OST-069: Transformation

User avatar
oldeskewltoy
Club4AG MASTER
Posts: 2060
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

OST-069: Transformation

Postby oldeskewltoy » Thu Nov 05, 2020 8:31 am

Image



OST-069 begins its transformation with a cleaning.....

Nasty..... top

Image



and bottom....

Image


and while a cleaning gets it suitable for work....

Image


it is still too nasty to sell... so add another step... tumble it!!

Image


Image



more to come.... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

User avatar
oldeskewltoy
Club4AG MASTER
Posts: 2060
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: OST-069: Transformation

Postby oldeskewltoy » Thu Nov 12, 2020 1:05 pm

from another forum wrote:Maybe I have missed this, but you have a big tumble cleaner that are large enough to fit engine heads? :dumb:


No, one of the machine shops I use has a large "tumbler" - large enough for blocks! The tumbler is partially filled with zinc shot. They close the lid and the head is dragged repeatedly though the zinc shot.



Porting begins.... #1 on the right had a bit of a step left after the factory machining, I cut this back and smoothed it out. On the left, #2, adjusting the seat and bowl

Image


I frequently have to "fix" core shift, here is a prime example from the exhaust side

Image


2 down... 2 to go....

Image



more to come...... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!


Return to “TECH: 4A-GE ENGINE”

Who is online

Users browsing this forum: No registered users and 10 guests