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930 3.4 Engine Rebuild (lots of pics)
Hi Guys
I have decided to chronicle my engine rebuild. I performed a leak down test, and discovered cylinders 1 & 5 were leaking 20% and 30% respectively. Engine was running strong, but did make a phat phat phat sound. I will be getting Mark Henry to do the heads for me. He will also be giving me a hand with the re-assembly. Axles have been bungie tied, and I have a plastic bag around each hub. Engine Out   Electrical wires disconnect   
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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; 11-03-2013 at 04:29 PM.. |
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11-03-2013, 02:41 PM
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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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11-03-2013, 02:45 PM
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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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11-03-2013, 02:48 PM
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  Coils Off  Tins Off, Muffler Off 
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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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11-03-2013, 02:54 PM
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Wires Disconnected Oil Pressure Sender
 Turbo oil feed disconnect    Waste Gate 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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11-03-2013, 03:02 PM
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Pressure Switch disconnect, Temperature Sensor disconnect
 I removed fuel distributor, throttle body, intake manifold as one assembly.   Throttle Linkage plate 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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11-03-2013, 03:12 PM
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Shroud Pulled Up
 Left Side  Right Side  Turbo Feed Line Disconnect 
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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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11-03-2013, 03:34 PM
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All head studs appear to be intact. Looks like 993 studs were installed at some point.
 Head Gasket Leak Cylinder #1 - 20% leak down  Head Gasket Leak Cylinder #5 - 30% leak down  
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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; 11-03-2013 at 04:34 PM.. |
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11-03-2013, 03:40 PM
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    Missing one shim 
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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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11-03-2013, 03:43 PM
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 Removed nut off back of alternator to expose alternator wires.  Alternator wires disconnect.  Alternator removed  Long block 
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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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11-03-2013, 03:48 PM
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Let the cleanup begin. Clutch removed.
  Getting ready for engine stand.  Got my 2 neighbours to give me a hand lifting it onto engine stand. 
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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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11-03-2013, 03:56 PM
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Exhaust nuts came off with very little drama. I mixed up some ATF and acetone.
Sprayed nuts, and let it sit for about 4 hours. Cracked the nuts with no issues. Previous owner had used copper nuts. A few of the exhaust studs came out.  Exhaust off  Large crack on exhaust heater box. Need to get this checked 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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11-03-2013, 04:02 PM
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Cam case oil feeds removed.
  Cam Bolt Removal tool ordered from our host.  Cam Cases Exposed  
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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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11-03-2013, 04:08 PM
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Plan on removing the cam bolt and chain cases tomorrow night.
Question. Do most of you guys follow the Bentley procedure or Wayne's procedure? The Bentley procedure suggests that the rockers for both intake and exhaust be removed. Wayne's procedure suggests that the valve lash adjustment screw be backed off. I guess I need to remove the rockers anyway. Let me know your thoughts. Also do you remove the cam towers with the heads? Thanks J
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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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11-03-2013, 04:20 PM
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Also what is the best way to remove the tensioners? Compress the plunger. Lock 3mm locking pin, remove bolt. Remove assembly?
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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; 11-03-2013 at 04:28 PM.. |
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11-03-2013, 04:26 PM
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What kind of cylinders do you have there? Is it me or why there are no cooling fins?
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'83 924 (2.6 16v Turbo, 530hp),'67 911 hot-rod /2.4S, '78 924 Carrera GT project (2.0 turbo 340 hp), '84 928 S 4.7 Euro (VEMS PnP, 332 HP), '90 944 S2 Cabriolet http://www.facebook.com/vemsporsche |
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11-04-2013, 12:38 AM
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Cylinders are Mahle 3.3 Turbo cylinders. Fins are on the bottom exhaust 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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11-04-2013, 04:35 AM
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Join Date: Jul 2001
Location: Suntree, Florida, USA
Posts: 2,261
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Nice work so far JPilcher! You can back off the screws and pull the entire assembly off the engine without removing the rockers, etc. (heads, cam carrier, and all this little parts still attached) It is a little easier to remove everything and keep track of it while working on the bench. As for the tensioners, you probably won't get the pin in there until you are ready to reassemble. A little gumption and some finesse and you will be just fine. Keep track of the shims on the cam sprockets. Slow and steady wins the race. Do you plan on splitting the case or just a nice top end rebuild?
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JB - BreitWerks www.breitwerks.com 321-806-8664 Engine Rebuild & Restorations |
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11-05-2013, 06:23 PM
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Tonight I went ahead and removed the rockers as per the Bentley manual.
Bagged and tagged the rockers. I will try and get some pictures uploaded. Rockers were in not bad shape. Bronze guide had a little wear, but nothing too severe. Has anybody used the RSR seals? My plan at this point is to do a full rebuild. I ve read a lot of horror stories About top end rebuild that have gone bad.
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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; 11-05-2013 at 07:31 PM.. |
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11-05-2013, 07:29 PM
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911 2.2 T targa
Join Date: Jun 2012
Location: Netherlands
Posts: 89
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RSR seals are a cheap and easy upgrade to prevent oilleaks from the rocker shafts. I sea no reason why not to do it.
Keep those pictures coming!!!! |
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11-06-2013, 01:10 AM
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Porsche 930 Targa
1981 Porsche 924 "Turbo" [SOLD]
1983 Porsche 924 2.5 16V Turbo
"Gulf"
1995 Audi A8 4.2 Quattro
1967 Porsche 911 hot rod
