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 BT 20V Tensioner : From Hydraulic to Manual [Archived]First  1 2 >  Last
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MayanWarrior


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3273 posts [96%]
925 CA

 BT 20V Tensioner : From Hydraulic to Manual Reply  Edit


Gonna start makin these and don't wanna give out secrets

Soooooooorrrrryyyyyy!

Modified by MayanWarrior at 4:16 AM 1/24/2011



who can? the mexi-CAN!
I'm not a ricer, I'm a beaner


Gabriel82
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407 posts [100%]
Los Angeles CA

  » Reply  Edit


Nice write up!
Reminds me of my old machine shop skills lol
Keep us posted on this..
will this work on a 20V ST?




Raul & Gabriel Gonzalez
email: raul_gonzalezjr@yahoo.com, gonzalezgabe7@gmail.com
323/909/626 area SOCAL

DIY 86 Dash Refurbish - Rubberized http://forums.club4ag.com/zerothread?id=52963
www.steerandsave.com

PM or email pls... thnx!

MayanWarrior


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3273 posts [96%]
925 CA

  » Reply  Edit


Thanks!

This will NOT work on st 20v since it is a spring tensioner



who can? the mexi-CAN!
I'm not a ricer, I'm a beaner
VitriumGTS




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4730 posts [96%]
San Jose/San Diego CA

 Re: (Gabriel82) » Reply  Edit


silvertops share similar tensioner setup as 16v. This baby is specific to the blacktop oil pump

nice write up! let us know how it goes



My RHDJapan.com receipt said: "Your order # is: 100001986". The AE86 gods really are looking out for me.
pato10
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59 posts [100%]
Costa Rica

 Re: (MayanWarrior) » Reply  Edit


man this is a excellent option!

but why did your valves bent? stock 4ag is supposed to be a non interference engine isn`t it?

BKH808
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921 posts [95%]
Honolulu HI

 Re: (pato10) » Reply  Edit


Blacktop IIRC is interference.



http://bkh808.wordpress.com/
MayanWarrior


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3273 posts [96%]
925 CA

 Re: (pato10) » Reply  Edit


Quote, originally posted by pato10 »
man this is a excellent option!

but why did your valves bent? stock 4ag is supposed to be a non interference engine isn`t it?

When my 16v belt broke, nothing happened with valves and pistons. A friend said Silver Top 20v is non interference as well.

I didn't know about BlackTop and unfortunately I found out the hard way

ALL my exhaust valves bent. That's some pictured. A friend who's black top snapped a belt as well said his Connecting Rod bent too



who can? the mexi-CAN!
I'm not a ricer, I'm a beaner
BKH808
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921 posts [95%]
Honolulu HI

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Jesus, thats rough. Where did you find replacement valves?



http://bkh808.wordpress.com/
pato10
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59 posts [100%]
Costa Rica

 Re: (MayanWarrior) » Reply  Edit


that hurts!

i always tought in a 4ag if the timing belt fails nothing would happen to the internals, guess ill be more carefull with it.

Grant
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3656 posts [86%]
San Jose ca

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blacktop only! Or if you change the pistons out to make the other 4ag's an interference design.

FYI, the reason companies "upgrade" to the hydraulic tensioner is to allow for belt stretch after installed, and to allow for the expansion of the block and head when the temps go from -10 to running temperature in cold climates.

That being said, you would want to re-check the belt tension every now and then, but this is an excellent mod if the stock tensioners have been failing for a lot of people.

Excellent write-up, I learned more about machining techniques!



Stand Alone ECU tuning. Message me for details.

Looking to buy a corolla manual rack and a TRD 3 gear transmission.
*also wtb 4 point roll cage/bar for ae86 coupe

GtsTone23




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3595 posts [99%]
Chicago IllaNoise

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Very Nice write-up. How's the R&D going?



