Newbie w. New GN

[SuperSix]

Comp Cams 980 from FullThrottle Speed:

http://www.fullthrottlespeed.com/itemdesc.asp+ic+105980-12+eq++Tp+

TA Performance:
http://www.taperformance.com/proddetail.asp?prod=TA_V1107

Stock replacements:
http://www.taperformance.com/proddetail.asp?prod=TA_V1436

There's many places to get better products and service at a lower cost.

[Steve Wood]

sigh...and on basis are you condemning the springs he currently has?

[SuperSix]

Me? I just posted some links.

[SuperSix]

Tough part is he doesn't put anything up to check/cross reference.

They are Crane Cams 99891-12

At least the specs are the same. No mention of roller..

http://www.summitracing.com/parts/CRN-99891-12/

Dual Valve Springs
1.212
0.900
0.674
No
93 lbs @ 1.550
266 @ .950
0.865
0.625
290 lbs/in.
Buick V-6 & Buick 350 V-8
99891-16

[Charlief1]

This was the specs I was going off of Steve.
 
Number of Springs Per Valve: Dual
Outside Diameter of Outer Spring (in): 1.212 in.
Coil Bind Height (in): 0.865 in.
Damper Spring Included: No
Spring Rate (lbs/in): 290 lbs./in.
Inside Diameter of Outer Spring (in): 0.900 in.
Inside Diameter of Inner Spring (in): 0.674 in.
Valve Spring Style: Standard

[Steve Wood]

They look fine to me...93# at 1.55".  Buick specs are ~67# at 1.727"

They are 290 on the spring rate and the factory are about 304.

These are definitely not roller cam springs and, if anything, are a hair softer than factory springs.  They should be fine.

[Guess]

Nah, it's a flat tappet cam.  I'll run by the engine shop to be certain which ones I had purchased.  I'm going off memory of which ones I ordered. 

[Guess]

Yeah I'm an idiot.  After a panic run to the engine shop, I have the Comp 980 springs.  Thanks for correcting my mistake.

[Steve Wood]

LOL

I wonder if the Crane springs would be better with regard to longevity being they are dual springs and have less tension on them individually?

[Charlief1]

I'm really suprised they haven't come out with a light weight beehive style spring for flat tappet. That would be the best option out there for a bunch of guys.

[Steve Wood]

There are some that don't believe that the beehive are as great long term as made out to be, but, I tend to agree with you, I would try them.

I am also surprised how "soft" these Crane dual springs are.  I don't see why they went that route for such low pressures.  I looked and thought at you that they were for a roller, but, I went to the Crane catalog and saw the specs.  Then I got out my calculator and saw they would need some shims for our cars if the specs were right.

Hopefully, Guess's mechanic will check the 980s to see if they need a shim before he wraps up the install

[bryes]

Thanks for the info everyone. Looks like I have more to consider than just whether to replace my valve springs or not!
 
 Ok, I have an update on the oil situation. I stated before that there was no oil on either side of the turbo compressor, well as it turns out I was wrong. In the pictures below I indicated where I did see oil. I think I missed it before because it was dark and the oil had time to drain away. Also, I did find oil in the  pipe to the throttle body (also pictured below).
 
 I am hoping that this is a good indication that the seal in the turbo is bad, and could be the primary source of my oil control issues (and not broken rings or piston!!). Let me know what you think.
 
 It is supposed to start raining here soon today so I received orders to get a few things done outside before working on the car. I'll hopefully still be able to get the head off later today and maybe post another update.
 

[Steve Wood]

keep your fingers crossed.  If the seal suddenly let go, then it could be the problem...get the heads off the engine and have a look at that bad cylinder in particular.

[bryes]

Well I have some good news and some bad news. The good news is that I have an excuse to buy some more tools! The bad news is that, as you can see below, I have a melted piston.
 
 
 It might be harder to tell, but the buildup on the side of the cylinder is the aluminum melted from the piston. It's also splattered on the valves and head as well.  It's hard to say how badly the cylinder is scored with the aluminum buildup there though, I'm just not sure.  Nothing that makes me think it would be impossible to hone out.
 
 Looks like the exhaust valve is torched pretty good also. The other two cylinders look to be normal to me. I'll have to work on getting the other head off tomorrow, but I don't think they are bad. Like the other 2 cylinders here, their spark plugs looked normal.
 
 What does everyone think about my options at this point and what they would do??
 
 Thanks!

[SuperSix]

Get the block checked - is it standard bore now? Cyl #2 looks a bit beat up too.

The heads should be fine - after they are decked, rebuilt/etc