LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Valve Spring install HELP!!!!

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Old 05-06-2009, 05:18 PM
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Originally Posted by WS Sick
The stock and shouldered seat shown are not to be used if the spring is stock diameter you can use a l-98 spring seat (from alum headed vettes ) or buy the propper seat. the inner spring should not touch the seat except on the bottom.

As said in the 2nd post a hardened steel shim (looks like a big washer) wil lwork as well, and as said the installed height needs to be checked and shimmed to propper height.

If you assemble it the way you have it now you will have 16 bent pushrods.
My kit came with the hardened steel shims. So are you saying i can just remove the factory spring locator and just place the shim in its place and it will be okay?
Old 05-06-2009, 05:48 PM
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Originally Posted by litch2004
My kit came with the hardened steel shims. So are you saying i can just remove the factory spring locator and just place the shim in its place and it will be okay?
I wouldn't do that, I was told that the Crane 10308 kit was made to work with stock seats. If you just install the springs with the shims and no seats, I don't think that you will get the correct installed height.
Old 05-06-2009, 05:53 PM
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im about **** out of luck here. There arent any jusnk yards that keep these cars here. They all get sent off.
Old 05-06-2009, 05:55 PM
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Originally Posted by litch2004
im about **** out of luck here. There arent any jusnk yards that keep these cars here. They all get sent off.
I'll see what I can find for you.
Old 05-06-2009, 05:55 PM
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Chevrolet V-8 92-99 350 cu. in. LT1 ------------------------------PN 10308-1
(w/Aluminum cylinder heads)
Valve Spring PN 99893-16 Steel Retainer PN 99951-16
Lock PN 99097-1 Shim PN 99050-1
The installed height using this kit on LT1 engines with factory aluminum heads should be
set between 1.875” and 1.850”. Make sure all valve springs are assembled at the same
height. The springs will provide sufficient pressure when installed within this range. The
hardened shims are used to replace the factory lower spring seats.
Make sure there is
clearance between the rocker arm and the retainer throughout the rocker arm travel.
Clearance should be a minimum of .020”.

Well i guess it would ahve helped to look at the instructions. it says it replaces them
Old 05-06-2009, 05:57 PM
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Originally Posted by litch2004
Chevrolet V-8 92-99 350 cu. in. LT1 ------------------------------PN 10308-1
(w/Aluminum cylinder heads)
Valve Spring PN 99893-16 Steel Retainer PN 99951-16
Lock PN 99097-1 Shim PN 99050-1
The installed height using this kit on LT1 engines with factory aluminum heads should be
set between 1.875” and 1.850”. Make sure all valve springs are assembled at the same
height. The springs will provide sufficient pressure when installed within this range. The
hardened shims are used to replace the factory lower spring seats.
Make sure there is
clearance between the rocker arm and the retainer throughout the rocker arm travel.
Clearance should be a minimum of .020”.

Well i guess it would ahve helped to look at the instructions. it says it replaces them
Interesting, I was told otherwise. I guess you're good to go.
Old 05-06-2009, 06:15 PM
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I appreciate that you would look for them for me.
And ya I'm just glad i did some research on it and found out that i didnt need to change them out for another style and go through all that trouble for nothing. Hopefully i dont run in to any other problems down the line.

Also what tool did you find was the easiest to compress the new dual springs?
Old 05-06-2009, 06:27 PM
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Originally Posted by litch2004
I appreciate that you would look for them for me.
And ya I'm just glad i did some research on it and found out that i didnt need to change them out for another style and go through all that trouble for nothing. Hopefully i dont run in to any other problems down the line.

Also what tool did you find was the easiest to compress the new dual springs?
I used a tool just like this:



Worked fine. But the best tool to use is the one I just bought, the Crane Spring Compressor Tool:

http://store.jandjspeedshop.com/images/Crane99472.jpg
Old 05-06-2009, 10:31 PM
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well i went a bought the lever tool to compress the spring. Ends up that tool only works with the heads on the car with the piston at top dead center. So i went and bought the KD style spring compressor and got all the old ones off. Like shbox says it doesnt really work to well with the dual springs but it only allowed the inner spring to fall down on me twice. So i got them all on on one head so i guess i will start fresh tomorrow.