"Behind every Successful Man lies a Pack of HATERS,
If they aint Hating Now, They'll be Hating Later"
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choi0706
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217 posts [100%]
TEXAS TX

 Re: (GtsTone23) » Reply  Edit


+1

I'm looking to purchase one!

superfreestyle
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106 posts [91%]
Brookhaven MS

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start selling these please
MayanWarrior


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3273 posts [96%]
925 CA

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I apologize for ignoring the previous posts.

For R&D, I can comfortably say that its holding up well so far.

Test 1: I drove it 2 hours to a friends and 2 hours back, taking it easy with Freeway cruising. I checked the slack and it stayed consistent.

Test 2: Took car on a trailer to All Star Bash X in SoCal and beat it up on track for 2 days! That's 2nd gear and 3rd gear redline, bouncing it off the tack. Checked the tension on the belt every couple sessions and it stayed consistent (whew)

Test 3: Took it to a local track and made 2nd gear and my rev-limiter hate life again with constant abuse. Checked belt tension and stayed consistent and NOTHING backed out of place.

It is save to say that it has taken the constant abuse of bouncing off the limiter and it held tension at a constant. Now, I'm still sensitive to the idea that the Black Top is an interference motor and would feel GREATLY at fault if one of my units were to fail since it is an expensive and time consuming failure if it were to break.

With that, I can not offer any guarantee other than my current experiences that the tension did not loosen and the bolts did not back out. I have a piece of mind ON MY OWN vehicle, but the daily life some of your Corolla's see would greatly put it to a test.

With all that said, how many of you are still interested? What would you pay for a product like this? I do not have any spare hydraulic tensioners so I would need you to send one in. Any comments/opinions/anything is appreciated.

With that, I leave you with a video of the most recent test my Tensioner went through

http://www.vimeo.com/13524887



who can? the mexi-CAN!
I'm not a ricer, I'm a beaner
ayee420
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2108 posts [100%]
san bruno ca

 Re: (MayanWarrior) » Reply  Edit


Wheres mine? I'll pay and I have two more core to start up your production but i need one done. Saving my RSK one for the other motor build i'm doing.







ayee420
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2108 posts [100%]
san bruno ca

 Re: (BKH808) » Reply  Edit


Quote, originally posted by BKH808 »
Jesus, thats rough. Where did you find replacement valves?

Supertech valves sell it for 20v





VitriumGTS




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4730 posts [96%]
San Jose/San Diego CA

  » Reply  Edit


i'll look for the same long specialty fastener that rsk uses shouldn't be too hard to find. I'd like to know asap when your doing this luis lol



My RHDJapan.com receipt said: "Your order # is: 100001986". The AE86 gods really are looking out for me.
runkillerrabbit
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490 posts [98%]
yorba linda ca

  » Reply  Edit


id pick one up for sure too +1



im totallllllly nub

ronny
RnD Office - Ronny



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7077 posts [89%]
Irvine CA

 Re: (runkillerrabbit) » Reply  Edit


i will definitly buy one.

=D



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redking
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323 posts [100%]
Manila

 Re: BT 20V Tensioner : From Hydraulic to Manual (MayanWarrior) » Reply  Edit


any updates on this? I'm every eager on this



My wallet is like an Onion. When I open it, It makes me wanna cry.
ayee420
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2108 posts [100%]
san bruno ca

 Re: BT 20V Tensioner : From Hydraulic to Manual (redking) » Reply  Edit


this is my DIY on the tensioner. It's my first time writing a DIY so... bare with me

To replace the timing tensioner, crank and water pump pulley need to be removed and all 3 front engine cover will also be removed.

This is the pic of the stock factory self adjusting tensioner. Before removing the tensioner, IT'S IMPORTANT TO SET IT TO TDC!!! ( top dead center ) don't take the chance of it will not jump on you. As for my security, I ziptied the timing belt in the mid part where the idler pulley were just to make sure.

This is the pics of both tensioner. Factory stock tensioner to the left and the luis version of manual tensioner.

Before installing the manual tensioner, Put some loctite on the thread and the set screw.

