Rising Sun Member Forums  

Go Back   Rising Sun Member Forums > Toyota 4x4 > General Tech Forum

Reply
 
Thread Tools
  #1  
Old 11-13-2008, 11:53 PM
PabloCruise's Avatar
PabloCruise PabloCruise is offline
Rising Sun Member
 
Join Date: Aug 2005
Location: Northern CO
Posts: 1,759
Default Camshaft - continuation from the List

From when the forum was down...

We were talking about camshafts and then followers, and then if the lifters should rotate.

Mine looked like this when I pulled the cam to fix my oil squirter leak...

Do you think someone forgot to regrind them when rebuilding the engine?
Attached Images
  
__________________
TJS

1978 FJ-40
1974 FJ-55 w/ 3FE

TLCA #10713

CO/WY Horsetooth 4 Wheelers Cruiser Club - Click Here!
Reply With Quote
  #2  
Old 11-14-2008, 06:43 PM
SROR/AKA 2BAD SROR/AKA 2BAD is offline
Hard Core 4+
 
Join Date: Sep 2006
Location: somewhere out there
Posts: 700
Default

they sure don't look like they rotate do they?
what does the cam look like?
Reply With Quote
  #3  
Old 11-15-2008, 01:02 PM
PabloCruise's Avatar
PabloCruise PabloCruise is offline
Rising Sun Member
 
Join Date: Aug 2005
Location: Northern CO
Posts: 1,759
Default

No, I don't think they are rotating...

Not sure if I got a pic of the cam. It looked acceptable when I was in there.
__________________
TJS

1978 FJ-40
1974 FJ-55 w/ 3FE

TLCA #10713

CO/WY Horsetooth 4 Wheelers Cruiser Club - Click Here!
Reply With Quote
  #4  
Old 11-22-2008, 09:25 PM
Rzeppa's Avatar
Rzeppa Rzeppa is offline
Cruise Moab Committee
 
Join Date: Aug 2005
Location: Kittredge CO, USA
Posts: 5,220
Default

WOW!

Clearly that lifter (er...follower?) has not been rotating. I would take an educated guess that it wasn't so much that it had not been ground, as it had not been ground with that slight arc, or possibly that there may have been some reason it wasn't being allowed to rotate in the block.
__________________
Jeff Zepp
Kittredge CO USA
1971 & 1976 FJ40s, 1978 FJ45, 1987 FJ60
Rising Sun 4WD Club, TLCA #4063
http://american3dprinting.net/
Reply With Quote
  #5  
Old 11-25-2008, 02:59 PM
Rogue Leader's Avatar
Rogue Leader Rogue Leader is offline
Lifted
 
Join Date: Nov 2007
Location: Mat-Su Valley, AK
Posts: 196
Default

On the topic of cam shafts and followers, does anybody know of a shop in CO that will regrind both? I called my machine shop and several others around town and the consensus was that there were no places in Denver anymore.
__________________
TODO ES POSIBLE, NADA ES SEGUNDO

MACINNES CLAN
Well we allready got one (holy grail)
I fart in your general direction
SEAN JONES KD0DHU

Fighting fire in the last frontier.
Reply With Quote
  #6  
Old 11-25-2008, 03:55 PM
Uncle Ben's Avatar
Uncle Ben Uncle Ben is offline
Rising Sun Member
 
Join Date: Aug 2005
Location: Louisville, Colorado
Posts: 13,148
Send a message via AIM to Uncle Ben
Default

Quote:
Originally Posted by Rogue Leader View Post
On the topic of cam shafts and followers, does anybody know of a shop in CO that will regrind both? I called my machine shop and several others around town and the consensus was that there were no places in Denver anymore.
Way back when I built the F in Wildrice I had Spitfire make the cam. It still is a bad mutha of an F so they must have done it right. Mac, the original owner couldn't still be alive as he was old back then but the shop is still around and still cranks out some nasty stuff so you might give 'em a call....

http://www.spitfireracingengines.com/services.html
__________________
KUBN
Kevin
TLCA #3007
Northside!

Colorado Trail Patrol
Stay on the Trail!
I'm the God-fearing, gun-toting, American flag-waving, conservative you were warned about!
Quote:
Originally Posted by AxleIke View Post
I need an FJ40....
Quote:
Originally Posted by Red_Chili View Post
Cruisers are superior
Reply With Quote
  #7  
Old 11-25-2008, 05:13 PM
leiniesred leiniesred is offline
Hard Core 4+
 
Join Date: Aug 2005
Location: Aurora, CO, USA
Posts: 1,282
Default

That is what the tappets always look like when the cam goes flat. *shrugs*

I have a hunch that modern engine oil is to blame for your flat cam.

In Austin Healey land, we've discovered cam destruction is often related to today's oils vs yesteryear's flat tappet technology. A brand new cam, with propper assembly lube and break-in, can go flat in < 1,000 miles on a healey! The big healys sport a big ol' cast iron I-6 tractor engine very similar to the FJ40's engine.
Today's oils often have less of some critical additives. (Zinc Dialkyl DithioPhosphate in particular (ZDDP))
Here is a great link:
http://www.netbug.net/blogmichael/?p=49
__________________
KD0FDS
Stephen
Reply With Quote
  #8  
Old 11-27-2008, 06:56 AM
PabloCruise's Avatar
PabloCruise PabloCruise is offline
Rising Sun Member
 
Join Date: Aug 2005
Location: Northern CO
Posts: 1,759
Default

Quote:
Originally Posted by Uncle Ben View Post
Way back when I built the F in Wildrice I had Spitfire make the cam. It still is a bad mutha of an F so they must have done it right. Mac, the original owner couldn't still be alive as he was old back then but the shop is still around and still cranks out some nasty stuff so you might give 'em a call....

http://www.spitfireracingengines.com/services.html
Good to know Kev, thanks!
__________________
TJS

1978 FJ-40
1974 FJ-55 w/ 3FE

TLCA #10713

CO/WY Horsetooth 4 Wheelers Cruiser Club - Click Here!
Reply With Quote
  #9  
Old 11-27-2008, 06:59 AM
PabloCruise's Avatar
PabloCruise PabloCruise is offline
Rising Sun Member
 
Join Date: Aug 2005
Location: Northern CO
Posts: 1,759
Default

Quote:
Originally Posted by leiniesred View Post
That is what the tappets always look like when the cam goes flat. *shrugs*

I have a hunch that modern engine oil is to blame for your flat cam.

In Austin Healey land, we've discovered cam destruction is often related to today's oils vs yesteryear's flat tappet technology. A brand new cam, with propper assembly lube and break-in, can go flat in < 1,000 miles on a healey! The big healys sport a big ol' cast iron I-6 tractor engine very similar to the FJ40's engine.
Today's oils often have less of some critical additives. (Zinc Dialkyl DithioPhosphate in particular (ZDDP))
Here is a great link:
http://www.netbug.net/blogmichael/?p=49
Wow, this looks like a great read. I'm going to have to get another cup of coffee... Sure hope my cam is not flat. I should be able to measure lift at the rockers, eh?
__________________
TJS

1978 FJ-40
1974 FJ-55 w/ 3FE

TLCA #10713

CO/WY Horsetooth 4 Wheelers Cruiser Club - Click Here!
Reply With Quote
Reply

Thread Tools

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


All times are GMT -6. The time now is 10:45 AM.


Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.