![Reply](http://www.njfboa.org/forums/images/buttons/reply.gif) |
09-20-2012, 09:51 PM
|
#1
|
Join Date: Jul 2011
Location: harmony, nj (phillipsburg)
Posts: 513
|
350 with a flattened cam lobe
sup guys, been a little bit. havent been on much due to being knee deep in sidework and stuff. here is my problem this time round. i purchased a 94 c1500 5-speed with a '70 350 in it. supposedly it has some aftermarket cam in it, holley intake, comp 1.5 roller tip rockers, edelbrock 600 cfm carb. got it for 500 due to a burned #1 exhaust lifter and flat cam lobe.
now heres the good part, upon further inspection, i noticed the pushrod guide hole in the head for the #1 exhaust pushrod didnt look right. there was something epoxied in it, like a bushing. i put the pushrod through it, and it gave it no play or wiggle room. i have honestly never ever seen someone do this to a head before.
i pulled it out since it was loose and found the guide hole to be slightly rounded:
now my question is, do i just get a new cam, lifters, and pushrods? or do you guys think i need new heads as well? ive seen this wayy worse on bent valve/pushrod motors before, but never this little bit, hence why i really would rather try to get the heads i have to work. other than this one spot, everything else on em looks great. any advice would be awesome. thanks guys
__________________
1994 Firebird Formula - Injuneer's car - NEW PB 9.90 @131
2021 Charger Scat
Wrench/driver 94 Camaro Ellwein 385/D1SC/CPT 4l60e/9" slow pile
|
|
|
09-20-2012, 10:26 PM
|
#2
|
Join Date: Feb 2010
Location: Stillwater
Posts: 822
|
Never seen it nor do I understand why it was done (other then it being ovaled) but they seem to have sleeved that pushrod hole.
Better question... how do you flatten a lobe on a roller cam - and how do you manage to do that and not damage anything else?! I can see if that exhaust pushrod bound and whipped the lobe but that's a stretch since it would bend the pushrod before it would damage the cam. Makes sense that it bound and burned the exhaust valve.
I'd wait for more responses but I'd imaging if you ran a NSA rocker and guide plates you can salvage that head.
Edit:
Just read it's a flat tappet motor. Sorry for the first half of my statement lol.
__________________
Quote:
Originally Posted by LTb1ow
...its cool to like diesels, cause that and pretending to be country is like, hip nowadays!!
|
Last edited by zraffz; 09-20-2012 at 10:27 PM.
|
|
|
09-20-2012, 11:29 PM
|
#3
|
Join Date: Jul 2011
Location: harmony, nj (phillipsburg)
Posts: 513
|
yeah man. its no fun. im wondering if i can get away with it for a while, or if anyone has any cheap 350 heads layin round haha
__________________
1994 Firebird Formula - Injuneer's car - NEW PB 9.90 @131
2021 Charger Scat
Wrench/driver 94 Camaro Ellwein 385/D1SC/CPT 4l60e/9" slow pile
Last edited by townsend; 09-20-2012 at 11:30 PM.
|
|
|
09-20-2012, 11:31 PM
|
#4
|
Join Date: Jul 2011
Location: harmony, nj (phillipsburg)
Posts: 513
|
edit: the pistons and valves are fine. i pulled the head earlier and the lifter that was cooked had paint stuck inside it, hence getting 0 oil!
__________________
1994 Firebird Formula - Injuneer's car - NEW PB 9.90 @131
2021 Charger Scat
Wrench/driver 94 Camaro Ellwein 385/D1SC/CPT 4l60e/9" slow pile
Last edited by townsend; 09-20-2012 at 11:33 PM.
|
|
|
09-22-2012, 10:04 AM
|
#5
|
Join Date: Feb 2010
Location: Stillwater
Posts: 822
|
Dude I don't understand why they honestly put a bushing in there. It's better to let it move however it wants than to restrict it's movement. Seriously wonder why some people do the crap they do sometimes lol.
