Photobucket
Members Login
Post Info TOPIC: Engine pulled and heads rebuilt on Pontiac after 50 years


Veteran Member

Status: Offline
Posts: 32
Date:
Engine pulled and heads rebuilt on Pontiac after 50 years


I decided after having some issues with the plugs fouling in cylinders 5,8 and a bit of a choppy idle i would have the heads pulled as the engine has never been touched. Compression was tested and strong at 175 and 180 across all cylinders and the engine was running pretty well overall, I was pretty optimistic that the bottom end was all ok after 100,000 plus miles. The end result, the valve guides in those two cylinders were badly worn, the timing chain was original and worn and needed to be replaced and the cam had some worn lobes......so I had the engine pulled, did the rear main bearing oil seal, replaced the  timing chain, installed a new melling cam that is very close to factory specs. The heads had 6 of the valves replaced, all new guides, hardened valve seats, a few new springs, heads machined, engine painted and all back together in a few days. Car is running very well now, smooth idle and improved performance so happy this Scotsman had the work done !



Attachments
__________________

1970 Pontiac 2+2 covertible 400 cubic inch

U.S. Embassy car when new - in the family since 1973



Canadian Poncho Superstar!

Status: Offline
Posts: 6871
Date:

Nice job! Looks great, and certainly a testament to the durability and simplicity of the SBC.

Probably would have gone another 50 without anything done ...

FA57BF8A-D616-4428-9E8C-675231169309.jpeg



Attachments
__________________
67' Grande Parisienne. Ex Ottawa USSR Embassy car, 67- 68.
6977017306_dfca361bfc_m.jpg
 


Canadian Poncho Superstar!

Status: Offline
Posts: 19291
Date:

Looks really nice. I only have experince with one 400 small block and that was in the green and gold 2+2 Hillar bought from Clint. Once it got to Toronto Hillar had the engine touched up and a good dual exhaust system installed. I was very impressed with the torque and its ability to lay down two seroius patches of rubber. I am sure yours will be equally if not more impressive Macker



__________________

Ray White, Toronto ON

1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Polo green metallic & tan  - Bowling Green Kentucky 






Canadian Poncho Superstar!

Status: Offline
Posts: 5917
Date:

73SC wrote:

Looks really nice. I only have experince with one 400 small block and that was in the green and gold 2+2 Hillar bought from Clint. Once it got to Toronto Hillar had the engine touched up and a good dual exhaust system installed. I was very impressed with the torque and its ability to lay down two seroius patches of rubber. I am sure yours will be equally if not more impressive Macker


Macker's 400 is sporting the same intake & carb that I put on the car I sold Hillar (1970 300 hp 350).   I sold Macker the intake & carb, and I think the dual snorkel air cleaner.



__________________
70 2+2 convertible
70 2+2 hardtop
70 Parisienne hardtop
72 GMC Sierra

 

 



Canadian Poncho Superstar!

Status: Offline
Posts: 19291
Date:

That  SBC 400 in the Green and Gold car was stout. I'd say it had torque and pulling power on par with a similar displacement big block.



__________________

Ray White, Toronto ON

1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Polo green metallic & tan  - Bowling Green Kentucky 




Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.

Tweet this page Post to Digg Post to Del.icio.us
.
Support Canadian Poncho!
Select Amount:
<
.
.
.