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Rockers being removed.
  
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. |
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11-06-2013, 06:12 PM
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I understand from Mark Henry, that a good way to test the rocker bushing is to
stick a shaft in the rocker so that it is centered, and try to rock it. If there is no play your good to go.
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. |
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11-06-2013, 06:15 PM
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Set crank to TDC number 1 cylinder.
Locking the flywheel.   Cam bolt locking tool + 19mm socket  Bolt loosened 
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. Last edited by jpilcher; 11-07-2013 at 05:18 AM.. |
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11-06-2013, 06:22 PM
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13mm socket loosened Tensioner bolt
    
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. |
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11-06-2013, 06:26 PM
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    Keyway Removal 
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. |
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11-06-2013, 06:30 PM
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 Shim Removal 3 shims + heavy washer   
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. |
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11-06-2013, 06:33 PM
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Right side pretty much the same as left side.
    
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. |
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11-06-2013, 06:37 PM
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,249
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Looks good.
When I took mine apart it had 3 shims under the thrust washer on the left side and 4 on the right side. I read thats the default shim pack. I put the same cams back in after having webcam regrind them and I don't have the stromski tool for measuring cam sprocket alignment so I decided to put the shims back the way they were. I think they're the same shims that go in the middle of the alternator pulley to set fan belt tension. The fine threads on the top of a spark plug fit the little cam timing pin. |
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11-06-2013, 07:13 PM
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Good tip on the sparkplug tip JFairman. Were your shims under the large thrust washer? Mine were on top. Curious. Another item of note large washer had a bevel on it that faced the cam. Camshaft sprockets were oriented differently on left and right sides. Left side cup of sprocket facing out, Right side sprocket flat side facing out.
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. |
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11-06-2013, 07:31 PM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,640
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Quote:
Shims go on top of the thrust washer. Thought is that it makes it simple to remove a shim if needed when setting the parallelism of the chains. Otherwise you have to remove the thrust washer and then pull off (or add) a shim. You also want the thrust washer bearing against the cam, as that's its purpose- to handle the thrust/lateral load the cam puts on the sprocket. Its thicker than the shims and has the ability to bear the load.
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Kevin L '86 Carrera "Larry" |
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11-08-2013, 11:58 AM
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Thanks Kevin
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. |
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11-08-2013, 07:12 PM
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More progress on disassembly.
Received my cylinder stoppers from our host.  Cam end plate removal 3 - 10mm bolts  Rubber O ring needs replacing.  Chain box almost ready for removal 
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. |
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11-10-2013, 01:49 PM
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Chain box off.
 Loosened all the barrel head studs. Glad to report no broken studs.  Loosened the oil tubes  Removed the cam and placed in in plastic zip lock bag. 964 cam appeared to be in good shape. Head pulled up and off.  Carbon buildup on top of the pistons. What is the best way to remove? Bead blast? or solvent? 
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. |
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11-10-2013, 01:58 PM
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Now the million dollar question. Can these cylinders be reused without replating.
The cylinders are Nikasil cylinders. There is a total of 11 fins. There is a definite cross hatch on the cylinders walls. There appears to be some carbon staining at the top of the cylinders. Another question. Can the flame rings be cleaned up and re-used? I thought that the flame rings were used in high boost applications. Why did these fail? It's apparent that Cylinders 1, 3, and 5 were leaking. The history behind the car is unknown. I have owned the car approximately 1 year.
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. |
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11-10-2013, 02:12 PM
