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Registered
Join Date: Jan 2004
Location: CT
Posts: 11,552
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Help- Removing Rocker Arms
I have torn down several older engines for parts over the past year. I often find the rocker shaft nuts to be over-tightened and I end up stripping the heads on the nuts when I try to loosen them. I use the correct size allen wrench but the nuts are often rusty and strip easily.
Is there some way to prep the nuts and shafts (heat/penetrant) to make them easier to loosen and remove?
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Tom Butler 1973 RSR Clone 1970 911E 914-6 GT Recreation in Process |
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12-11-2006, 08:47 AM
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3.4 Bigger is better
Join Date: Nov 2003
Location: South Dakota
Posts: 1,497
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Kroil works the best of the ones that I have tried. www.kanolabs.com.
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Michael 88 911 Diamond Blue CE Carrera 3.4 HC3.4 member 2020 Honda Passport |
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12-11-2006, 10:35 AM
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Czar of C.R.A.P.
Join Date: Jul 2003
Posts: 2,323
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At the sake of making a dumb reply I will proceed anyhow. There are two sizes of allens the large nut and the small bolt. Only use the large nut for holding. Loosen using the smaller bolt. The allen is also formed deeper on the small bolt. This counter intuitive to me on my first shot at taking out the rocker. Seems like you should use the largest option but in this case you should only turn the smaller bolt.
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66 912 Coupe 84 Carrera Cab Hardtop HC3.4 Hyper Carrera 2005 Dodge Magnum 5.7 HEMI Cabriolet Racing And Performance C.R.A.P. Gruppe #1 Put on some C.R.A.P. and drive.... |
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12-11-2006, 10:48 AM
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Location: CT
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I always work the small nut and it strips about 25% of the time on early engines.
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Tom Butler 1973 RSR Clone 1970 911E 914-6 GT Recreation in Process |
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12-11-2006, 02:31 PM
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Join Date: Apr 2006
Location: Newcastle, WA
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I am ready to hear how bad this technique might be, but I couldn't get an 8mm allen into cyl 4 rocker shaft because the chain housing was in the way, so I used an impact wrench with a 5mm allen head and two long extensions that I carefully fed through the camshaft housing. Just a few bursts and the bolt cam right out. I didn't have anything counter holding the 8mm nut.
Ok let me know if this was a bad idea, but it worked and the hardware came out without any damage.
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James 1969 911E Slate Grey 1981 911SC Wine Red 1997 911C4S Ocean Blue |
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12-11-2006, 07:02 PM
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drives fast
Join Date: May 2003
Location: Las Vegas, NV
Posts: 1,012
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i tried to kill a nut with a small can of WD-40 once.
Kroil looks interesting...
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Capt. Crunch juanferrer405@gmail dot com |
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12-11-2006, 08:17 PM
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Join Date: Mar 2005
Posts: 743
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Hello all.
My take: Use a NEW UNBRAKO or other really good Allen key. Grind the end off regularly to give a new set of points on the hexagon. Use Plus-gas . I'd say I can get 23 out of 24 out no problems: the main issues seem to be previously damaged inhex from worn Allen keys. Kind regards David |
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12-12-2006, 02:00 AM
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Couldn't that stuff (dont know the name) that is used for giving extra grip to philips screwdrivers be used with allen keys?
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Magnus 911 Silver Targa -77, 3.2 -84 with custom ITBs and EFI. 911T Coupe -69, 3.6, G50, "RSR", track day. 924 -79 Rat Rod EFI/Turbo 375whp@1.85bar. 931 -79 under total restoration. |
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12-12-2006, 10:56 AM
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I soaked all of mine in PB Blaster for two days and used a new allen wrench and some muscle. Good luck.
Alex
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Its easier asking dumb questions than fixing dumb mistakes 1974 Porsche 911 Coupe, RSR Project 1976 Porsche 911 Targa, Black 1986 Porsche 911 Carrera, Black 2006 Porsche Cayenne S, Black |
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12-12-2006, 06:51 PM
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up-fixing der car(ma)
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Simple, but make sure the 5mm allen goes deep into the bolt. A lot of times the hex heads are filled with crap and it prevents you from getting a good bite on the bolt. Use PB or Kroil without a doubt.
Best,
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Scott Kinder kindersport @ gmail.com |
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12-12-2006, 08:50 PM
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1977 Porsche 911 Targa 2.7s
