SBC VALVE SEALS????'s

[dickeymoore]

I have a new sbc Promaxx 200 heads that has been ran for about 3 minutes and I need to change out the springs locators and springs so I will have to remove the valve seals anyone now what valve seals I need to install?Thanks

 

[lilbowtie]

Why are you changing after only running three min.?? Positive valve stem seals. You need to choose the right material for your application

 

[dickeymoore]

I'm changing to better springs and locators

 

[lilbowtie]

I hope you are installing the springs the cam requires which should have been done in the first place. Make sure the springs are installed to the proper install height (valve spring mic's are cheap) and make sure your valve train geometry is correct - might need new push rods.

 

[fleming442]

A man's got to know his limitations. I wouldn't try anything beyond straight replacement parts on a stock maintenance rebuild. I'll pay someone else for horsepower dreams.

 

[64nailhead]

Can you supply some more details?

What cam is in it - specifically?
Why did it run for3 minutes?
What springs are you installing?
What is the application of this motor? We shouldn't assume that it's a daily driver that makes 400hp.
Do you have a seal installing tool and a valve spring micronometer?

Most every machine shop will have the seals you need. lilbowtie hit all of the hot spots - you need to know the spring to know the correct installed height which leads to the correct open and seat pressure. If you bought these heads new from Promaxx, then I'm sure that they are more than willing to supply you with the correct info for the seals.

 

[bracketchev1221]

The locators should be the same unless you are cutting the spring pockets.

 

[dickeymoore]

Comp cams 986-16 springs for comp cams 12-433-8 hr cam bought heads from friend who had engine problems when he started engine up

 

[dickeymoore]

I'll check the locators i hope they are the same

 

[64nailhead]

This a factory roller block with dogbone style lifter retainers?
What are you using for rockers?
And do you know how to determine push rod length?