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 02-09-2010, 09:36 PM   #1
bigd112
Stock
 
Join Date: Feb 2010
Location: lancaster pa
Posts: 9
bigd112 is on a distinguished road
Default knocking after 3000rpms?

i am new to this forum and i just bought a 1989 supra. the car had an engine swap (7mgte) and a tranny swap (r154) about 1.5 years ago. he use to drive it as a weekend car and the rest of the time it sat around. all that is done to it is a 3" down pipe and 3" catless exhaust, 2.0mm head gasket with arp headstuds 90foot bound. one day he stated it up and it knocked after 3500rpms or so. it doesnt sounds loud at all, i dont know what it could be, rod knocking is too deep and is real loud at all rpms and valve tap is constant and doesnt start at higher rpms. it sounds like it is coming from the back left of the motor(if you are sitting in the driver seat).

PLEASE HELP!! thanks!
bigd112 is offline   Reply With Quote
Old 02-10-2010, 12:36 AM   #2
mirage83
12psi boost
 
Join Date: Feb 2007
Location: Georgia
Posts: 359
mirage83 is on a distinguished road
Default

You seem to be operating under a misconception in regards to rod knock. It can and often does (especially when it's just starting the problem) only show up in specific rpm bands. It's not at all unusual for a GTE to knock in the rpm range you're talking about. Test drove a n/a once which did the exact same thing... idled beautifully, couldn't even feel it running. It even accelerated fine and was still quiet until a little over 3k rpm. Then I knew why the price on it was so great.

In a way you're lucky it's only in that rpm range, as it's probably not too bad at this point. Just don't drive it any more than you have to until you have it checked out. It's possible that pulling the oil pan and replacing the bearings on the #5 (or #6, can't recall) connecting rod will more-or-less fix it for you if you don't let it get any worse.
mirage83 is offline   Reply With Quote
Old 02-10-2010, 01:08 AM   #3
bigd112
Stock
 
Join Date: Feb 2010
Location: lancaster pa
Posts: 9
bigd112 is on a distinguished road
Default

Ok thanks. I wasn't too sure. The guy who I bought it from said that's what he thinks is wrong. Ok I will go ahead And take a look at them. Thanks!
bigd112 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
Knocking and now it doesn't start ma70Joe Non-Generation Specific Questions 4 09-19-2009 07:27 PM
engine makes knocking noise.. 88WhiteMKIII MKIII Supra 4 06-10-2009 09:09 PM
knocking around 2000-3000rpms Suprafreak MKIII Supra 11 03-24-2009 06:45 AM
engine knocking red_armie_soviet Non-Generation Specific Questions 1 09-28-2007 10:06 PM
funny knocking sound on 7mge Jeff_5_7 MKIII Supra 11 09-09-2007 01:22 AM


All times are GMT. The time now is 10:04 AM.


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