Now when i place the new ARP rocker studs on do they need thread lock applied to them? If so what kind; the blue one or the red one??
Old 05-07-2009, 11:35 AM
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Originally Posted by litch2004
well i went a bought the lever tool to compress the spring. Ends up that tool only works with the heads on the car with the piston at top dead center. So i went and bought the KD style spring compressor and got all the old ones off. Like shbox says it doesnt really work to well with the dual springs but it only allowed the inner spring to fall down on me twice. So i got them all on on one head so i guess i will start fresh tomorrow.

Now when i place the new ARP rocker studs on do they need thread lock applied to them? If so what kind; the blue one or the red one??
When I read the instructions it had torque specs. IIRC it said to torque the studs to 50 ft lbs with the threads coated with oil, so that's what I did.
Old 05-07-2009, 01:55 PM
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Originally Posted by ss.slp.ls1
When I read the instructions it had torque specs. IIRC it said to torque the studs to 50 ft lbs with the threads coated with oil, so that's what I did.
Ok just making sure that they didnt require any locktite
Old 05-07-2009, 03:55 PM
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Glad you sorted it out, I like the crane tool that allows you to do a whole cylender at a time, I dont have the number of it handy but it is sold by Summit.
Old 05-07-2009, 04:01 PM
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Originally Posted by WS Sick
Glad you sorted it out, I like the crane tool that allows you to do a whole cylender at a time, I dont have the number of it handy but it is sold by Summit.
I just bought it.
Old 05-07-2009, 04:04 PM
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Originally Posted by ss.slp.ls1
I just bought it.
You;ll love it, I just changed the springs on two engines in an afternoon. with that thing. The longest part was threading in the air chuck...lol
Old 05-07-2009, 04:09 PM
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Originally Posted by WS Sick
You;ll love it, I just changed the springs on two engines in an afternoon. with that thing. The longest part was threading in the air chuck...lol
I just do the TDC method.
Old 05-07-2009, 08:46 PM
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I just want to confirm that the 99893 springs won't fit on the stock seats. I used them on my first build.
Old 05-08-2009, 12:13 AM
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Originally Posted by RamAir95TA
I just want to confirm that the 99893 springs won't fit on the stock seats. I used them on my first build.
ya im using the crn-10308-1 kit not sure if the part number you posted is the part number for just the springs but i ended up reading the instructions and it said that the hardened shims that cam in the kit replaced the stock seats.
Old 05-08-2009, 08:51 AM
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Originally Posted by litch2004
well i went a bought the lever tool to compress the spring. Ends up that tool only works with the heads on the car with the piston at top dead center. So i went and bought the KD style spring compressor and got all the old ones off. Like shbox says it doesnt really work to well with the dual springs but it only allowed the inner spring to fall down on me twice. So i got them all on on one head so i guess i will start fresh tomorrow.

Now when i place the new ARP rocker studs on do they need thread lock applied to them? If so what kind; the blue one or the red one??
I don't know which APR studs you're buying, but be sure to check out the spec sheet that comes with them for the correct torque. Depending on which studs you buy, the torque setting could be different.

My ARP 7202s call for a 55# when using ARP's moly-lube and 70# when using 30W oil instead on ARP lube.

Jake

West Point ROCKS!
Old 05-08-2009, 09:26 AM
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Originally Posted by litch2004
ya im using the crn-10308-1 kit not sure if the part number you posted is the part number for just the springs but i ended up reading the instructions and it said that the hardened shims that cam in the kit replaced the stock seats.
Yes, the part number for the springs included in the 10308 kit is 99893.
Old 05-08-2009, 11:35 AM
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Originally Posted by RamAir95TA
Yes, the part number for the springs included in the 10308 kit is 99893.
I installed the crn-10308 spring kit on the stock seats and it fit.


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