Home
Don't have an account? Create one now! It's always free!


Forgot Password
Ed's Auto Parts - Mention MOTORGEN for a Discount!
Motorgen Sponsor: McLeod Racing
Motorgen Sponsor: American Muscle - Add style and performance to your Stang
Motorgen Sponsor: Hall Fabrication & Racing
Motorgen Sponsor: Injectors Plus - Performance Fuel Delivery Systems
Reply
Page 2 of 5 < 1 2 34 > Last »
 
Thread Tools
Old 10-25-2013, 01:42 AM   #11
DamianDamian is offline
Senior Member
 
Damian's Avatar
 
Join Date: Jun 2009
Posts: 2,509
Default
I didn't see any cracks on the manifold anywhere. Timing is computer controlled, but has no knock sensor (weird IMO).

The part that I don't understand is that #3 knocks ALL the time if I pull it's plug wire or disconnect it's injector. The only way I can get the knock to change is if I loosen the rockers. This is all during idle of course.
__________________
93 GMC Typhoon: new money pit/PITA. Now GT3788R powered.

Boost, because sometimes atmospheric pressure just isn't enough.

"If it has tit's or tires, you can be pretty sure your going to have problems with them..."
  Reply With Quote
Old 10-25-2013, 02:40 AM   #12
VettezukiVettezuki is offline
I, Vettezuki
 
Vettezuki's Avatar
 
Join Date: Feb 2006
Posts: 14,754
Default
Rod bearing on #3 rod. The slightly higher revs/load reveals slop in the tolerance?
__________________
Motorgen on
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Motorgen on
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Motorgen Project Car
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
(active)
Motorgen Project Car
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
(back burner)
  Reply With Quote
Old 10-25-2013, 07:52 AM   #13
94cobra69ss39694cobra69ss396 is offline
Fast & Filthy
 
94cobra69ss396's Avatar
 
Join Date: Jun 2008
Posts: 3,840
Default
Quote:
Originally Posted by Vettezuki View Post
Rod bearing on #3 rod. The slightly higher revs/load reveals slop in the tolerance?
That's what I think as well especially after the issue he had with bearings during assembly.
  Reply With Quote
Old 10-25-2013, 10:04 AM   #14
DamianDamian is offline
Senior Member
 
Damian's Avatar
 
Join Date: Jun 2009
Posts: 2,509
Default
That's what I thought but I plastigauged it with the new bearing and it was within spec.
__________________
93 GMC Typhoon: new money pit/PITA. Now GT3788R powered.

Boost, because sometimes atmospheric pressure just isn't enough.

"If it has tit's or tires, you can be pretty sure your going to have problems with them..."
  Reply With Quote
Old 10-25-2013, 10:08 AM   #15
94cobra69ss39694cobra69ss396 is offline
Fast & Filthy
 
94cobra69ss396's Avatar
 
Join Date: Jun 2008
Posts: 3,840
Default
If you still have the head off rotate the engine by hand and see if you feel anything catching. Also watch the #3 piston to see if rocks or does anything different than the rest.
  Reply With Quote
Old 10-25-2013, 10:51 AM   #16
DamianDamian is offline
Senior Member
 
Damian's Avatar
 
Join Date: Jun 2009
Posts: 2,509
Default
I did that when I first pulled the head off but I'll do it again. It rotates nice and smooth, which is making me lean towards the valves. I'll pull them out later today when my neighbor gets home from work.
__________________
93 GMC Typhoon: new money pit/PITA. Now GT3788R powered.

Boost, because sometimes atmospheric pressure just isn't enough.

"If it has tit's or tires, you can be pretty sure your going to have problems with them..."
  Reply With Quote
Old 10-25-2013, 04:29 PM   #17
DamianDamian is offline
Senior Member
 
Damian's Avatar
 
Join Date: Jun 2009
Posts: 2,509
Default
There is no movement with the piston as far as side to side goes. I also turned the crank to get #3 to start its downward stroke and pushed on the piston and it didn't move.
__________________
93 GMC Typhoon: new money pit/PITA. Now GT3788R powered.

Boost, because sometimes atmospheric pressure just isn't enough.

"If it has tit's or tires, you can be pretty sure your going to have problems with them..."
  Reply With Quote
Old 10-25-2013, 04:45 PM   #18
DamianDamian is offline
Senior Member
 
Damian's Avatar
 
Join Date: Jun 2009
Posts: 2,509
Default
Went back to the listing where I bought the head from and found this:

Details:
Brand new heavy duty stronger casting than factory
All parts are reconditioned factory pieces
Head is assembled with new valve seals
Head is complete and ready to install

Being that the parts are reconditioned, I wonder if they used something that wasn't good.
__________________
93 GMC Typhoon: new money pit/PITA. Now GT3788R powered.

Boost, because sometimes atmospheric pressure just isn't enough.

"If it has tit's or tires, you can be pretty sure your going to have problems with them..."
  Reply With Quote
Old 10-25-2013, 06:09 PM   #19
94cobra69ss39694cobra69ss396 is offline
Fast & Filthy
 
94cobra69ss396's Avatar
 
Join Date: Jun 2008
Posts: 3,840
Default
They check everything so I doubt it. Did you listen with a stethoscope before you took it apart to see if you could pin piont the knock?
  Reply With Quote
Old 10-25-2013, 06:57 PM   #20
DamianDamian is offline
Senior Member
 
Damian's Avatar
 
Join Date: Jun 2009
Posts: 2,509
Default
I tried to pinpoint it but wasn't able to. I just know it was internal and related to #3.
__________________
93 GMC Typhoon: new money pit/PITA. Now GT3788R powered.

Boost, because sometimes atmospheric pressure just isn't enough.

"If it has tit's or tires, you can be pretty sure your going to have problems with them..."
  Reply With Quote
Reply
Page 2 of 5 < 1 2 34 > Last »

« Previous Thread | Next Thread »


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
vB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -7. The time now is 03:19 AM.

Contact Us - Home - Archive - Top