Crazy oil cap

[Janesfam]

My gsx came with this crazy ass oil cap. Never seen one and can’t find them anywhere. As cool as this thing is, it isn’t tight, and oil leaks past it and onto the valve cover. I’ll be trying to rebuild it to make it functional but has anyone seen an oil cap like this in case I can just buy another one?

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[FIBA M - EC17PSE]

That looks like an older HAL breather oil cap. They not made now by him but another member Tony made some similer.

If yours leaks maybe the seal needs to be replaced or the internal retainer arms needs to be bent to make it tighter. Inside the cover

 

[Janesfam]

That looks like an older HAL breather oil cap. They not made now by him but another member Tony made some similer.

If yours leaks maybe the seal needs to be replaced or the internal retainer arms needs to be bent to make it tighter. Inside the cover

Thanks dude I’ll be taking it apart in the next day or so and try to fix it. Was wondering if I could buy a replacement or a backup. Does this tony guy still have any for sale?

 

[BLACK'98DSM]

@b00st3d ^

 

[Mech Addict]

Where do those two lines connect at the other ends? Does your engine have a PCV vent in the stock location too? (Pass. Side end of the VC, towards the rear corner).
You might ditch this setup, eliminate those hoses, plug wherever the come from, and use a more common cap. Might be, though that you’d also need a new valve cover if it’s also specially modified for that setup. In my 2-3 years of using this forum I can’t say I’ve seen this setup before, so maybe a mod that was popular once, but now folks achieve whatever benefits that thing yeilds, but in a different way. Perhaps someone can explain….

 

[Christo]

Bought one of those vented oil caps way back when from Hal, never installed it though. Went a different route.

 

[pauleyman]

Hal Landry was the original designer. Tony Davis took over. He is local to me. If I recall the cap installs just like stock and has the same possible problems. Needs occasional maintenance, new gasket, bend the bracket every so often

 

[1990TSIAWDTALON]

I have one of Hal's and one of Tony's. Almost identical. I did give a hand by looking inside the 1st one I got so I could let Tony know what kind of packing was in my original one.
I have not used mine but I have test fit them both. One needed a little tweaking on the tabs is all and the other was fine. Hal's had a substance like a scotchbrite pad inside for packing.

 

[streetraceboi]

Hal Landry. Havent heard that name in awhile

 

[DogWhistle]

My gsx came with this crazy ass oil cap. Never seen on and can’t find them anywhere. As cool as this thing is it isn’t tight and oil leaks past it and onto the valve cover. I’ll be trying to rebuild it to make it functional but has anyone seen an oil cap like this in case I can just buy another one?

We bought one of Tony’s new ones and it works well to evacuate brief crankcase pressure. No doubt that is why your car’s PO installed this. If you remove it, you may discover that the crankcase pressure, under boost, will find new ways to escape.

If it is loose, bend the tabs slightly. If it leaks, use the gasket from an oem oil cap or make your own.

These can get quite warm while the engine is running.

 

[b00st3d]

That is one of Hal's caps. I based mine off of his and they are pretty much the same thing. I did recess the bolt and change the outlets to opposing on the dual port.
As stated above, you can bend the arms up slightly to cause it to clamp harder or add a second gasket to achieve the same basic result.

 

[Smoove_DSM]

That is one of Hal's caps. I based mine off of his and they are pretty much the same thing. I did recess the bolt and change the outlets to opposing on the dual port.
As stated above, you can bend the arms up slightly to cause it to clamp harder or add a second gasket to achieve the same basic result.

Do you still sell these caps?

 

[1990TSIAWDTALON]

SIMPLE Google search.........

4G63 Vented Oil Caps

These cap works on all 1st and 2nd gen DSMs with the 4G63/4 engine.They also work on all Evo8 and Evo9 engines.AND they work on the 3KGT/ Stealth engines as well!

b00st3d.com

 

[TerminalTalon]

Buschur sells a version also.

 

[1990TSIAWDTALON]

I also double stack the gaskets which seems to help too.

 

[Smoove_DSM]

SIMPLE Google search.........

4G63 Vented Oil Caps

These cap works on all 1st and 2nd gen DSMs with the 4G63/4 engine.They also work on all Evo8 and Evo9 engines.AND they work on the 3KGT/ Stealth engines as well!

b00st3d.com

My Man thanks

 

[Smoove_DSM]

Buschur sells a version also

You have a link for those?

 

[Car Cannibal]

2025 update, don't see Tony's or Buschurs available. Any insight on the vented oil cap?

I PM'd Tony but he hasn't been on here in over a month. I replaced the stock location valvecover vent tube with a big 8an fitting bit I'm still getting dipstick popping from pressure at 30psi. Thanks

 

[TerminalTalon]

I’m in the same boat. I figured run the pop in AN bungs and get a cap now I can’t find one .

 

[Car Cannibal]

I started a new thread about venting, there's links and options in there since this vented cap is probably not available unless someone picks up the mantle.

Venting via the rear balance shaft inspection hole in the block is looking like the easiest option. M10 x 1.25 x 20mm

 

[1990TSIAWDTALON]

How big is the actual "vent" back there? It doesn't appear to be much. Is the bolt hollow?

 

[Car Cannibal]

Online said an M10 fitting has an ID of 9mm or .35" but that seems too big. It's definitely not a real 6an or bigger but if it's easy to get to it's better than nothing until one can do the front cover balance shaft hole you sent me. Thanks

Inspection hole fitting and carb spring on the dipstick might be plenty to stop 30psi oil pukes.