Reservoir Venting

Gents:

From an Apex post:

https://www.apexspeed.com/forums/att...d=114420&stc=1

Thoughts on venting the reservoir. And if advisable, best location recommendations, please.

I always vent all fluid reservoirs to catch cans and not just to atmosphere or ground. Cleaner and safer.

Yep.

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Originally Posted by mikey

I always vent all fluid reservoirs to catch cans and not just to atmosphere or ground. Cleaner and safer.

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Originally Posted by mikey

I always vent all fluid reservoirs to catch cans and not just to atmosphere or ground. Cleaner and safer.

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Isn't the back half of the bellhousing the catch can already?

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Originally Posted by Spengo

Isn't the back half of the bellhousing the catch can already?

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Depends on whether it was modified as expanded oil capacity.

For the most part it worked 'poorly' and was better utilized for expanding the oil tank.

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Originally Posted by BeerBudgetRacing

Depends on whether it was modified as expanded oil capacity.

For the most part it worked 'poorly' and was better utilized for expanding the oil tank.

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I thought it was a funny design when I discovered that but who am I to question real racecar engineers? :rolleyes:

I just discovered mine was blocked and capped off from previous owners. Currently just have a hose going into a water bottle mounted at the wing. Im debating on hooking this cavity back up or just upgrading to a little more official external catch can.

I have also been told that the internal cavity catch sometimes starts to not be very reliable. Which one do you guys recommend?


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the can still needs to be vented, either with a loose hose entry or a dedicated hose off the top and over the side. Otherwise you are going to build pressure in the system.

I have had many late model VD - all using the factory catch tank with no issues at all. Yours is already vented with small filter. I believe all of the ones I have seen also are vented through the four small holes in the top of the casing above the tank - YMMV

We run a separate catch bottle per GCR for the water but not the oil - we drain the overflow tank after every event and if it doesn't have anything in it we raise our oil level. Typically we run 2-2.5 inches above the input shaft tube.

If you have leakage problem it is likely not a design issue.

JM

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Originally Posted by Rick Iverson

Gents:

From an Apex post:

https://www.apexspeed.com/forums/att...d=114420&stc=1

Thoughts on venting the reservoir. And if advisable, best location recommendations, please.

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94/95 VD here. The stand up tube on top of the bellhousing that is used for adding oil, or checking oil level via a dip stick when the engine is running, has a tap about half-way up its side for a tube that leads down to a catch can. I guess it could be called a vent. The same catch can has a place in its top for a tiny tube's entry that leads from the tranny

Stan, Bingo

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Originally Posted by EYERACE

94/95 VD here. The stand up tube on top of the bellhousing that is used for adding oil, or checking oil level via a dip stick when the engine is running, has a tap about half-way up its side for a tube that leads down to a catch can. I guess it could be called a vent. The same catch can has a place in its top for a tiny tube's entry that leads from the tranny

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Stan:

I was thinking about this.

The oil return/fill port housing atop the reservoir also functions to vent fluids to the catch tank. But I think perhaps the aft portion of the reservoir still needs to be vented. Thoughts?

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Originally Posted by EYERACE

94/95 VD here. The stand up tube on top of the bellhousing that is used for adding oil, or checking oil level via a dip stick when the engine is running, has a tap about half-way up its side for a tube that leads down to a catch can. I guess it could be called a vent. The same catch can has a place in its top for a tiny tube's entry that leads from the tranny

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Originally Posted by Rick Iverson

Stan:

I was thinking about this.

The oil return/fill port housing atop the reservoir also functions to vent fluids to the catch tank. But I think perhaps the aft portion of the reservoir still needs to be vented. Thoughts?

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You would need to provide some serious baffling inside the reservoir to prevent oil from filling the catch tank and starving the engine.

I would be very cautious before proceeding with a mod like this to prevent a disaster.

Fellas:

Much ado about nothing. If it was needed, the designers and engineers would have put one in.

Thx for the input.

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Originally Posted by EYERACE

94/95 VD here. The stand up tube on top of the bellhousing that is used for adding oil, or checking oil level via a dip stick when the engine is running, has a tap about half-way up its side for a tube that leads down to a catch can. I guess it could be called a vent. The same catch can has a place in its top for a tiny tube's entry that leads from the tranny

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Quote:

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Originally Posted by Rick Iverson

Stan:

I was thinking about this.

The oil return/fill port housing atop the reservoir also functions to vent fluids to the catch tank. But I think perhaps the aft portion of the reservoir still needs to be vented. Thoughts?

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Originally Posted by DaveW

You would need to provide some serious baffling inside the reservoir to prevent oil from filling the catch tank and starving the engine.

I would be very cautious before proceeding with a mod like this to prevent a disaster.

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