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Moderator
Join Date: Dec 2001
Posts: 9,569
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Is this head salvage or scrap?
Looks like somebody got a little excited with the bead blaster.
Seriously, any use for this 2,0 head? Or is it a paperweight? All three photos are the same, just different zoom and flash.   
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'66 911 #304065 Irischgruen ‘96 993 Carrera 2 Polarsilber '81 R65 Ex-'71 911 PCA C-Stock Club Racer #806 (Sold 5/15/13) Ex-'88 Carrera (Sold 3/29/02) Ex-'91 Carrera 2 Cabriolet (Sold 8/20/04) Ex-'89 944 Turbo S (Sold 8/21/20) |
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03-20-2007, 05:35 PM
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Bead Blaster? Are you serious? Looks more like a shotgun blast...
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Chris ---------------------------------------------- 1996 993 RS Replica 2023 KTM 890 Adventure R 1971 Norton 750 Commando Alcon Brake Kits |
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03-20-2007, 05:58 PM
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E-85 sippin drunk
Join Date: Jan 2002
Location: Warner Robins, GA
Posts: 1,554
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I am sure you could knock out the valve seat, reweld the head, machine, and replace the valve seat.....
I would not, however, run it like that..... That almost looks like corrosion...not a bead blaster...
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Brad...930 gt-1 racecar, increased displacement to 3.6L, JB racing Cylinders, JE 8 to1 pistons, stroked crank, Carrillo rods, extrudehoned 3.2L intake, full bay Bell I/C, GT-2 EVO cams, Rarly8 headers, GTX-3584RS turbo, twin plug, P&P heads, Link G4 EFi system, G-50/50 with LTD slip and oil squirters/oil cooler, zork tube, full race coilover system, with carbon fiber body, full cage, E-85 sippin drunk |
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03-20-2007, 06:01 PM
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Registered
Join Date: Oct 2005
Location: MS/NH/PNW
Posts: 259
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It's corrosion that has been removed by the bead blast. I had some like that on the outside of my intake manifolds. The corrosion is pretty soft, so the beads blast it right out of the crevasses. Honestly, in a pinch you could run it, but if its a common head, I'd try to source a new one.
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Stephen GruppeB #906 1970 911T |
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03-20-2007, 06:26 PM
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Join Date: Oct 2001
Location: Momence, IL 60954
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I would say weld and remachine, then cryo. Should be as close to new as you are going to get on a 30+ y/o head.
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Charles Navarro President, LN Engineering and Bilt Racing Service http://www.LNengineering.com Home of Nickies, IMS Retrofit, and IMS Solution |
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03-20-2007, 09:20 PM
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Moderator
Join Date: Dec 2001
Posts: 9,569
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That's what I thought. As you can see from the casting number, this corrosion is on the exhaust side. The engine probably sat with water in it for a long time, and then when the heads were bead-blasted, it all eroded. Only two out of the six heads in this set are usable, but I got them for next to nothing. This one is a paperweight.
Noah, there are many applications for JB weld ranging from periodontia to birth control; this ain't one. 
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'66 911 #304065 Irischgruen ‘96 993 Carrera 2 Polarsilber '81 R65 Ex-'71 911 PCA C-Stock Club Racer #806 (Sold 5/15/13) Ex-'88 Carrera (Sold 3/29/02) Ex-'91 Carrera 2 Cabriolet (Sold 8/20/04) Ex-'89 944 Turbo S (Sold 8/21/20) |
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03-21-2007, 05:35 AM
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Registered
Join Date: Jul 2001
Location: Portland Oregon
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Quote:
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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03-21-2007, 10:33 PM
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Registered
Join Date: Dec 2003
Location: Arapahoe County, Colorado, USA
Posts: 9,032
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Quote:
 You should be able to easily find this head. With some effort you might be able to match the date. That corrosion is from water and other combustion products sitting there. The risk is the corrosion found its way around and under the valve seat. This reduces the heat transfer and the interference fit of the seat in the head. If you want to see real carnage, look at an engine that has "dropped a seat." Best, Grady
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ANSWER PRICE LIST (as seen in someone's shop) Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50 Last edited by Grady Clay; 03-22-2007 at 12:33 PM.. |
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03-22-2007, 12:18 PM
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JOT MON ABBR OTH
Join Date: Feb 2001
Location: USA
Posts: 3,238
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John,
That is NOT a paperweight!!! Obviously you have never seen a trot line weight.... Man, is that worth bringing back? I'd think the cost of replacing the 30 year old part would be more than the cost of repairing it, if the repair is possible with a reasonable amount of certainty...
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David '83 SC Targa (sold  ) MANLY babyblue honda '00 F250 7.3L (MINE!)'15 F250 Gas (Her Baby) '95 993 (sold )I don't take scalps. I'm civilized like white man now, I shoot man in back. |
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03-25-2007, 07:25 AM
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1970 Porsche 911 S 
