cover to check out its condition...

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Uhhhhh, a BIG thank you to Mitsuboshi for making such badass original TBs! Promptly hopped on Amazon and purchased the Aisin TB/water pump kit, new Toyota serp tensioner, idler, and an Aisin (OE) fan bracket.

TB And water pump replacement was pretty smooth minus this...

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After having the coolant changed to green at one point in its life, it appears it may have been the only time it was ever flushed. The corrosion and build up at all hose connections was nasty and it froze the joint from the thermostat housing to the water pipe it plugs into. Had to mini hacksaw a relief into the broken peice and then was able to pry it out. Found a local replacement from a low mileage Tundra.

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Flush your damn coolant people! I figure this is the original water pump. The nuts and bolts didnt have a single mark or indication they have ever been touched. Either had the crank bolt.

Everything went back together without issue and I didnt even have any leftover 'bonus bolts'. Over all, it wasn't too difficult of a job, just time consuming. Bit of a learning curve since I've never wrenched on anything with a timing belt before but its just all nuts and bolts.

Thanks again for everybody sharing their past experiances and helping guide us noobs down the right path! Looking forward to many years and miles of service. I should have bought one of these things 10 years ago. I friggin love this thing. :beer:

-Andrew
 
Welcome!! I bet those heater T's disintegrated on removal. And original water pump @ 217k miles. Job well done TOYOTA job well done..:clap:
 
Welcome - almost neighbors - had much the same experience with the LX I bought (mine was a little bit rougher) - still fixing things - just about all there now.
 
...
Everything went back together without issue and I didnt even have any leftover 'bonus bolts'. Over all, it wasn't too difficult of a job, just time consuming. Bit of a learning curve since I've never wrenched on anything with a timing belt before but its just all nuts and bolts.
...
-Andrew

Thanks for sharing. Some day I'll have to deal with the Timing Belt in my 2002.
Glad to hear you feel its a do-able project.
 
Good job. Now check the fluid condition and level of your AHC system. If the wrong coolant type was in the radiator, you might also have 'other' fluids that are incorrect. Once you get your LX 'base-lined' you'll love it. Check the AHC system for proper fluid level, type and function NOW, it can be quite expensive to repair.
 
So...... what you are saying is a timing belt will last 217,000 miles?

I bought a LX that had managed to cover 219,129 miles without a TB or water pump change...but I wouldn't recommend that interval.
 
So...... what you are saying is a timing belt will last 217,000 miles?
I'm saying, apparently mine did. Will another one last that long? Probably not.

I searched real quick and the belt I removed was one of the worst non-failed belts I saw. Rumor has it, Toyotas requirement to the belt supplier was that it should be able to last double the recommended 90-100k service interval. If thats actually true, 200k was really pushing it. Do NOT, ever, take a timing belt that far. Just look at the pic! It's amazing it didn't snap.

AHC fluid is in good shape. A little dirty but is still clear. 11 graduations between hi/low. I already have 2 cans of new AHC fluid on the shelf, next to 7qts of Mobil 1 75w90 LS Synthetic to change the diffs and t-case. Probably should check heights and pressures and adjust accordingly after the flush. Hopefully can make the time this weekend.

Thanks for the kind words and welcomes!
 
I bought a LX that had managed to cover 219,129 miles without a TB or water pump change...but I wouldn't recommend that interval.
Not to one up you but my official number was 220,973. :p

So here is 2 examples that live within 10 miles of eachother. I'm really curious how many 4.7s have gone 200k+ on original tb. Between 100s, 4Rs, Tundras and Sequoias... its probably a much higher number than we think it would be. Toyota durability and reliablity at its finest.
 
Timing belt failure is most often the result of a pulley or tensioner seizing up, which then takes out the belt. Most belts replaced at under 150K still look pretty good.

Sounds like you are on top of the maintenance needed and base-lining the vehicle. Good job!
 
Thank you for sharing your experience. I am afraid to say this lack of concern for maintenance on an expensive vehicle is probably common:confused:
 
I bought a LX that had managed to cover 219,129 miles without a TB or water pump change...but I wouldn't recommend that interval.

Had a 4Runner 3.4 that went 207k miles on original. I changed it immediately after I bought it and it looked exactly like OP's TB, all cracked.
 
A year in, finally changed fluids in the transfer case and diffs. All 3 looked good and minimal build up on magnetic drains.

Had the battery fail about 6 months ago.

Uh, thats it.

Just changed the oil again for the 3rd time. Think we're at 238k now. Nothing short of awesome.
 
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Missed this thread at initial post, love the white early gen 100 LX's. Any major updates? Tires? AHC issues? Any adventures take place?
Nice looking truck!
 

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