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 Right Cylinder Head off. Removed the cam first. Bagged it. One item of note. In order to get the barrel nuts removed, I had to remove the spark plugs. This was also done on the left cylinder head.  Cylinder Head 1 to 3. Are heads leaking due to air injection ports?  Cylinder Head 4 to 6 
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. |
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11-10-2013, 02:21 PM
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What is the best way to clean the case? I've been using an engine degreaser up till now, but not happy with the result. There appears to be some tough stains.
Want to find something a little stronger.
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. |
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11-10-2013, 02:32 PM
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Cylinder number 1 needs to have the spark plug thread repaired. Hopefully I can just run a tap through it.
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. |
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11-10-2013, 02:34 PM
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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,640
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Cylinder heads are not leaking due to air injection ports. Leaking due to poor clamping from the dilavar head studs. I'd recommend either ARP or Supertec's head studs.
Yep you can reuse the cylinders w/out replating, assuming they're in spec in terms of wear & ovality & piston-cylinder clearance. Only way to know that is to measure them. Clean up the nikasil surfaces with HOT soapy water and uniform circular/spiral scrubbing with red scotchbrite pad. Sounds crude but it does work. Soaking the pistons with WD40 works good to soften the carbon. Takes a long time- at least overnight if not more. Then you can scrape it off with a blunted stiff scraper. I have a "special" old flatblade screwdriver I use for this. :P Or if you're in a hurry, use something more aggressive like a fine bristle wire wheel on the drill. Protect the sides of the piston by wrapping with masking or packaging tape. Case takes some patience for sure. Probably one of the most involved rebuild tasks is case cleaning. Carb cleaner is effective but NASTY stuff. Use in well ventilated area. That stuff will kick your arse if not careful. Was helping a friend with his rebuild years ago w/a bunch of guys & we were cleaning stuff on the garage floor while others were standing up working on other things. Didn't take long for us to begin coughing sort of uncontrollably. It was the fumes from the carb cleaner settling on the floor area. Open windows in the garage weren't enough. Had to crack the garage door open a bit and let it air out/circulate. Best to have a fan going in the garage. Lesson learned & there go a bunch of brain cells i'll never get back.... Nowadays I use a soy based cleaner called Emerge made by Franmar. Very friendly stuff to yourself in terms of no nasty smell to kill your brain. Have to be sure to use it smartly. Like Simple Green, it mildly attacks aluminum if left on there for a very long time. You have to be sure to rinse the Emerge with water (rinses very easily) and I follow it up with soapy water. I like Dawn blue liquid dish soap. I think a good sign of a very effective degreaser is how well the crud comes off your cleaning brushes. When you rinse the emerge grease sludge, it comes right off your scrub brush and looks squeaky clean. Unlike other degreasers where your brush is now covered in greasy residue. Emerge *Concentrate* [DF] - $9.95 : Franmar Chemical Inc. Note that they actually make parts washing solvents too PARTS WASHERS : Franmar Chemical Inc. I only have experience with their Emerge. I'll be honest that I had the stuff on-hand from doing a mastic removal job in my basement. It's used as a final clean for their mastic remover. So I "blindly" discovered that the emerge is a kickass degreaser. BTW their paint remover rocks too. It removes paint, powdercoating and asphalt awesomely. Used it to remove the asphalt residue on the floor of my racecar after mechanically chiseling all that junk off the floor...... ugh.
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Kevin L '86 Carrera "Larry" |
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11-11-2013, 09:34 AM
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Thanks Kevin
Was planning on replacing the Dilivar head studs with Supertec studs. Also going to do the ARP rod bolts. Will try soaking the pistons in WD40, overnight. Cylinders are next on my list of things to remove. Can Flame rings be re-used? What is best way to clean out the grooves? Regards John
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1988 Porsche 930 Targa - 3.4L Twin Plug Motor, DC 13 Cams, Supertec Head Studs, ARP Rod Bolts, Port and Polished Heads, Garretson Andial Intercooler, GSX 61 BB Stage 5Turbo, Tial F46 WG .8 Bar Spring, PowerHaus Headers, Rarly8 Dual Tip Muffler, MS3 Pro EFI conversion, 85lbs. Injectors, Center Force Stage 2 Clutch , Rebuilt 4 Speed with LSD. Last edited by jpilcher; 11-11-2013 at 03:50 PM.. |
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11-11-2013, 09:50 AM
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Join Date: May 2005
Location: Loxahatchee, florida
Posts: 2,894
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it's easier to bead blast them if you have a blast cabinet
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's. 2019 Silverado 6.2L |
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11-12-2013, 08:37 AM
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Porsche 930 Targa
