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 05-14-2010, 01:10 AM   #1
batmmannn
12psi boost
 
batmmannn's Avatar
 
Join Date: May 2010
Location: West Virginia
Posts: 320
batmmannn is on a distinguished road
Default Supra died on test drive

Well I got the 86 going and did a little light test drive it was doing OK with old gas and the like and had been resurrected after many years of sitting. I was doing about 20mph just driving around my neighborhood taking it easy on it when it suddenly sputtered and died. I walked to a friends house we came back and jumped it cause I had a weak battery in it and it didn't fire at all not even a pop.

Kept trying to start it and then the motor started turning fast like it had no plugs in it at all while trying to start it. Like just then it lost all compression. I pulled it back home and parked it.

Any ideas? Broken timing belt? Clogged fuel filter? Loose plugs? Any idea why it would suddenly start turning over very fast under starter power like it had no compression? Blown head? Weird! Doesn't make sense that all the rings could go bad at once. If the timing belt broke would it spin fast under the starter load? I had oil pressure and it was running at the correct temp.

Any help would be greatly appreciated. Thanks
__________________
1987 N/A 7MGE Left Hand Drive MK3 Red 5 Speed and Black Auto Supras
My Next project is the Batmobile!


Last edited by batmmannn; 05-14-2010 at 01:13 AM.
batmmannn is offline   Reply With Quote
Old 05-14-2010, 01:18 AM   #2
907mge
20psi boost
 
907mge's Avatar
 
Join Date: Dec 2009
Location: Harrisburg
Posts: 759
907mge is on a distinguished road
Default

As long as that thing sat in the woods. I would start by rebuilding the engine since you are going to have problem after problem. Every hose, vaccuum line and gasket has a very high chance of leaking.

Last edited by 907mge; 05-14-2010 at 01:21 AM.
907mge is offline   Reply With Quote
Old 05-14-2010, 01:26 AM   #3
batmmannn
12psi boost
 
batmmannn's Avatar
 
Join Date: May 2010
Location: West Virginia
Posts: 320
batmmannn is on a distinguished road
Default Curious

It sat in the driveway not actually in the woods. I just read that an engine spinning like no compression during attempted starting could mean a broken timing belt. but I heard nothing like the valves being slapped. Is th 7mGE a non interference engine? If a timing belt breaks does that roach the head? Thanks
__________________
1987 N/A 7MGE Left Hand Drive MK3 Red 5 Speed and Black Auto Supras
My Next project is the Batmobile!

batmmannn is offline   Reply With Quote
Old 05-14-2010, 01:52 AM   #4
907mge
20psi boost
 
907mge's Avatar
 
Join Date: Dec 2009
Location: Harrisburg
Posts: 759
907mge is on a distinguished road
Default

It should be fine since it is a non inter. motor. That does make sense since half your valves are probably open. It most likely broke since the gears are rusted and the belt is dry rotten. It won't be fun doing the timing belt since you have to get the drive pulley off first that was torqued to 195lbs and it probably is now rusted in place. I'd start by pulling off the upper timing cover to take a look at the belt. I think it has about 6 bolts in it.
907mge is offline   Reply With Quote
Old 05-14-2010, 02:15 AM   #5
batmmannn
12psi boost
 
batmmannn's Avatar
 
Join Date: May 2010
Location: West Virginia
Posts: 320
batmmannn is on a distinguished road
Default I hear ya

The crank bolt I usually let the starter take care of that, wedge a braking bar and then hit the starter to pop the bolt loose I figure you are right. I did my other Supras timing belt a few years ago and it is also an MK3 so if I had to do anything at least I know how to do this repair. I was just looking for a thread here to refresh my memory. I have a manual but it sucks it covers too many years. All I really need to know is how to line up the cams and the bottom. I guess I will start on it tomorrow. Probably exactly what happened. I was planning on doing this anyway.

I WAS SO RELIEVED when I read that the motor is non interference. Whew! This will be about another $50 buck max out of my pocket which isn't too bad.

Why did they ever go to belts anyway? Seems stupid when chains are so much more reliable.
__________________
1987 N/A 7MGE Left Hand Drive MK3 Red 5 Speed and Black Auto Supras
My Next project is the Batmobile!

batmmannn is offline   Reply With Quote
Old 05-14-2010, 02:54 AM   #6
907mge
20psi boost
 
907mge's Avatar
 
Join Date: Dec 2009
Location: Harrisburg
Posts: 759
907mge is on a distinguished road
Default

Belts are generally said to be more quite and less expensive. My 2000 celica has a chain though. Everything you need is in here....


http://www.cygnusx1.net/Supra/Library/TSRM/MK3/
907mge is offline   Reply With Quote
Old 05-14-2010, 03:04 AM   #7
batmmannn
12psi boost
 
batmmannn's Avatar
 
Join Date: May 2010
Location: West Virginia
Posts: 320
batmmannn is on a distinguished road
Default Allrighty Then!

Hey Thanks! This is great! A manual on line pint out the page you need and rock on! Get too much grease on the sheet just print a new one....AWESOME!
__________________
1987 N/A 7MGE Left Hand Drive MK3 Red 5 Speed and Black Auto Supras
My Next project is the Batmobile!

batmmannn is offline   Reply With Quote
Old 05-14-2010, 03:16 AM   #8
batmmannn
12psi boost
 
batmmannn's Avatar
 
Join Date: May 2010
Location: West Virginia
Posts: 320
batmmannn is on a distinguished road
Default Radiator?

Do you usually pull the radiator when doing a timing belt? I always have but this manual does not mention it. I guess I just like having the extra room to work. Also it keeps the radiator safe from slipped wrenchs or the like. Do you do yours with or without the radiator in place?
__________________
1987 N/A 7MGE Left Hand Drive MK3 Red 5 Speed and Black Auto Supras
My Next project is the Batmobile!


Last edited by batmmannn; 05-14-2010 at 03:25 AM.
batmmannn is offline   Reply With Quote
Old 05-14-2010, 04:04 AM   #9
cre

Toyota
Racing
Development
 
cre's Avatar
 
Join Date: Apr 2007
Posts: 5,038
cre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond reputecre has a reputation beyond repute
Default

Pull the oil cap off and shine a light in while someone cranks the engine. You'll see the #1 intake cam lobe moving if the belt is intact.
__________________
If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum.

If you're so inclined I'm always more than happy to accept tips via PayPal.
Tip Jar --->
cre is offline   Reply With Quote
Old 05-14-2010, 04:20 AM   #10
batmmannn
12psi boost
 
batmmannn's Avatar
 
Join Date: May 2010
Location: West Virginia
Posts: 320
batmmannn is on a distinguished road
Default Great Idea

Thats even easier than pulling the top cover! Thanks!
__________________
1987 N/A 7MGE Left Hand Drive MK3 Red 5 Speed and Black Auto Supras
My Next project is the Batmobile!

batmmannn 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
My Supra died today :( Sinistral MKIII Supra 3 01-22-2008 12:58 AM
Dream Offer Karma_Supra MKIV Supra 22 10-17-2007 03:04 PM


All times are GMT. The time now is 12:55 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