SPONSORED LINKS

1970 Pontiac Firebird CAM and valve springs

Tiny
USGENERATION
  • MEMBER
  • 1970 PONTIAC FIREBIRD
Engine Mechanical problem
1970 Pontiac Firebird V8 Two Wheel Drive Manual

Hi,
My Car is a 1970 Trans am Ram Air lll
I had its engine overhauled
Piston, valves, and valve Springs changed with normal pontiac parts..
After around 100miles it broke one valve spring..
I changed it, after another 100miles it broke another one..I changed a set of valve springs..again the problem happened.

here is the info about its camshaft :
http://fiedlerh.home.att.net/PontiacCams.htm
the model is 9785744

Do you know what the problem is ?
And if I should use a special kind of Valve springs, can you please guide me exactly what should I buy?

Thanks
SPONSORED LINKS
Saturday, May 16th, 2009 AT 1:56 PM

2 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Are you breaking exhaust or intake? Did you check installed spring heigth? Also stock rocker arms? Did rotators get put back on exhaust valves?
Was this
answer
helpful?
Yes
No
Monday, May 18th, 2009 AT 3:06 PM
Tiny
USGENERATION
  • MEMBER
  • 2 POSTS
Well, I'm breaking intake valve springs.
The new springs I installed had the same height, but i'm not sure whether they have the same height as the stock ones.
Rocker arms are stock.
I'm sorry, what are the rotators?

Thanks again.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, June 10th, 2009 AT 4:39 PM

Please login or register to post a reply.

Related Cylinder Head Valve Spring Content

VIEW MORE

Sponsored links