I found a pretty good deal on Evo 8 stock valves/springs and retainers. My question is...are they all beehive(from what I hear) and how many miles should be on them for me to turn and walk away? I will be purchasing some cams(don't know which ones yet) for my winter make over and I just want to make sure I don't have any valve float.
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Evo valve spring question
- Thread startervtecds1
- Start date
Rausch
Well-known member
No different than any other spring. Yes, they are a beehive style spring:
I'd stay away from parts with a TON of miles on them, but otherwise they should be ok. You can always test them/have them tested to verify they are up to snuff. /ubbthreads/images/graemlins/smile.gif
Couple pics from my grimey basement for reference:
Evo Valves and springs in a 1g head. 1g Spring and retainer for comparison.
I'd stay away from parts with a TON of miles on them, but otherwise they should be ok. You can always test them/have them tested to verify they are up to snuff. /ubbthreads/images/graemlins/smile.gif
Couple pics from my grimey basement for reference:
Evo Valves and springs in a 1g head. 1g Spring and retainer for comparison.
Last edited:
toybreaker
iconoclast
- Joined
- Apr 30, 2006
- Messages
- 3,581
^^^
/ubbthreads/images/graemlins/redx.gif
/ubbthreads/images/graemlins/redx.gif
Rausch
Well-known member
Click 'em fool. The uploader and I aren't getting along apparently. /ubbthreads/images/graemlins/frown.gif
Rausch
Well-known member
Oh, and P.S.: The intake valves are nothing special. The important ones are the exhaust valves. /ubbthreads/images/graemlins/smile.gif
curtis
Well-known member
Oh my God Aaron is finally finishing development of the 5 valve per cylinder head.
Quoting Rausch:
Oh, and P.S.: The intake valves are nothing special. The important ones are the exhaust valves. /ubbthreads/images/graemlins/smile.gif
True. The Evo intake valves are still the same part number as VR4/1g TEL/4G61T valves.
Oh, and P.S.: The intake valves are nothing special. The important ones are the exhaust valves. /ubbthreads/images/graemlins/smile.gif
True. The Evo intake valves are still the same part number as VR4/1g TEL/4G61T valves.
Rausch
Well-known member
Quoting vtecds1:
Thank you sir...
You mentioned that I can test them...more info on this please. The seller said there is about 3k miles on them, but I take that with a grain of salt.
Any decent machine shop should have a spring compressor/tester guy. You pop the spring in, compress it, and the indicator gives you a reading. Dig up the specs on the OEM springs, and take a couple to a machine shop, or someplace that sells them /ubbthreads/images/graemlins/wink.gif, and check them to see if any are 'saggy' or not up to spec.
You can measure the height of the spring to start, just get you set of calipers.
With the valve spring tester, the spring should rear a specific pressure at a specific compressed height.
As a point of reference the springs in the head pictured (evo springs) were 152# at 1.100". and something like 64# at 1.530".
Thank you sir...
You mentioned that I can test them...more info on this please. The seller said there is about 3k miles on them, but I take that with a grain of salt.
Any decent machine shop should have a spring compressor/tester guy. You pop the spring in, compress it, and the indicator gives you a reading. Dig up the specs on the OEM springs, and take a couple to a machine shop, or someplace that sells them /ubbthreads/images/graemlins/wink.gif, and check them to see if any are 'saggy' or not up to spec.
You can measure the height of the spring to start, just get you set of calipers.
With the valve spring tester, the spring should rear a specific pressure at a specific compressed height.
As a point of reference the springs in the head pictured (evo springs) were 152# at 1.100". and something like 64# at 1.530".
I`m going to take a risk and buy them before someone does. The package deal is $40 which isn't too bad if i do take a loss. I`ll take it to a local shop to have it tested as soon as I get a chance. Thanks again for the info.
