Oil Pump studs

[BillyRx]

Hey has anyone removed oil pump studs? How are they installed and is it difficult to remove then. Any help would be appreciated. Thanks I'm doing my first rebuild of an old 40hp motor.
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63 Ragtop Beetle
63 Ragtop Beetle Ruby Red
63 double door panel

[Mark]

It shouldn't be hard at all. I just double-nut them to remove & install them.
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www.zwerks.ca

[BillyRx]

Thanks Mark they came right out. Will be putting in 37mm studs so I can torque the nuts down to spec.
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63 Ragtop Beetle
63 Ragtop Beetle Ruby Red
63 double door panel

[60sunroof]

[glutamodo]

he probably put in a HD pump that's thicker, and needed longer studs so he could get the nuts on all the way.

[65BAJA]

Where did you get those studs? I have an H case with the small short studs and they don't fully stick through the HD punp on the motor.
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All the good deals in the world will still make you poor.

I'll finish it!... Some day....
Edit, I started in 2003 and still haven't built a driving Baja. lol

[BillyRx]

Napa has the 37mm studs or they can order them for you
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63 Ragtop Beetle
63 Ragtop Beetle Ruby Red
63 double door panel

[glutamodo]

the last time I needed some longer M6 oil pump studs, I just bought some long fully threaded grade 8.8 bolts at the hardware store and cut the heads off, and cleaned then up with a tap.

[BarryL]

How are the oil pump studs supposed to be. Are the stud holes blind such that the stud will bottom out?

I got my long block back from a rebuild and noticed the studs were at different protruding lengths.

I contacted the builder and he said the case was already like that and it was fine.

Should I double nut them and try to turn them in like the closest one? The picture doesn't really show that good but one is really far out, one next far out, one medium, and one close.

I don't recollect seeing them ever stick out this far on other engines.

[tripicana]

No, you were already told they are not blind hole, and you risk running the stud past the opening and into the cam. You only need like 3 threads for full strength.
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[Glenn]

Wait till you put the tin on and then the pulley. From the length of these I suspect the pulley will rub.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"

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[BarryL]

[Pruneman99]

What size pump? A 30mm pump on a 40 horse case is not a good idea IMO. Probably 26mm max.

[Cusser]

I recommend a combination pump/oil filter unit. I have them on both my 1600cc and 1835cc engines in my VWs (almost 40 years on the 1835cc engine). They will fit 40hp engines too.
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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

[BarryL]

[BarryL]

Since the case is not blind holed and oil is sitting inside there what keeps oil from coming out the studs' threads as all there is is a wavy washer and nut unlike the oil screen cover that has copper washer and cap nut? I know thread locker or sealant but that stuff is not a perfect seal.

[mikedjames]

The oil is not under pressure behind the studs so it seeps down to join the river from the crank seal blowng back under the engine. Just stops rust.

My OG AS41 and AS21 cases both were drilled through.

My 2018 vintage Autolinea AS21 has blind holes .. which confused me when the bolts stopped going in on a CB Maxi 3 when the cover was about 0.05 inch short of being on the pump.
Lots of oil on the ground and no pressure...


Then had to hack the ends off the bolts in the field where I fitted the pump..at a Techenders VW T2 aircooled technical, camping and drinking weekend in the UK.
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Ancient vehicles and vessels

1974 VW T2 : Devon Eurovette camper with 1641 DP T1 engine, Progressive carb, full flow oil cooler, EDIS crank timed ignition.
Engine 1: 40k miles (rocker shaft clip fell off), Engine 2: 30k miles (rebuild, dropped valve). Engine 3: a JK Preservation Parts "new" engine, aluminium case: 26k miles: new top end.
Gearbox rebuild 2021 by Bears.

1979 Westerly GK24 24 foot racer/cruiser yacht Forethought of Gosport.
1973 wooden Pacer sailing dinghy

[ekacpuc]

[BarryL]

Thank you all for the knowledgeable answers.