BTR changing valve springs 

haha made my night with that comment. Thank you sir.

That is hilarious. "never strike the same place twice."

Just a guess here, but typically a car is around 120 psi when doing a compression check. That'll be a good start.

I've been trying to find out the same thing!

Did you find an answer for this?

@@lalonbs0092 I have done some reading and few people mention 100 psi

It being a 4.3 that's the same as a sbc gen1 style. Theres hundreds of different ways people change those. I changed the springs on my 400 SBC I use to race but while I was in college it sat alot and some of the springs on opened valves got weak. I just used the air to keep valves up and used the valve spring compressor tool to hold down the spring. u bolt it to rocker stud and press down enough to get locks keepers out. It was on a s10 blazer I had it in. Hope the best for u.

Why jeopardize all that work over $99 upgrade? Do it right, do it once

I just did my springs today with a Briggs and stration pancake compressor and didn't have any problems

KASOR8281 here is a link. What I don’t like about this method is pushing up in the valve with the piston you are pushing of the edge of the valve. Myself wouldn’t want to do that. I picture bent valves. Even slightly is failure. Learn to find TDC from watching the push rods and you can feel and hear the compression stroke on the cylinder you’re working with. Ensure using something to go inside plug hole. Then I would use the air. This way is something stupid happens with your compressor or hose or fittings. Your valves don’t drop into the cylinder. Which means heads come off. Here is that link but I don’t recommend it. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-t1WYC84eeMU.html

String method

They made it

They can but that’ll raise the price another $60-$80 I’m sure for springs

Did you ever find the answer to this? Doing an install now and wondering the same thing. The seal WILL NOT go down far enough to bottom out even with the proper tool.

@@isaachill3869 can you send a pic of what you're working on? Honestly I forgot but maybe a pic will refresh my memory.

@@charlesclemons741 I’m not sure how to send a pic. I’m installing new dual springs on LS3 heads. Everyone is saying there should be about 1/8th of an inch between the seat and the seal though with the new one! Does that ring a bell?

@@isaachill3869 that sounds right. I remember having to order additional seals because I destroyed some during the install. But that spacing sounds about right.

@@charlesclemons741 haha! I did the exact same thing!! I ended up ordering more seals and the btr tool for it 😂😂 thank you for answering so quickly! Cheers 🍻

Rubber mallet works good and won't hurt anything.

Put a socket with a magnet in to give it a few taps works well on stock springs .