2000 GTP engine noise - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Pontiac When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 08-17-2014, 12:45 PM   #1
Junior Member
Thread Starter
 
Join Date: Aug 2014
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
bowtienut is on a distinguished road
Default 2000 GTP engine noise

I have a 2000 GTP with 185k miles. It has developed an engine noise that makes an "ERCH" sound about every 1.5 to 2 seconds at idle. the noise will speed up when the RPM is increased. The noise seams to be coming from somewhere around the #1 cylinder to the middle of the intake. I have taken off all of the belts off and started the engine and it makes the same noise. I originally thought it would have something to do with the timing chain since the noise frequency was slower than engine RPM speed. If it was a bearing I think it would be a lot faster or continuous. Any help would be appreciated.
bowtienut is offline   Reply With Quote
Old 08-17-2014, 02:07 PM   #2
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Can you shoot a video of this and post it to Youtube?
Mike is offline   Reply With Quote
Old 08-17-2014, 02:34 PM   #3
Junior Member
Thread Starter
 
Join Date: Aug 2014
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
bowtienut is on a distinguished road
Default

I currently have it disassembled down to the timing chain. There is no significant wear or slack in the chain.
bowtienut is offline   Reply With Quote
Old 08-17-2014, 02:37 PM   #4
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Could have saved you the work.
Mike is offline   Reply With Quote
Old 08-18-2014, 08:12 PM   #5
Junior Member
Thread Starter
 
Join Date: Aug 2014
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
bowtienut is on a distinguished road
Default

Engine is back together. Attached is the you tube video of the car running without the belts on.
bowtienut is offline   Reply With Quote
Old 08-18-2014, 09:14 PM   #6
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

That is a really weird noise. A noise I never heard before.

Time to get the auto stethoscope out and poke and prod.
Mike is offline   Reply With Quote
Old 08-18-2014, 11:33 PM   #7
Junior Member
Thread Starter
 
Join Date: Aug 2014
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
bowtienut is on a distinguished road
Default

did the stethospoce and it is the loudest around the #1 cylinder and under the supercharger snout on the manifold.
bowtienut is offline   Reply With Quote
Old 08-19-2014, 06:03 AM   #8
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Your balance shaft bearings are right under the snout.

The least amount of work to inspect it would be removing the */C, and the LIM. Then you should be able to grab the balance shaft and check for lateral/axial play in it.

Worst case scenario, it is possible to completely remove the balance shaft.
Mike is offline   Reply With Quote
The Following User Says Thank You to Mike For This Useful Post:
WilliamE (08-19-2014)
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Valve train noise gtp 94cutlassvert Pontiac 7 02-10-2013 07:56 PM
Engine Noise 2000 SSEI imbuddha 2000-2005 24 03-27-2007 12:20 PM
2006 G6 GTP Making Squeaking Noise - Driving Me Nuts jgrakla Pontiac 2 05-13-2006 11:51 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -4. The time now is 05:04 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.