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#1 |
Senior Member
![]() Join Date: May 2006
Location: Philadelphia, Pa. 19454
Posts: 9,516
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Hello, my name is jaros44sr and I have a problem...
Well it all started several weeks ago and I'm at a loss...
Seems like #4 cylinder exhaust rocker arm is sitting askew compared to the rest of them! Don't think its a bent pushrod as I spun the rod and don't see any wobble, maybe a collapsed or sticky lifter. Could just one rocker arm be worn out or out of adjustment? Seems like all the nuts are adjusted about the same depth. If its the rocker arm Jeg's has stamped roller tipped (1.6 ratio) on sale till the end of June for 90 bucks. Maybe worn cam lobe, but always thought it was # 7 or #8 that was the problem I've used a probe and don't feel any burr on the valve stem above the keeper, so I'm confident that this is something that just happened recently. Maybe I should pull the intake to get a better look People said not to pay attention to it, but that is just not me. If something is differant, I think it needs some sort of attention...lmk what you think SB 350 with a hydraulic cam, probably well used engine, but idk. I'm sure it needs a rebuild, but just wanted to get the restore done with this engine in it Any thoughts would really help, I don't want to ignore the situation
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Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim Last edited by jaros44sr; 05-31-2010 at 01:12 PM. |
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#2 |
Trucks N Tranzams
Join Date: Dec 2002
Location: North Las Vegas, Nevada
Posts: 816
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Re: Hello, my name is jaros44sr and I have a problem...
What is the compression in the cylinder in question? Is the rocker arm stud bent? Waht does the hardware look like on the arm...I.E. The ball and arm?
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![]() '68 Chevy LB 383 TH400/GV/373 posi '56 Chevy 4WD SWB '64 Chevy short stepside '79 Trans Am 455/TH2004R/12blt/4whldisc 95 Kia (Wifes car) 2002 S-10 extended cab pickup "God punishes small sins immediately" Last edited by Arad68; 05-31-2010 at 02:00 PM. Reason: More info |
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#3 | |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Hello, my name is jaros44sr and I have a problem...
Askew which way? pictures? What year is this engine? Vortec heads?
The bent stud sounds the most likely from the discription at this point, but how would that have happened? The cam or lifter cannot effect the way the rocker arm sits, only the three points where it touches, the pushrod, the valve stem, the stud/ball can do that.
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You can review the site's rules here. Quote:
Bad planning on your part does not necessarily constitute an instant emergency on my part.... The great thing about being a pessimist is that you are either pleasantly surprised or right. ![]() Last edited by LONGHAIR; 05-31-2010 at 02:18 PM. |
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#4 | ||
Senior Member
![]() Join Date: May 2006
Location: Philadelphia, Pa. 19454
Posts: 9,516
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Re: Hello, my name is jaros44sr and I have a problem...
Quote:
Quote:
Haven't done a compression test yet Haven't disassembled, so the condition of the parts are yet to be determined No vortecs, year about 80's, askew to the rear of the engine. Pics to follow
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Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim |
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#5 |
Senior Member
![]() Join Date: May 2006
Location: Philadelphia, Pa. 19454
Posts: 9,516
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Re: Hello, my name is jaros44sr and I have a problem...
2.130" outside demension on studs, #2 and # 4 cylinders
Please don't laugh at the condition of the inside of the engine, buildup was due to the PO running the engine with a leaking fuel pump ![]()
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Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim |
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#6 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,940
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Re: Hello, my name is jaros44sr and I have a problem...
Looks like a lot of metal in the oil... I'd say some cam lobes are going flat.
Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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#7 |
Registered User
Join Date: Mar 2010
Location: murrieta, ca
Posts: 7
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Re: Hello, my name is jaros44sr and I have a problem...
Is the pressed in rocker arm stud starting to pull out of the head?
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#8 |
Senior Member
![]() Join Date: May 2006
Location: Philadelphia, Pa. 19454
Posts: 9,516
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Re: Hello, my name is jaros44sr and I have a problem...
didn't know they were pressed in, but that makes sense
__________________
Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim |
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#9 | |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Hello, my name is jaros44sr and I have a problem...
It looks like a combination of a stud pulling out and a flat cam. All of that metal came from somewhere....and gas-diluted oil would be a good reason for a bad cam.
__________________
You can review the site's rules here. Quote:
Bad planning on your part does not necessarily constitute an instant emergency on my part.... The great thing about being a pessimist is that you are either pleasantly surprised or right. ![]() |
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#10 |
Back in the sticks
Join Date: Jan 2001
Location: Fordland, MO
Posts: 3,188
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Re: Hello, my name is jaros44sr and I have a problem...
Wish I had some advice, but I'm just glad you found it now instead of running down the road several hundred miles from home!
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1971 Cheyenne C-10 w/700R4 and Tuned Port Injection 1969 K5 Blazer w/Tuned Port 2010 2SS/RS Flaming Orange Camaro 2011 K1500 Suburban 2014 K1500 Pickup 2008 Nissan Altima? The wifes' hoopty |
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#11 | |
Registered User
![]() Join Date: Aug 2001
Location: SOMERSET KY.
Posts: 6,427
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Re: Hello, my name is jaros44sr and I have a problem...
Quote:
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junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. ![]() LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST |
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#12 |
Registered User
![]() Join Date: May 2006
Location: Wyman, Kentucky
Posts: 403
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Re: Hello, my name is jaros44sr and I have a problem...
You might want to check the stud Jaros, if that rocker has run like that for some time it usually cuts a groove in the stud. Good luck.
