Oil pump woes

[Aqueous1025]

I am working on a 72 beetle sedan. It does have an engine number starting with UO so I’m guessing a converted type 3 engine. I’m almost ready to split the case but ran into a problem. How to pull the oil pump? I ordered a tool but it said back ordered after I ordered it. Is there a safe way to pull the oil pump without this tool? Also while searching I realized that the cam I am putting in is an Empi gt1 which has a flat cam. I could not find an oil pump for a flat cam for 72 and later 1600cc dual port engines? What do you do for an oil pump if you put a performance cam in a 72 or later engine with a flat cam?

Thank you and sorry I have not worked on a vw before but I am an experienced mechanic. I find it better to ask for help rather than just fumble through it.

[chrisflstf]

Loosen the case bolts above and below the oil pump. Use a large pair of channel locks to wiggle the pump out. Might help to remove oil pump studs also

[Rome]

Since you plan to split the case, you don't need any special tools to remove the oil pump.

Drain the oil from the case out the bottom sump plate center large bolt.

Loosen all of the perimeter nuts/bolts of the case. Most are M8 with 13 mm wrench size. Watch out for the two nuts on the right side of the case, down along the side face near the flywheel side. Those also have to be loosened and are often overlooked because dirt hides them. You can see the upper of the two studs on which the nuts are placed at the upper right of this photo. The other stud/nut is beyond that half-rounded "boss" on the case.

Then remove the 6 main nuts on the right case half which you can see in the photo above. 17 mm wrench/socket size.

DO NOT PRY THE CASE HALVES APART WITH A PRYBAR OR SCREWDRIVER! Doing so will put a scratch or gouge into the machined surfaces which can cause an oil leak when the engine is running again.

Each side of the case half has a protruding section/tab. Place a block of wood against one tab, then tap the wood with a hammer. Do the upper protrusion, then the bottom one. At this point you should see the case halves start to separate, but only by a "hair". Now you can pull the oil pump out because you've taken away the friction fit at the pump opening. There's enough clearance of the oil pump studs to the 4 holes in the pump housing to pull the pump out by hand, or use a soft mallet on the side of the pump housing in case the housing was held in place with lots of sealant/gasket cement. No need to remove the oil pump studs.

After removing the pump, continue tapping those case tabs with the wood. The case will separate more and more. Lay the case over to the left against the left head studs so that it sits tilted up to the right. Pull the RIGHT case half off the left half. The cam and crank will thereby stay in the left case half, but all the lifters from the right half will fall out.

Are you using a VW-specific repair manual to guide you with disassembly and reassembly?

[Cusser]

I had to grind down one of the "arms" on the oil puller I purchased decades ago, to get it to fit in. Mine looked similar to this.

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1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297

[Aqueous1025]

Thank you so much for the information in the replies. I’m still a little confused about what oil pump I need with the cam stating I need an oil pump for a flat cam not a dished cam. All the oil pumps listed for use in 72 or later engines say they are made for a dished cam gear and not a flat cam gear. At least all the oil pumps I have seen so far searching for an oil pump for a 72 or later vehicle.

Again thank you for all the great information on getting the oil pump out and splitting the case.

[chrisflstf]

Cb perf has oil pumps for flat and dished cams

https://www.cbperformance.com/Oil-Pumps-Accessorie...rlAWMMcS4t

[67rustavenger]

Once you have the oil pump out it will become very apparent to you if it is a dished cam or a flat cam gear.
A dished cam gear will have a recess.
A flat cam gear will be pretty close to well, flat.

Most aftermarket cam gears are flat.
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[mikedjames]

TheCB Maxi-3 I bought and used with s dished cam was manufactured with the drive shaft sitting 2mm below the face of the driven pump gear. I bought a new engine with a flat cam gear and had a problem. But I found a solution.
If the driven pump gear is stood on a block of metal or flat anvil and the drive shaft tang is carefully hit tpwards the metal block with a hammer ( maybe using a piece of something sacrificial between the hammer and the tang) , the drive shaft moves until it is flush with the gear. This 2mm difference seems to be the difference between dish snd s flat cam.

It has worked perfectly since.
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