#41  
Old 09-20-2020, 07:21 AM
Jeff Hamlin's Avatar
Jeff Hamlin Jeff Hamlin is offline
Ultimate Warrior
 
Join Date: Jan 2000
Location: Beach side of Virginia
Posts: 9,371
Default

Wayne,
We're hanging in there, Thanks. Hope all is well on your end.
My build came to a complete stop.
The machine shop was acttive with their summer schedule even with all this 19 crap.
I was just getting ready to hopefuly reanimate this project,
since they should be winding down.

I should be able to get my Block and Head over to them soon.
Otherwise no much to report.
Glad you figured out your carb issue.

__________________
When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
  #42  
Old 09-20-2020, 11:27 AM
wayne228's Avatar
wayne228 wayne228 is offline
Senior Member
 
Join Date: Mar 2018
Location: Connecticut
Posts: 113
Default

We are well. I have a new glitch with my second spare OHC 250 - The engine came to me quite a few years ago and was supposedly rebuilt. I hung a starter on it this week and found each cylinder develops only 90 lbs.. I opened it up and the cam looks new, as well as the rest of top parts. Pulled the head and , again, looks new. cylinder walls are smooth. Timing is dead on. Think I may do a "look for leaks by putting air pressure in the cylinders test " ( Senior moment...can't remember proper name for it ) Am I missing something ? (senior moments wise ) Any ideas ?

  #43  
Old 09-21-2020, 07:01 AM
Jeff Hamlin's Avatar
Jeff Hamlin Jeff Hamlin is offline
Ultimate Warrior
 
Join Date: Jan 2000
Location: Beach side of Virginia
Posts: 9,371
Default

Head Gasket and/or rings would/could be of issue.

__________________
When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
  #44  
Old 09-21-2020, 09:01 AM
wayne228's Avatar
wayne228 wayne228 is offline
Senior Member
 
Join Date: Mar 2018
Location: Connecticut
Posts: 113
Default

Had a chance to "play" yesterday afternoon, found ALL the valves ( intake & exhaust ) have seating issues. Not big, but just enough to let air begin to pass by at about 70 lbs. I would guess the person who did the head did not know enough about the OHC 6 or just never lapped the valves. Next chance I get I'll pull them & see what the story is.

  #45  
Old 09-23-2020, 04:40 PM
wayne228's Avatar
wayne228 wayne228 is offline
Senior Member
 
Join Date: Mar 2018
Location: Connecticut
Posts: 113
Default

It's funny how a little thing can cause a flashback to high school. If I didn't know better I would think this engine was a High School shop project. We had a few new engines, that the teacher stripped down each year and the "project" was to put yours back together correctly. This engine seems the same....All the parts in the correct spots, but little things a-miss, like valve stem seals and so on are missing. Valves are brand new...straight out of the box and into the head..."We don't need no stinking seals or lapping....it just slows the build progress ! " LOL Can't wait to see the lower end.... Jeff, if I kind of Hi-jacked your thread, I apologize ! It was not my intent. Covid has me pulling out all the "someday projects " that's how I wound up working on the second "spare engine" As you said in a thread ( a long time ago ) these OHC-6 engines have a way of multiplying if left alone together too long . LOL

  #46  
Old 09-23-2020, 07:51 PM
Jeff Hamlin's Avatar
Jeff Hamlin Jeff Hamlin is offline
Ultimate Warrior
 
Join Date: Jan 2000
Location: Beach side of Virginia
Posts: 9,371
Default

Have at it Brother.
I'm iching to get things moving again,
So in the meantime I'm living vicariously through your post

__________________
When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
  #47  
Old 09-26-2020, 09:53 PM
wayne228's Avatar
wayne228 wayne228 is offline
Senior Member
 
Join Date: Mar 2018
Location: Connecticut
Posts: 113
Thumbs up

Wife told me to go to the garage today, so I got some more done. I lapped all the valves - reset the springs & found a slight leak in 4 exhaust and 6 intake and exhaust. Ok this time with feeling ! LOL After the second round of lapping all are holding fluid with no problems. ( I use WD 40 ) as it finds the smallest of areas to leak through. I'll let it leak test overnight....

