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 03-18-2012, 06:58 PM   #1
88A3507
Stock
 
Join Date: Feb 2012
Location: Denver, CO
Posts: 9
88A3507 is on a distinguished road
Default Bearing or exhaust leak?

http://www.youtube.com/watch?v=21lT_...ature=youtu.be

Hello,

I have an 88 Turbo. I just recently had the head rebuilt by a reliable shop, and I have driven it less than 500 miles since the rebuild. I started to drive to work Friday and heard this loud knocking sound. This is the only time I have started it since Friday. It seemed to be much more consistent on Friday, not clicking in little triplet bursts like it does in the beginning of the video.

The oil pan is full and the car wasn't driven more than 1/4 of a mile before it was parked and turned off. I checked the spark plugs and cables however I did not remove the spark plugs individually while the car was running to test if the knock gets quieter on a certain cylinder. I have read that it may possibly be an exhaust leak around the manifold but I don't see any improperly aligned or tightened bolts around the manifold.

I guess some car guys can just hear a knock from an exhaust leak right away, I cannot.

Opinions? I am prepared for a rebuild, just not as prepared as I would like to be...

'e = There is also no check engine light and I did not get any smaller clicks or warnings that a bearing wasn't aligned.
88A3507 is offline   Reply With Quote
Old 03-18-2012, 09:54 PM   #2
cre

Toyota
Racing
Development
 
cre's Avatar
 
Join Date: Apr 2007
Posts: 5,036
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

Given that you haven't had the bottom end apart there's fair chance that some of the studs in the head pulled loose. It's not common with old aluminum heads supporting very large and heavy exhaust structures... especially a turbo. I'm not going to speculate and definitely not based on a youtube video. Pull the plug wires one at a time. An exhaust leak will also quiet down but it won't go away.
__________________
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 03-23-2012, 02:41 PM   #3
88A3507
Stock
 
Join Date: Feb 2012
Location: Denver, CO
Posts: 9
88A3507 is on a distinguished road
Default

The car has 2 bad bearings. My mechanic told me after the head rebuild that there was some really heavy oil in the engine. The car was likely driven for some time on a blown head gasket and the bearings are shot.

I will be starting my motor rebuild plan now, something I had hoped to put off for about a year while I gathered parts.
88A3507 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
Exhaust leak at the E. Manifold Supra Saiyan MKIII Supra 4 07-23-2010 04:30 AM
Exhaust leak behind engine? vbryanv MKIII Supra 14 05-28-2010 02:59 AM
Exhaust system & components Krem MKIII Supra 6 05-27-2010 01:35 PM
Exhaust for 7MGE XtreeX MKIII Supra 19 03-25-2010 01:39 AM
Does the exhaust manifold need to come off to replace head gasket? BillW MKIII Supra 1 10-02-2009 01:19 AM


All times are GMT. The time now is 05:06 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, 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