Once it's installed, set the tension on the timing belt as close to factory. This is my measurement before removal of the factory tensioner.


on my measurement is about 6mm slack with the stock factory tensioner so i set it mine 5mm, just 1mm less than before.

after setting my timing belt slack, it's time to lock the manual tensioner. Since the manual tensioner has a lock washer and i've put blue loctite, the amount of torque you'll need is not much. I'll say about 25 lbs to 35 lbs. Over torque may cause to much problem in the future like thread damage, can't removed it, or braking the housing of the tensioner etc. ect... Trust me... if you don't follow luis's instrutions... you can damage the tensioner which there is no warranty for stupidity.

I ran the motor for 30mins at idle, recheck the tension of the belt and the tensioner. drove the car around the my neighborhood for 20min and sorry no drifting yet... at least not in my area. My neighborhood knows my car so i can't do anything stupid with it. I recheck the tension and it's still at 5mm slack.

The next event that i'll be at is at infineon raceway sonoma drift which we will use turn 2 to turn 5 on may 29th. I will recheck the tension after that event. This is the closest event date i can go to test it. There are other events sooner than this like thunderhill rd 2 pro-am but i'm going to manila, philippines for a vacation and maybe compete at lateral drift.


Modified by ayee420 at 10:09 AM 5/9/2011





redking
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323 posts [100%]
Manila

 Re: BT 20V Tensioner : From Hydraulic to Manual (ayee420) » Reply  Edit


nice write-up sir.

after the conversion process will it still be a MAF system? im planning on running a dry shot nitrous system on it rather than going turbo.

and when will you be at manila? I've been spectating the lateral drift events going on here for some time now

Modified by redking at 4:08 AM 5/10/2011



My wallet is like an Onion. When I open it, It makes me wanna cry.
ayee420
Member



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2108 posts [100%]
san bruno ca

 Re: BT 20V Tensioner : From Hydraulic to Manual (redking) » Reply  Edit


This doesn't change anything to your wiring harness. Blacktop 20v use hydraulic timing belt tensioner and silvertop 20v use the same tensioner as the 16v. Since the BT 20v timing belt tensioner are not ready available here in the US, I think only a few shops that has it in stock like PASS racing/ K1 motorsport and so.

This is mainly to be a one time purchase of a tensioner rather than buying a new one every time you replace the timing belt. And the failure rate of using your old tensioner is pretty high especially when you use the car a lot on the track like myself, grip or drifting.

Going nitrous would save you more money than going turbo. I'm in the process of doing nitrous too. I'm actually leaving tomorrow for manila. i'll see you there!





full_lock 86
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376 posts [100%]
Tacoma WA

 Re: BT 20V Tensioner : From Hydraulic to Manual (ayee420) » Reply  Edit


pm'd




LSD, my anti drug
ayee420
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2108 posts [100%]
san bruno ca

 Re: BT 20V Tensioner : From Hydraulic to Manual (ayee420) » Reply  Edit


So after 2 day of rev bouncing in ASB XI i've checked the timing belt slack and it's still at 5mm. This part is in my book! Thanks luis!





VitriumGTS




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4730 posts [96%]
San Jose/San Diego CA

  » Reply  Edit


luis I still owe you money for the one you made. gonna be at 8/6 day right? Oh yeah, I should really convert the one you handed me to an allen screw



My RHDJapan.com receipt said: "Your order # is: 100001986". The AE86 gods really are looking out for me.
stockshortblock
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1263 posts [94%]

  » Reply  Edit


very funny followup post
redking
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323 posts [100%]
Manila

  » Reply  Edit


quick bump.

did you change the oil pump to an earlier model oil pump?



My wallet is like an Onion. When I open it, It makes me wanna cry.
ayee420
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2108 posts [100%]
san bruno ca

 Re: (redking) » Reply  Edit


No need to replace oil pump.

After ASB event, 3 stockton 99 speedway, 10 infineon race events! still same as the day i installed it!





redking
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323 posts [100%]
Manila

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where can I get this luis manual tensioner?



My wallet is like an Onion. When I open it, It makes me wanna cry.
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