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1972 GMC Jimmy, 4WD, 454 CI, 350 Turbo, 4" lift, 35" tires The math teacher said my son "Bubba" could be a mathmatical genius. cause he's got 13 fingers! |
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#13 | |
Kill Bill...et
Join Date: Aug 2008
Location: Winchestertonfieldville, Wa
Posts: 366
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Re: Hello, my name is jaros44sr and I have a problem...
Quote:
Happened to me! Pulled studs, tapped, and installed screw in studs. My rocker had eventually slipped almost all the way off the valve and was kind of jammed into the gouge. Had this in a couple of spots, some studs that were pulling, and a few bent push rods. I suspect the PO smashed the skinny pedal to the floor too often and too long. Last edited by stevencvn72; 06-09-2010 at 11:11 AM. |
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#14 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,940
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Re: Hello, my name is jaros44sr and I have a problem...
Only way to get all the particles out is to tear the engine down completely...
Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
Quote:
Last edited by GASoline71; 06-09-2010 at 02:03 PM. |
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#15 |
Registered User
Join Date: Jan 2009
Location: topeka, ks
Posts: 49
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Re: Hello, my name is jaros44sr and I have a problem...
Do you have to drill out the stud hole, or can you just tap it after you remove the stud. Do you need a bottom tap
on mine you pull out the old stud and mill the top of the stud boss to a certain height. it also depends if you are running guide plates. you then drill the holes on a drill press holding the head at the correct angle, tap the holes, and install the studs with thread sealant (there is coolant behind stud) and your done. Last edited by sinned4me; 06-09-2010 at 09:01 PM. |
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#16 | |
Senior Member
![]() Join Date: May 2006
Location: Philadelphia, Pa. 19454
Posts: 9,516
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Re: Hello, my name is jaros44sr and I have a problem...
Quote:
__________________
Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim |
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#17 |
Registered User
Join Date: Nov 2007
Location: Marion, IL
Posts: 112
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Re: Hello, my name is jaros44sr and I have a problem...
Replace the rocker arm with a self aligning rocker arm.
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#18 |
Senior Member
![]() Join Date: May 2006
Location: Philadelphia, Pa. 19454
Posts: 9,516
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Re: Hello, my name is jaros44sr and I have a problem...
OK, I'm game...what's that and where do I get one
__________________
Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim |
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#19 |
Kill Bill...et
Join Date: Aug 2008
Location: Winchestertonfieldville, Wa
Posts: 366
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Re: Hello, my name is jaros44sr and I have a problem...
I never even removed my heads. Pulled the old stud. And tapped the hole very slowly using grease and a magnet to catch shavings. No it's not the right way, but it can be done. Oh yeah, if you use shoulderless screw in studs, there's no need to mill down the stud boss. Just use thread sealer and jam nuts.
Last edited by stevencvn72; 06-10-2010 at 12:53 AM. Reason: I forgot! |
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#20 | |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Hello, my name is jaros44sr and I have a problem...
It's not as easy as that. The original "alignment" was done from the pushrod side. This is either from the slots in the heads, or from the guide-plates that are retained by the screw-in style studs...But if you try to control the rocker arm from the valve stem side (self aligning rocker arms) and the pushrod side at the same time, there will be binding of some kind. Not good....
__________________
You can review the site's rules here. Quote:
Bad planning on your part does not necessarily constitute an instant emergency on my part.... The great thing about being a pessimist is that you are either pleasantly surprised or right. ![]() |
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#21 |
Cruzin
Join Date: Dec 2009
Location: on the road
Posts: 2,835
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Re: Hello, my name is jaros44sr and I have a problem...
X2 my 85 was doing the same thing we pulled the head and took it to the machine shop and found nothing, he told me to get self aligning rocker arms i got them at the local parts place told them late 90's v-8 i believe but i have had no more problems with that anymore and that was 5 or 6 years ago
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Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14
Last edited by Hubscrub; 06-10-2010 at 08:43 PM. |
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#22 |
Senior Member
![]() Join Date: May 2006
Location: Philadelphia, Pa. 19454
Posts: 9,516
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Re: Hello, my name is jaros44sr and I have a problem...
All right guys, I'm getting conflicting thoughts here, I'm not saying these self-aligning rocker arms aren't good, or that they didn't work for you, I'm just not ready to try something new to me
Seems like the best fix so far is to pull the stud, freeze the new stud and tap it in and pin it. Then buy a new rocker arm, ball socket, push rod What do you all think, you've been great so far helping me with the problem
__________________
Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim |
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#23 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,940
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Re: Hello, my name is jaros44sr and I have a problem...
Old school way would be to "pin" a new press in stud in place. Insert new stud and drill a hole through the side of the boss and through the stud... then tap in a roll pin.
Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
Quote:
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#24 |
Senior Member
![]() Join Date: May 2006
Location: Philadelphia, Pa. 19454
Posts: 9,516
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Re: Hello, my name is jaros44sr and I have a problem...
That sounds doable, so are you able to tap in the new stud with a 3lb brass sledge
__________________
Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim |
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#25 |
Registered User
Join Date: Nov 2007
Location: Marion, IL
Posts: 112
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Re: Hello, my name is jaros44sr and I have a problem...
I had the same type of rocker arm misalignment which wore a slot in the stud. I tried several new pushrods and rocker arm/ball sets, they all misaligned almost immediately. I used one self aligning rocker arm. I guess that the wear in the push rod bore and the "slack" in the rocker arm are such that there is no bind. I have driven it every day for more than a year without incident. I did checked the pushrod to make sure there was no scuffing from the pushrod bore and no abnormal wear on the self aligning rocker arm. I agree that there is a may be a chance for a bind so I would make sure to inspect it after I ran it for a few miles.
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