__________________
Quote:
Originally Posted by LTb1ow
...its cool to like diesels, cause that and pretending to be country is like, hip nowadays!!
|
|
|
|
09-22-2012, 10:20 AM
|
#6
|
Ayatollah of Rock N Rolla / Admin
Join Date: Mar 2006
Location: Parts Unknown
Posts: 12,573
|
I think it was a brokeass way to try and keep the pushrod "somewhat" guided.
I do not think you need new heads but pushrod guideplates are probably needed. New cam, lifters, and pushrods as well.
What concerns me more is the wiped lobe, and all that metal that went through the engine.
|
|
|
09-25-2012, 09:02 PM
|
#7
|
Join Date: Jul 2011
Location: harmony, nj (phillipsburg)
Posts: 513
|
Quote:
Originally Posted by WildBillyT
I think it was a brokeass way to try and keep the pushrod "somewhat" guided.
I do not think you need new heads but pushrod guideplates are probably needed. New cam, lifters, and pushrods as well.
What concerns me more is the wiped lobe, and all that metal that went through the engine.
|
this is what concerns me as well. in theory though, since the pushrods are ball-end and the rocker is a comp magnum that the pushrod kinda "pops" into, do i really need guideplates? i really hope not, because then that involves machine work to the heads, etc.
im at the point now that im thinking of selling what i can of the motor, and buying a junkyard/running lt1 out of something, slapping a carb and distributor on it, and driving it through winter.
__________________
1994 Firebird Formula - Injuneer's car - NEW PB 9.90 @131
2021 Charger Scat
Wrench/driver 94 Camaro Ellwein 385/D1SC/CPT 4l60e/9" slow pile
Last edited by townsend; 09-25-2012 at 09:04 PM.
|
|
|
09-25-2012, 09:16 PM
|
#8
|
Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,899
|
I haz a LT1 shortblock.
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
|
|
|
|
09-26-2012, 08:18 AM
|
#9
|
Join Date: Jul 2011
Location: harmony, nj (phillipsburg)
Posts: 513
|
Im still interested in it haha. Know anyone with heads?
__________________
1994 Firebird Formula - Injuneer's car - NEW PB 9.90 @131
2021 Charger Scat
Wrench/driver 94 Camaro Ellwein 385/D1SC/CPT 4l60e/9" slow pile
|
|
|
09-26-2012, 08:18 AM
|
#10
|
Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,899
|
Plain old stockers, I think Brandon (transmaro93) does.
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
|
|
|
|
09-26-2012, 08:22 AM
|
#11
|
Ayatollah of Rock N Rolla / Admin
Join Date: Mar 2006
Location: Parts Unknown
Posts: 12,573
|
Quote:
Originally Posted by townsend
this is what concerns me as well. in theory though, since the pushrods are ball-end and the rocker is a comp magnum that the pushrod kinda "pops" into, do i really need guideplates? i really hope not, because then that involves machine work to the heads, etc.
im at the point now that im thinking of selling what i can of the motor, and buying a junkyard/running lt1 out of something, slapping a carb and distributor on it, and driving it through winter.
|
I was thinking if you stick with the current heads it may be a good idea.
I'd look for a bone stock carbed gen 1 for a good price.
|
|
|
09-26-2012, 08:27 AM
|
#12
|
Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,899
|
Pushrod guideplates don't keep the pushrod to rocker, they keep the rocker to valve stem no?
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
|
|
|
|
09-26-2012, 08:30 AM
|
#13
|
Ayatollah of Rock N Rolla / Admin
Join Date: Mar 2006
Location: Parts Unknown
Posts: 12,573
|
I was thinking that the enlarged hole in the head might mean something funny is going on. He would need hardened pushrods as well but I think it's a non issue as he's looking for a new motor.
The oval slot in this case is what used to guide the pushrod.
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
|
|