Buying new oilpump - Camshaft?

[Moondrip]

Hi!

I´m on my way to buy a new oilpump with attachable oilfilter. But when I read about it, it looks like it´s only doable depending on which type of camshaft I have installed. If it´s dished or has 3 or 4 bolts. HOW can I know this?

For example: "OEM VW 30mm Full Flow Oil Pump, Fit Dished Camshafts (4 Bolt Cams)."

Picture to show what kind of pump I´m talking about:

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Old piece of junk!

[Bashr52]

What is the code on your engine?

[Moondrip]

[Zundfolge1432]

[ashman40]

I think the only real answer is to pull your current pump and look at the face of the cam gear. Once the pump is removed you can just look if it had 3 or 4 rivets/bolts. You should see one or the other of these:

The cam on the left (4 rivet) has a "dished" area allowing the pump to sit deeper into the case. These will fit the later pumps.
The cam on the right (3 rivet) has a flat face for the earlier pumps.

Knowing the year of the case might help if you were certain it had an original cam installed. But if the case has ever been opened it is possible the cam and pump have been replaced. Since all performance cams are built on the earlier (flat) cam style, there are high volume pumps that work with the later cases (larger passages) that interface with flat gear cams. So knowing the year of the case is not a definite way of knowing.
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AshMan40
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'67 Beetle #1 {project car that never made it to the road }
'75 Beetle 1200LS (RHD Japan model) {junked due to frame rot}
'67 Beetle #2 {2019 project car - Wish me luck!}

[Zundfolge1432]

[Moondrip]

Ah OK so it´s fully visible when the oilpump is removed, that I didn´t know. Well that´s the best advice there is.

And ofc I can´t be certain that previous owners haven´t replaced the cam.

Many thanks
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Old piece of junk!

[Cusser]

Yes, look at Ashman's post above.

The difference in the oil pumps themselves (like the CB Maxi2) is that the shaft on the oil pump gear protrudes farther for use with the dished camshaft gear. I have the Maxi2 in both my VW engines; I was surprised that the original engine in my 1971 convertible had a flat camshaft, so good thing I waited to check that before I ordered my Maxi2 so I could get the correct one.

I also had to clearance the pump on mine to get the tin to fit without rubbing the pulley

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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

[Moondrip]

Oh bollocks...

So in order for me to have a look I first need to drain the oil, remove the pump, have a look, bolt the pump back and refill the oil?

Or cna I just lift the rear up as high as possible and then remove the pump with out too much oil sipping out?

Do notice the motor is attached to a beach buggy
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Old piece of junk!

[Bashr52]

I've pulled the pump before by jacking the rear way up in the air. Probably better to just drain it though, you need to make sure the pump sealing area to the case is clean to get a good leak-free seal.

Unless someone has installed a 4 rivet cam in your engine for some reason, chances are you have a 3 bolt. Only way to verify would be to pull the pump though.

An AD code engine was originally installed in a bus between 71-73.

[wet_bread]

Do less work. Just pull the oil pump cover, remove the gears, and measure the gear length and shaft+gear length. Reseal with a new gasket onto a cleaned pump and cover flange.

Yes you'll have to drain the oil for this, so just do it at the next oil change maybe??

Give us the length in mm and we'll tell you what you have. That way you can buy the special VW oil pump puller at the same time as the correct pump.

[ashman40]

[Q-Dog]

You said this is a buggy? Why do you need to put the oil and old pump back in? Why can't the car sit for a few days and just install the new pump when it comes in?

If you must keep the car on the road, order one of each pump. Then just install the correct one once you remove the old one ... and return the pump you don't use.
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Brian

'69 Dune Buggy
'69 Beetle Convertible
'70 Beetle

[Floating VW]

[anthax]

What engine do you have, and why the need of a huge 30mm pump?

I hope you are aware that a 30mm pump will steal hp and build a lot of heat when it dumps excessive oilflow back through oil preassure regulators to the case, without the trip through the oilcooler.

If it its the filtration you wants, fullflow the engine instead.

[Bashr52]

[Cusser]

[jr1984]

Will the filter pump clear the moustache bar on a 71 stock 1600 bay bus?

[ashman40]

[heimlich]

Take the oil pump out and look at the cam. Here is a link to the CB performance page where they describe what to look for.

If you have 4 bolts it is easy. If you have three you need to look at the bolts. Mine was 4. I took a pen and marked one and then moved the crank and counted the number of bolts until I came back to the one I marked. Count twice to make sure. Move the crank slowly to make sure you don't miss one.
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