Fordmods Logo

AUIII XR8 Broken Value Sping Replacement Advice 

 

Page 1 of 1 [ 9 posts ] 

 
 Post subject: AUIII XR8 Broken Value Sping Replacement Advice
Posted: Mon Apr 11, 2011 1:03 pm 
Fordmods Newbie
Offline

Posts: 12

Joined: 29th Dec 2009

Ride: el ghia

Location: melbourne
VIC, Australia

Recently broke a valve spring on my AU III XR8 220 kw (100k on the clock). The heads are off and luckily there is no damage.

Is it true these springs are prone to failure? Is there a replacement i should investigate whilst the heads are off?

Cheers John
Top
 Profile  
 
 
 Post subject: Re: AUIII XR8 Broken Value Sping Replacement Advice
Posted: Mon Apr 11, 2011 1:12 pm 
Getting Side Ways
Offline

Age: 27

Posts: 736

Joined: 13th Oct 2009

Gallery: 5 images

Ride: EL XR6

Location: Parramatta
NSW, Australia

Engine information?
What were you running that caused you to break a valve spring?
I dont think that is a "normal" issue by any means. Something has caused it to give out.

 

_________________

LOW, LOUD AND LUMPY

Top
 Profile  
 
 
 Post subject: Re: AUIII XR8 Broken Value Sping Replacement Advice
Posted: Mon Apr 11, 2011 1:12 pm 
Getting Side Ways
Offline

Age: 27

Posts: 736

Joined: 13th Oct 2009

Gallery: 5 images

Ride: EL XR6

Location: Parramatta
NSW, Australia

double post

 

_________________

LOW, LOUD AND LUMPY

Top
 Profile  
 
 
 Post subject: Re: AUIII XR8 Broken Value Sping Replacement Advice
Posted: Mon Apr 11, 2011 1:34 pm 
Getting Side Ways
Offline

Age: 29

Posts: 4182

Joined: 30th May 2005

Ride: 1993 EB XR8

Location: BrisVegas
QLD, Australia

It's a common issue on cars with GT40P heads.

 

_________________

ILL60 - EF XR8, Sunroof, Ticky Kit, 19x8.5/19x11 TE37's, 347, AFr185's, TFS BoxRcustom converter, Hurst Quarterstick, huge billet cam.

51TER - DL LTD. Stock.

Top
 Profile  
 
 
 Post subject: Re: AUIII XR8 Broken Value Sping Replacement Advice
Posted: Mon Apr 11, 2011 1:45 pm 
Getting Side Ways
Offline

Age: 27

Posts: 736

Joined: 13th Oct 2009

Gallery: 5 images

Ride: EL XR6

Location: Parramatta
NSW, Australia

67RCE wrote:
It's a common issue on cars with GT40P heads.


Is this only relating to stock valve springs?

 

_________________

LOW, LOUD AND LUMPY

Top
 Profile  
 
 
 Post subject: Re: AUIII XR8 Broken Value Sping Replacement Advice
Posted: Mon Apr 11, 2011 1:46 pm 
Fordmods Newbie
Offline

Posts: 12

Joined: 29th Dec 2009

Ride: el ghia

Location: melbourne
VIC, Australia

car is completely standard and trouble free - no noises, knock, rattles or anything to suggest here is a more serious issue. I ahve heard its a GT40P issue but was wondering if a) thats correct and b) is there a fix?
Top
 Profile  
 
 
 Post subject: Re: AUIII XR8 Broken Value Sping Replacement Advice
Posted: Mon Apr 11, 2011 1:48 pm 
Getting Side Ways
Offline

Age: 27

Posts: 736

Joined: 13th Oct 2009

Gallery: 5 images

Ride: EL XR6

Location: Parramatta
NSW, Australia

Could it be something to do with the rocker gear?
May just be an old spring going brittle and throwing in the towel. Might want to check the rest of them while your there to make sure that they arent on their way out either...

 

_________________

LOW, LOUD AND LUMPY

Top
 Profile  
 
 
 Post subject: Re: AUIII XR8 Broken Value Sping Replacement Advice
Posted: Mon Apr 11, 2011 2:18 pm 
Fordmods Newbie
Offline

Posts: 12

Joined: 29th Dec 2009

Ride: el ghia

Location: melbourne
VIC, Australia

the sam wrote:
Could it be something to do with the rocker gear?
May just be an old spring going brittle and throwing in the towel. Might want to check the rest of them while your there to make sure that they arent on their way out either...


Heads are completely apart and being re-done. All the springs are going in the bin. Have heard a few folk say its a common GT-40P problem. This being the case just wondering if there is an aftermarket solution or do I just get the spings replaced every 50,000 k's?
Top
 Profile  
 
 
 Post subject: Re: AUIII XR8 Broken Value Sping Replacement Advice
Posted: Mon Apr 11, 2011 4:40 pm 
Getting Side Ways
Offline

Posts: 699

Joined: 1st Jan 2006

Ride: Lots, all Fords

Location: Hamilton
New Zealand

This is a common problem, but was mainly limited to the 200kW AU2's. When they changed the cam profile for the AU3 XR8's they also changed the springs to a Crow item, and the failure rate was supposedly eliminated. The spring to retainer fit was still very poor as you will have noticed.

When I overhaul these engines I throw away the crap retainers, locks & springs and replace with my own combination of crane retainers (99936's from memory) and a comp single spring with damper that gives about 130lbs seat pressure and 350+ open.

This is reliable past 6000rpm.

 

_________________

XA Faimont 351C, AU2 XR8 Manual 5.0, DA LTD 5.0, Mk1 Capri 5.0, 1995 Mustang 5.0, EF2 XR8 Manual, EF2 Fairmont Ghia 5.0, AU3 XR8 Auto, AU2 XR8 Auto, AU2 XR8 Manual Ute, TE Cortina 5.0 Manual, DU LTD 5.0 soon to be manual

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 9 posts ] 

Who is online

Users browsing this forum: No registered users and 11 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Fri Dec 15, 2017 2:28 am All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names