Damage to my Crane Rockers & Shafts (pics inside)
#487817
10/04/09 11:42 AM
10/04/09 11:42 AM
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Joined: Jan 2003
Posts: 2,402
Wichita,KS
Blakcharger440
OP
top fuel
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OP
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Joined: Jan 2003
Posts: 2,402
Wichita,KS
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Well here are some pics of the damage to one of my Crane rocker shafts and rocker. The depth of the the damage is very shallow as it probably is not even 002 or .001 deep if even that. The damage on the shafts is on the underside only where the oil holes are and in the rocker pic it shows the damage only in the bottom part of the rocker also. As you can see from the pics every one of the rockers has about the same amount of damage. What could be the cause of this???  I have a brand new set of Harland Sharp shafts and rockers sitting here but I dont want to install them without knowing what could have caused the damage to the cranes. I dont want to ruin the sharps also. This is the top portion of the rocker shaft.  This is the bottom part of the shaft.  Pic of the damage to inside bottom of the rocker arm. 
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Re: Damage to my Crane Rockers & Shafts (pics inside)
[Re: Blakcharger440]
#487818
10/04/09 11:55 AM
10/04/09 11:55 AM
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Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines
master
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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What is , open spring pressure, RPM operating range, useage of car, and cylinder heads?
How old and how long have these been running?
What prompted the inspection?
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: Damage to my Crane Rockers & Shafts (pics inside)
[Re: CompWedgeEngines]
#487819
10/04/09 12:06 PM
10/04/09 12:06 PM
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Joined: Jan 2003
Posts: 2,916
A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,916
A shed in England
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What heads are these on? Might be oil starvation if pic # 2 shows the even bank of rockers on a stock iorn head. As suggested it could be down to spring pressure too. Looks like you have some small geometry / pushrod length issues if you run the adjusters with that much thread showing, though this wouldn't cause the damage. Just my  hope this helps.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: Damage to my Crane Rockers & Shafts (pics inside)
[Re: CompWedgeEngines]
#487820
10/04/09 12:11 PM
10/04/09 12:11 PM
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Joined: Jan 2003
Posts: 2,402
Wichita,KS
Blakcharger440
OP
top fuel
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OP
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Joined: Jan 2003
Posts: 2,402
Wichita,KS
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Quote:
What is , open spring pressure, RPM operating range, useage of car, and cylinder heads?
How old and how long have these been running?
What prompted the inspection?
The cam is a Hughes solid 579/587 256/260 with open spring pressure is 370 @ 1.280
I doubt that I even have 100 miles on this engine with Stealth aluminum heads.
It is supposed to be a street/strip car.
I started to make sure my lash was adjusted properly and I noticed that my oil was blackened and had a very,very fine paste deposits on parts of my cylinder head.
Other than on the dyno I have never spun the engine over 4000 RPM as I wanted to make sure everything was going fine before doing so.
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Re: Damage to my Crane Rockers & Shafts (pics inside)
[Re: Tig]
#487821
10/04/09 12:12 PM
10/04/09 12:12 PM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
master
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master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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Banana grooved rockers would help. There is a guy on ebay that sells coated Moly shafts, that look very nice.
The Harlands are needle bearings so you should have much trouble.
How many miles were on these?
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Post deleted by Defbob
[Re: Bob_Coomer]
#487822
10/04/09 04:23 PM
10/04/09 04:23 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Re: Damage to my Crane Rockers & Shafts (pics inside)
#487823
10/04/09 05:14 PM
10/04/09 05:14 PM
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Joined: Jan 2003
Posts: 2,402
Wichita,KS
Blakcharger440
OP
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OP
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Joined: Jan 2003
Posts: 2,402
Wichita,KS
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Quote:
My gut tells me you are lacking oil pressure to your rocker shafts. Those feed holes aren't restricted, are they? If it were me, I would verify that good pressure is coming out of the feed holes, with the shafts removed.
How do I make sure I am getting oil to the rocker shafts? Right now I have the intake and carb off.
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Re: Damage to my Crane Rockers & Shafts (pics inside)
[Re: Chris2581]
#487826
10/04/09 06:29 PM
10/04/09 06:29 PM
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Joined: Jan 2003
Posts: 2,402
Wichita,KS
Blakcharger440
OP
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OP
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Joined: Jan 2003
Posts: 2,402
Wichita,KS
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Quote:
Quote:
How do I make sure I am getting oil to the rocker shafts? Right now I have the intake and carb off.
Pull the distributor and drive gear and spin the oil pump with a priming tool.You'll need to rotate the engine at times in between.Or you can use a remote starter button and do it that way with out pulling the dizzy.
I have a remote starter so I will not have to remove the distributor.
How long should I crank the engine until I see some oil come up through into the heads?
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Post deleted by Defbob
[Re: Blakcharger440]
#487827
10/04/09 07:13 PM
10/04/09 07:13 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Re: Damage to my Crane Rockers & Shafts (pics inside)
#487828
10/04/09 07:46 PM
10/04/09 07:46 PM
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Joined: Oct 2004
Posts: 6,293
Northeast, Alpine, NY
9 Sec Phill
On a road near you
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On a road near you
Joined: Oct 2004
Posts: 6,293
Northeast, Alpine, NY
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Just a couple of questions, #1 does the motor have head studs? If so im sure the the stud itself is to big(1/2") and cutting off oil flow to the rockers..DAMHIK..the stock bolt is under cut to give room for the oil to pass and get oil to the rockers. Running the stud cut oil flow almost 80% over the stock bolt. #2 Did you have the shafts on the right way, there is a front and a rear for the oil holes to line up... #3 Are the effected rockers from the front or rear of the motor? #4 Nice looking place you got there 
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Re: Damage to my Crane Rockers & Shafts (pics inside)
[Re: 9 Sec Phill]
#487829
10/04/09 08:24 PM
10/04/09 08:24 PM
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Joined: Mar 2007
Posts: 12,008
Finally a HUSKER again
Moparnut426
I Live Here
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I Live Here
Joined: Mar 2007
Posts: 12,008
Finally a HUSKER again
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I have seen the exact same result from good oil PSI, and everything good from using cranes shafts. They seem to chrome their shafts or something like that. In our dirt car running Brad penn oil, and 7200-8200 rpm all night long we say gaulding shafts. We finally spent the cash, bought the mopar performance bananna shafts, and the problem left. I just grooved the crane shafts just for one race to get us by until the shafts came in. I used a die grinder, and just made a slit on the preassure side of the shafts just like the mopar ones. I think the gaulding comes from the super hard chrome coatings, and the aluminum. Disimilar metals are the way to go, but when one is super hard plated, I think the chrome starts to flake starting a contact spot resulting in what you see there.
After I have used a non coated hard shaft I havent had any issues.
Hughes has some nice shafts also.
Kasey
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