 |
|
| THE LOBBY A gathering place. Introductions, sports, showin' off your ride, birthday-anniversary-milestone, achievements, family oriented humor. |
| Reply |
|
|
Thread Tools | Display Modes |
|
#1
05-18-2024, 09:07 AM
|
||||
|
||||
SBC pushrods not spinning
On the 77 MC observed while diagnosing a miss at idle and a bog during initial light power takeoff. I'm assuming the cam is wiped. All I hear/ read about is how new cams are disintegrating left and right. Was told to "put in a roller". I'm like bull**** this is a passenger car cast pistons low compression 4800 revs max.
I'm willing to up the specs on a replacement a wee little bit but I do not want "camshaft failure" after replacing it due to "soft metal ". Any ideas on a good flat tappet? 350 2 jet all original.
__________________
Hecho en China is not good for U.S. |
|
#2
05-18-2024, 11:19 AM
|
||||
|
||||
|
Sorry I misstated the application should have posted "hydraulic lifter" not "flat tappet".
__________________
Hecho en China is not good for U.S. |
|
#3
05-18-2024, 05:11 PM
|
|||
|
|||
|
Make sure you run a oil with high levels of zinc.
https://www.speedwaymotors.com/the-t...reakdown/32479 I use STP.
__________________
'68 GTO '69 Corvette '75 Cadillac Coupe Deville TOM |
|
#4
05-18-2024, 05:46 PM
|
||||
|
||||
|
I just broke in my bone stock ‘62 Mercury V8. I’ll be honest with you, I was nervous as heck for the same reasons.
I used Driven brand 10-40 break in oil, slathered Torco cam break in lube on cam and lifters, pre lubed engine with drill till I had oil at all 16 rockers, as my son slowly turned the engine over by hand. Stactic timed it when I dropped the distributor in, filled the carb float bowl, dribbled some gas down the throat too. Fired instantly, and all is well. I honestly am going to get my next cam and lifters treated before I install them. I forgot the name of the process, but it’s just such a roll of the dice these days. There is a few threads here on the treatment process, and it’s not cheap, but I don’t have time or money for a redo either. My plan is to pull the cam out of my ‘63 LeMans next winter. Good luck.
__________________
 71' GTO -original 400/4-speed/3.23 posi 13.95 @ 102.1 on street tires @ 4055lbs. ‘63 LeMans- ‘69 400 w/ original transaxle. 2.69 gears. |
|
#5
05-18-2024, 06:19 PM
|
||||
|
||||
|
The best replacement cam for nearly all stock applications is the Sealed Power CS274, period!!!
__________________
1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
|
|
#6
05-18-2024, 08:16 PM
|
|||
|
|||
|
Nearly everything I have read imply that is the poor lifters, not cams or oil.
__________________
"At no time did we exceed 175 mph.” Dan Gurney's truthful response to his and Brock Yate's winning of the first ever Cannonball Baker Sea-to-Shining Sea... Still have my 1st Firebird 7th Firebird 57 Starchief |
|
#7
05-18-2024, 09:00 PM
|
||||
|
||||
|
Unavailable all over on that sealed power
__________________
Hecho en China is not good for U.S. Last edited by JacintasHot; 05-18-2024 at 09:01 PM. Reason: Duplicate |
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
