Home / Toyota Supra Forums

Go Back   Toyota Supra Forums! Join the Supra forum! > Performance, Modification, and Maintenance Forums - for generation specific discussions > MKIII Supra

Reply
 
Thread Tools Display Modes
Old 07-10-2007, 06:15 PM   #1
go.stfu
3" Exhaust
 
go.stfu's Avatar
 
Join Date: Nov 2006
Location: Atlanta, GA
Posts: 80
go.stfu is on a distinguished road
Default Timing belt is escaping!

So I'm driving along in front of a mexican in a neon'd-out El Camino pimped out with fuzzy dingo-balls when I hear a "cruhggrukurkukeherrr" (sp?).

He pulls along side me and I complement him on the fuzziness of his balls and then smile and point at his engine.

He smiles back and shakes his head. He then points at my engine.

So I turn down the euro-techno and realize that the sound was coming from my engine!!!!

So anyways... my timing belt seems to be slipping off. =/ (it's like 1/4 off)

Does this usually happen due to bad tensioners or is there something else I should be looking to replace?

Thanks for the info.
__________________
1985 manual (r.i.p) -- 1989 automatic (new)
http://www.cardomain.com/ride/2635827
go.stfu is offline   Reply With Quote
Old 07-10-2007, 08:10 PM   #2
supramacist
1000whp postwhore
 
supramacist's Avatar
 
Join Date: Apr 2007
Location: Escape from the Prison Planet
Posts: 1,356
supramacist is on a distinguished road
Default

Chances are you didn't get the pulley out to the propper 75 lbs of torque before you tightened it. I would check that before the tensioner.
supramacist is offline   Reply With Quote
Old 07-10-2007, 09:16 PM   #3
IHateHacks
20psi boost
 
IHateHacks's Avatar
 
Join Date: May 2006
Location: New Haven/Hamden
Posts: 793
IHateHacks is on a distinguished road
Default

Sounds like your crankshaft timing sprocket is messed up. The cogged pulley that goes on the crank behind the aluminum lower timing cover that the timing belt is driven by.

Nothing is torqued to 75ft/lbs down there. Crank pulley is 195ft/lbs and the timing belt tensioner is 36ft/lbs.
IHateHacks is offline   Reply With Quote
Old 07-11-2007, 01:21 AM   #4
supramacist
1000whp postwhore
 
supramacist's Avatar
 
Join Date: Apr 2007
Location: Escape from the Prison Planet
Posts: 1,356
supramacist is on a distinguished road
Default

I'll double check that in my tsrm. I could have swore it was 75 lbs because I was worried I didn't hit the mark.


If it's 36lbs, I'm golden.
supramacist is offline   Reply With Quote
Old 07-13-2007, 02:49 AM   #5
mrnickleye
1000whp postwhore
 
mrnickleye's Avatar
 
Join Date: Jun 2005
Location: Mojave Desert, Calif.
Posts: 1,705
mrnickleye is on a distinguished road
Default

The only reason the belt will move forward on the gears is because the "washer" that is part of the t-belt drive gear on the crankshaft has come loose from the gear.

The Toyota dealer can get you one over night for about $85.
Best to change the t-belt too, as it has now been damaged.

Better to NOT drive the car until fixed.
__________________
Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing.
TEMS, and some nice MODS. Sold to a friend 10/08/08.
mrnickleye is offline   Reply With Quote
Old 07-13-2007, 03:21 AM   #6
go.stfu
3" Exhaust
 
go.stfu's Avatar
 
Join Date: Nov 2006
Location: Atlanta, GA
Posts: 80
go.stfu is on a distinguished road
Default

I finally have everything taken apart.

The washer you speak of is the thin black ring that is set into the lower timing cover right?

Can I reattach it or do I have to replace the gear?
__________________
1985 manual (r.i.p) -- 1989 automatic (new)
http://www.cardomain.com/ride/2635827
go.stfu is offline   Reply With Quote
Old 07-13-2007, 06:31 AM   #7
suprra_girl
7M POWAH! ;)
 
suprra_girl's Avatar
 
Join Date: Jun 2004
Location: New Zealand
Posts: 2,312
suprra_girl has a spectacular aura aboutsuprra_girl has a spectacular aura about
Default

if i recall that timing gear should be a one piece unit, you will need a replacement

do everything while you're there since it's apart

crank seal and cams, timing belt, tensioner
__________________
Please use the forum to ask your questions as they will get replied to much faster than pming me

Pics of my build.

"Good girls are just bad girls that don't get caught"

Do a diagnostic first!
suprra_girl is offline   Reply With Quote
Old 07-14-2007, 10:38 PM   #8
mrnickleye
1000whp postwhore
 
mrnickleye's Avatar
 
Join Date: Jun 2005
Location: Mojave Desert, Calif.
Posts: 1,705
mrnickleye is on a distinguished road
Default

Yes. the t-belt crank gear comes as a one-piece item. Those 'washer' looking ends are put on at the factory with a machine. If you look very close (magnafying glass helps), you will see small crimps in the metal that hold those washers to the gear.

Mine did the same thing. I have lots of experience with 'out-in-the field', and home remedy repairs, so I spot-welded the washer onto the gear.

I don't recommend this procedure to everyone.
__________________
Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing.
TEMS, and some nice MODS. Sold to a friend 10/08/08.
mrnickleye is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Timing belt tensioner HELP ! lobosupra MKIII Supra 1 12-11-2008 11:52 PM
Broken Timing Belt detroitsupra MKII Supra 3 03-10-2008 11:06 PM
Photos of my timing belt Nato99 MKIII Supra 7 08-27-2007 09:33 PM
Timing belt... h8z2luze MKIII Supra 3 05-29-2006 01:52 AM
Timing belt rubbing against lower front cover adamh88 MKIII Supra 4 01-05-2006 11:08 PM


All times are GMT. The time now is 02:57 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

1986



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87