  #48  
Old 10-05-2020, 06:31 PM
wayne228's Avatar
wayne228 wayne228 is offline
Senior Member
 
Join Date: Mar 2018
Location: Connecticut
Posts: 113
Default

Ok, so where are we today ? Ah yes, I remember now....I finished breaking down the engine today & found that it was, in fact, rebuilt using no new parts ( on the lower end) at all. The cylinder walls are all shiny and still had the OEM ridge. Did find a mouse nest in the oil pan ! Now the good news . The engine cylinders mick out at 3.875 to 3.877 rings are somewhat worn but NOT TOO SHABBY for a '68 ! Seems the engine was well cared for and never rebuilt. Everything else in the lower end looks great also. This is going to be a re-ringing and go job. I know it's only a 1 Bbl but I am sure I'll find something to do with it in the future...( now I just have to find a 66 tempest ) Oops ! did I type that out loud ??? LOL

  #49  
Old 05-27-2021, 05:51 PM
Jeff Hamlin's Avatar
Jeff Hamlin Jeff Hamlin is offline
Ultimate Warrior
 
Join Date: Jan 2000
Location: Beach side of Virginia
Posts: 9,371
Thumbs up I've not given up,

just detoured slightly
Block and rotating assembly just dropped off at the machine shop.
Attached Thumbnails
Click image for larger version

Name:	SPRINT 1 (4).jpg
Views:	253
Size:	70.3 KB
ID:	567394  

__________________
When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
  #50  
Old 06-03-2021, 06:29 AM
Jeff Hamlin's Avatar
Jeff Hamlin Jeff Hamlin is offline
Ultimate Warrior
 
Join Date: Jan 2000
Location: Beach side of Virginia
Posts: 9,371
Smile Small victories

When I dropped off the block/parts we went over some of the details.

One being, if at all possible was to retain the deck codes.

Happy to report after thorough testing at all points they said the Block does not need to be decked, so I can/will have the factory stamp/code.

Waiting for cylinder info so I can set up the next step.
Attached Thumbnails
Click image for larger version

Name:	66 SPRINT BUILD 2.jpg
Views:	215
Size:	66.1 KB
ID:	567625   Click image for larger version

Name:	66 SPRINT BUILD 13.jpg
Views:	200
Size:	56.9 KB
ID:	567626  

__________________
When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
  #51  
Old 06-03-2021, 09:04 AM
Big Bear's Avatar
Big Bear Big Bear is offline
Senior Member
 
Join Date: Feb 2014
Location: Ont Canada
Posts: 132
Default

Hi Jeff Did they originaly intend on having cross bolted mains. Looks like the casting is there in the block . That would have made for a ridged bottom end.

  #52  
Old 06-03-2021, 09:50 AM
JSchmitz's Avatar
JSchmitz JSchmitz is offline
Ultimate Warrior
 
Join Date: Jan 2000
Location: Union, MO
Posts: 2,131
Default

Thanks to all for sharing the Sprint stuff! I've never had the pleasure of driving one. Anyone have driving impression story from the first time you drove one? I assume it shines at high RPM's.

  #53  
Old 06-04-2021, 06:44 AM
Jeff Hamlin's Avatar
Jeff Hamlin Jeff Hamlin is offline
Ultimate Warrior
 
Join Date: Jan 2000
Location: Beach side of Virginia
Posts: 9,371
Default

Quote:
Originally Posted by Big Bear View Post
Hi Jeff Did they originaly intend on having cross bolted mains. Looks like the casting is there in the block . That would have made for a ridged bottom end.

