INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

Cam wear? Engine was knocking.

Thread Tools
 
Search this Thread
 
Old 11-29-2010, 09:04 PM
  #21  
TECH Addict
Thread Starter
iTrader: (5)
 
CashDudeHomie's Avatar
 
Join Date: Apr 2002
Posts: 2,911
Likes: 0
Received 1 Like on 1 Post
Default

Patriot Gold double springs. The heads and gaskets are completely stock. I bought the cam and pushrods as a kit. The kit came with 918s. I replaced the springs about every 16 months. The set in there now was only in for a few months.
Old 11-29-2010, 09:15 PM
  #22  
TECH Enthusiast
iTrader: (5)
 
black04silverado's Avatar
 
Join Date: Apr 2008
Location: Norman,OK
Posts: 503
Likes: 0
Received 0 Likes on 0 Posts
Default

Old 11-29-2010, 09:21 PM
  #23  
13 Second Truck Club
iTrader: (9)
 
grey matter 04's Avatar
 
Join Date: Jul 2008
Location: gonzales,LA
Posts: 1,455
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by CashDudeHomie
Patriot Gold double springs. The heads and gaskets are completely stock. I bought the cam and pushrods as a kit. The kit came with 918s. I replaced the springs about every 16 months. The set in there now was only in for a few months.
You had a good spring so it had enuff seat pressure
So the valve bouncing open and closed is out the question from lack of seat pressure
Old 11-29-2010, 09:27 PM
  #24  
PT's Slowest Truck
iTrader: (19)
 
budhayes3's Avatar
 
Join Date: Apr 2004
Location: Hackensack, NJ
Posts: 17,863
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by grey matter 04
You had a good spring so it had enuff seat pressure
So the valve bouncing open and closed is out the question from lack of seat pressure
Yep, but this brings up another point...there have been a few pics of cams both here and on tech with lobes that look like this, and they've all been with Patriot Gold duals...maybe something's up with those springs, not sure what it is. I'd say maybe too much seat pressure, but you'd think that a lifter would give first? Or it's just a coincidence that the three or so pics of cams that I've seen have all had Patriot Golds, they are a popular spring on higher lift applications...
Old 11-29-2010, 09:29 PM
  #25  
PT's Slowest Truck
iTrader: (19)
 
budhayes3's Avatar
 
Join Date: Apr 2004
Location: Hackensack, NJ
Posts: 17,863
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by black04silverado
What springs are you running?
Old 11-29-2010, 09:37 PM
  #26  
13 Second Truck Club
iTrader: (9)
 
grey matter 04's Avatar
 
Join Date: Jul 2008
Location: gonzales,LA
Posts: 1,455
Likes: 0
Received 1 Like on 1 Post
Default

Wer all the damaged cams made by comp cams?
From my understanding there was an issue with the heat treat process on some of there cams
Mine was covered under warrenty for that issue
Old 11-29-2010, 09:37 PM
  #27  
Tin Foil Hat Wearin' Fool
iTrader: (36)
 
1slow01Z71's Avatar
 
Join Date: Oct 2004
Location: Austin, TX
Posts: 23,204
Likes: 0
Received 4 Likes on 4 Posts
Default

Originally Posted by budhayes3
Yep, but this brings up another point...there have been a few pics of cams both here and on tech with lobes that look like this, and they've all been with Patriot Gold duals...maybe something's up with those springs, not sure what it is. I'd say maybe too much seat pressure, but you'd think that a lifter would give first? Or it's just a coincidence that the three or so pics of cams that I've seen have all had Patriot Golds, they are a popular spring on higher lift applications...
Billy, the picture that black04 posted looks exactly like the cam that I pulled out of my buddy's SSS and it was running patriot duals, closet red neck on here ran a 226/230 110 comp grind with patriot extreme duals and his had pitting starting on the ramp of the lobe, it only had 2K miles on it otherwise Im sure it owuldve looked much the same.

Ive been asking for a while about all these people running dual golds, as to what their cams look like and I must say like Ive been speculating it seems the springs are the common denominator. If you remember my post a while back in another section, I voiced this same concerned some months back

Last edited by 1slow01Z71; 11-29-2010 at 09:55 PM.
Old 11-29-2010, 09:41 PM
  #28  
PT's Slowest Truck
iTrader: (19)
 
budhayes3's Avatar
 
Join Date: Apr 2004
Location: Hackensack, NJ
Posts: 17,863
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by 1slow01Z71
Billy, the picture that black04 posted looks exactly like the cam that I pulled out of my buddy's SSS and it was running patriot duals, closet red neck on here ran a 226/230 110 comp grind with patriot extreme duals and his had pitting starting on the ramp of the lobe, it only had 2K miles on it otherwise Im sure it owuldve looked much the same.

Ive been asking for a while about all these people running dual golds, as to what their cams look like and I must say like Ive been speculating it seems the springs are the common denominator. If you remember my post a while back in another section, I voiced this same concerned some months back
Yep, I it was your post that has stuck in my head and has gotten me thinking

Last edited by 1slow01Z71; 11-29-2010 at 09:55 PM.
Old 11-29-2010, 10:00 PM
  #29  
TECH Resident
iTrader: (7)
 
brent5631's Avatar
 
Join Date: Nov 2006
Location: Dallas
Posts: 862
Likes: 0
Received 1 Like on 1 Post
Default

I don't want to hear that!
Old 11-29-2010, 10:09 PM
  #30  
Tin Foil Hat Wearin' Fool
iTrader: (36)
 
1slow01Z71's Avatar
 
Join Date: Oct 2004
Location: Austin, TX
Posts: 23,204
Likes: 0
Received 4 Likes on 4 Posts
Default

When I talked to a local speed shop(old school guys who know thier ****) they(all 3 guys) immediately said too much spring pressure. One setup was on stock lifters, one on the CTS-V racing lifters, and one was on LS7 lifters so that rules out lifter design IMO. Im running gold duals right now myself but Im probably going to swap to some PAC springs. Havent quite figured out what I want to do yet since Im not a fan of single springs since I dont really want to grenade my motor if a spring breaks.


Quick Reply: Cam wear? Engine was knocking.



All times are GMT -5. The time now is 06:05 PM.