| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#221
08-12-2023, 09:12 PM
|
||||
|
||||
Let me ask you, was the block bored the first time, or did you just use standard pistons that cam in motor originally and just hone it and put in new file fitted rings in.
|
|
#222
08-12-2023, 09:31 PM
|
|||
|
|||
|
Quote:
|
|
#223
08-12-2023, 09:39 PM
|
||||
|
||||
|
Gotcha
|
|
#224
08-12-2023, 09:47 PM
|
||||
|
||||
|
Quote:
|
|
#225
08-12-2023, 09:49 PM
|
||||
|
||||
|
So I’m thinking valve seal, rings getting blow by.
|
|
#226
08-13-2023, 10:58 AM
|
|||
|
|||
|
Quote:
|
|
#227
08-13-2023, 11:10 AM
|
||||
|
||||
|
Are you ball honing it which would be a safe first step to see how it might clean up?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
|
#228
08-13-2023, 11:14 AM
|
|||
|
|||
|
Quote:
|
|
#229
08-13-2023, 11:15 AM
|
|||
|
|||
|
Quote:
|
|
#230
08-13-2023, 11:58 AM
|
||||
|
||||
|
Yes a 320 grit ball hone would remove far less material, In the fact if it did not clean up ok with such a hone then you likely would have to over bore the cylinder if not the motor.
What also concerns me is that I don’t think that poor ring seal in and of itself can account for a ton of oil found in your intake, and signs of running rich from a bum carb would not show up in just one cylinder if that’s what you’ve been thinking. Anyway, first things first and seeing if that cylinder can be saved is what to look at now.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! Last edited by steve25; 08-13-2023 at 12:05 PM. |
|
#231
08-13-2023, 12:47 PM
|
|||
|
|||
|
Is 320 grit ok for plain cast rings?
|
|
#232
08-13-2023, 01:05 PM
|
||||
|
||||
|
What makes someone think that there was poor ring sealing?
Did I miss pictures of oil in the intake manifold? Stan
__________________
Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
|
#233
08-13-2023, 01:06 PM
|
||||
|
||||
|
Quote:
|
|
#234
08-13-2023, 01:08 PM
|
||||
|
||||
|
Quote:
|
|
#235
08-13-2023, 01:16 PM
|
||||
|
||||
|
Quote:
I don't know what is going on. If there was poor ring seal and oil was coming up pass the rings then why didn't it show in the cylinder /chamber when using the bore scope. If it did that and was said I don't remember seeing it. Stan
__________________
Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
|
#236
08-13-2023, 01:19 PM
|
|||
|
|||
|
Quote:
|
|
#237
08-13-2023, 01:29 PM
|
|||
|
|||
|
some better pics
|
|
#238
08-13-2023, 01:29 PM
|
||||
|
||||
|
On how many cylinders
|
|
#239
08-13-2023, 01:36 PM
|
||||
|
||||
|
Valve seals I don’t know.
|
|
#240
08-13-2023, 01:36 PM
|
||||
|
||||
|
Does that oil seem like it been thinned out by running rich?
That much oil getting in would kill off whatever the octane level was in the fuel you where running making for ping and detonation. Stock cast pistons can not withstand much of that without cracking and many times braking the rings with them. This leaves pretty good signs of scratching up & down the bore(s) . Are you seeing any signs of that? With the pistons at TDC do any of them rock more then others? This can be a sign of broken rings. If you have someone bar the motor over as you listen into each cylinder, pistons that are busted and of have broken rings will make a scraping sound when they travel the bore much more then cylinders that are ok. Your into it so far now you may have to pop the pistons out to look at them!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
| 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