In Mac McKellars SAE report it was stated as not necessary;
Attached Thumbnails
Click image for larger version

Name:	SAE 1 001.jpg
Views:	206
Size:	75.0 KB
ID:	567663   Click image for larger version

Name:	SAE 19 001.jpg
Views:	231
Size:	64.2 KB
ID:	567664   Click image for larger version

Name:	SAE 20 001x.jpg
Views:	222
Size:	78.6 KB
ID:	567665  

__________________
When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
  #54  
Old 06-04-2021, 06:48 AM
Jeff Hamlin's Avatar
Jeff Hamlin Jeff Hamlin is offline
Ultimate Warrior
 
Join Date: Jan 2000
Location: Beach side of Virginia
Posts: 9,371
Default

I'm sure this will still be a long/slow process but I'll keep at it.
It's nice to be ahead of this build, rather than having a ton of bolt-on parts still needing restoration/replacement.


__________________
When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
  #55  
Old 06-04-2021, 10:15 AM
63 bomb's Avatar
63 bomb 63 bomb is offline
Senior Member
 
Join Date: Mar 2020
Posts: 125
Default

Man, Jeff... Looking good Sir!

  #56  
Old 06-04-2021, 10:23 PM
Big Bear's Avatar
Big Bear Big Bear is offline
Senior Member
 
Join Date: Feb 2014
Location: Ont Canada
Posts: 132
Default

Thanks Jeff For the peek at Macs report. It looks like they left the bosses cast into the skirt [if required for future developments]. Did'nt know in 1966 where the power levels were going to end up. Nice job on the new build.

  #57  
Old 06-05-2021, 06:54 AM
Jeff Hamlin's Avatar
Jeff Hamlin Jeff Hamlin is offline
Ultimate Warrior
 
Join Date: Jan 2000
Location: Beach side of Virginia
Posts: 9,371
Default

Thanks, Guys
Thankfully this is just a project motor with no real home...Yey
It has been and will likely continue to be a very slow progression.

Big Bear,
If interested here is a page with the S.A.E. report and other Mac-related images.

https://www.pinterest.com/mrbigblues...-6-sae-report/

__________________
When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
  #58  
Old 08-18-2021, 08:15 PM
Jeff Hamlin's Avatar
Jeff Hamlin Jeff Hamlin is offline
Ultimate Warrior
 
Join Date: Jan 2000
Location: Beach side of Virginia
Posts: 9,371
Thumbs up GOOD NEWS FROM THE MACHINEST...

While planning for NORWALK I somehow ended up buying another engine locally and sold off most of the bits while in OH.
This got me thinking about my project that was still in limbo at the shop.

So I emailed them on the 11th just to see how it was going, well they called me today to tell me that the deck, crank, and rods all cleaned up to standard spec
This to me is amazing since this is a collective assembly of parts from over the years.
Piston bores cleaned up to 0.30

Ordered the bearings and pistons just now, so maybe I'll have a short block before the snow falls

__________________
When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
  #59  
Old 08-29-2021, 09:45 AM
Jeff Hamlin's Avatar
Jeff Hamlin Jeff Hamlin is offline
Ultimate Warrior
 
Join Date: Jan 2000
Location: Beach side of Virginia
Posts: 9,371
Default

Parts came in pretty quick and just dropped them at the shop.
Slowly inching forward
Attached Thumbnails
Click image for larger version

Name:	SPRINT 27-A.jpg
Views:	176
Size:	44.1 KB
ID:	572103   Click image for larger version

Name:	SPRINT 27-F.jpg
Views:	175
Size:	38.1 KB
ID:	572104   Click image for larger version

Name:	SPRINT 27-K.jpg
Views:	172
Size:	58.6 KB
ID:	572105   Click image for larger version

Name:	SPRINT 27-M.jpg
Views:	171
Size:	65.1 KB
ID:	572106  

__________________
When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
  #60  
Old 09-09-2021, 02:05 PM
Jeff Hamlin's Avatar
Jeff Hamlin Jeff Hamlin is offline
Ultimate Warrior
 
Join Date: Jan 2000
Location: Beach side of Virginia
Posts: 9,371
Wink Another inch forward...

...
Attached Thumbnails
Click image for larger version

Name:	SPRINT 27-P.jpg
Views:	176
Size:	66.6 KB
ID:	572746  

__________________
When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
The Following User Says Thank You to Jeff Hamlin For This Useful Post:
Reply

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -4. The time now is 02:08 PM.

 

About Us

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.

 




Copyright © 2017