Wilhoit Anti Drain Back Valve

[Funracer]

Anyone tried one of these from this company? Nice price reduction.

WR Anti Drain Back Valve for Porsche 911 up to 1989 - Willhoit Auto Restoration

[Larmo63]

Rothsport has sold this type of product for years. I have one on my Targa.

[Funracer]

Originally Posted by Larmo63

Rothsport has sold this type of product for years. I have one on my Targa.

Right. Just looking to see if anyone has any experience with this one. Differences or similarities etc. Nice price point relatively speaking.

[Jeff Alton]

Why do you think you need one? The WR page is an interesting read, mostly accurate....

Cheers

[Funracer]

Originally Posted by Jeff Alton

Why do you think you need one? The WR page is an interesting read, mostly accurate....

Cheers

I just think its a cool idea. If it works. The Rothsport one is cool too but this one is now $70 cheaper so it has my attention. I do get a bit of white smoke at startup as many do.
I have read a lot about the pros and cons and want to try one.

Regards

[Funracer]

Btw I used to have a 2004 JCW Mini that my kids and I autocrossed. Smoking little car.

[Harpo]

Yea the price is way better than Rothsport.

[Marc Bixen]

I love this quote, "All Porsche 911s up to 1989, have a dry sump oiling system." Actually, ALL 911's up until 1998 993's, and after that GT2's, GT3's and Turbos up to aprox 2009 are DRY SUMPS, Anything with a Metzger bottom end.

[Funracer]

Originally Posted by Marc Bixen

I love this quote, "All Porsche 911s up to 1989, have a dry sump oiling system." Actually, ALL 911's up until 1998 993's, and after that GT2's, GT3's and Turbos up to aprox 2009 are DRY SUMPS, Anything with a Metzger bottom end.

Strictly speaking, his statement is true. Your statement is just more true.

[safe]

Originally Posted by Funracer

I just think its a cool idea. If it works. The Rothsport one is cool too but this one is now $70 cheaper so it has my attention. I do get a bit of white smoke at startup as many do.
I have read a lot about the pros and cons and want to try one.

Regards

I think putting a restriction on the suction side of the oil pump is stupid. Adding something that of it fails might destroys you engine, well, your choice.
A puff of white smoke, these engines has done this since 1964, some after a while, some directly from the show room floor. That has never hurt anything else than feelings.

If you really, really think you need it, don't skimp on it, $70 more might be cheap...

[Quickstep192]

Originally Posted by safe

I think putting a restriction on the suction side of the oil pump is stupid. Adding something that of it fails might destroys you engine, well, your choice.
A puff of white smoke, these engines has done this since 1964, some after a while, some directly from the show room floor. That has never hurt anything else than feelings.

If you really, really think you need it, don't skimp on it, $70 more might be cheap...

I'm curious why you think it would cause restriction. I'm considering one and would hope it's designed in such a way that it would prevent back flow without creating a restriction.

[gled49]

Everyone pirated the design from Porsche, who installed them on the Metzger water cooled Turbos. The valve is hydrodynamicly designed, and not a restriction in the supply. The GT3’s use the same valve body from tank to engine, minus the valve. I bought the turbo assembly and replaced the original housing with the Turbos unit in my 996 GT3, it reduced the start up rattle by about 1/2. I installed Rothsport’s valve on my 73, both my race engines, and the 911R’s we restored which had horrible drainback issues with the high oil tanks. Rothsport makes the valve also to fit factory oil filter console.

[gled49]

And in the later “S” hose.

[Funracer]

Originally Posted by safe

If you really, really think you need it, don't skimp on it, $70 more might be cheap...

Thus my original post. Looking for comparisons to the Rothsport. If the design and quality is the same why would you buy the expensive one?

And no I don’t really, really need it. I don’t really, really need the car at all. But one thing I have learned about 911’s. It’s not about what you need, its about what you want.

[Jeff Alton]

Originally Posted by Funracer

I just think its a cool idea. If it works. The Rothsport one is cool too but this one is now $70 cheaper so it has my attention. I do get a bit of white smoke at startup as many do.
I have read a lot about the pros and cons and want to try one.

Regards

If it works? Doing what? The factory system works, unless the pump is worn... Then you are fixing it with a valve. Despite what the WR site says, one should expect around 4L of oil in the case, give or take at rest.

Buy one, put it in. It won't hurt, but I struggle to see the thing it "fixes".

Again, not a bad product, but I question if it just treats a symptom as opposed the cause.

Cheers

[GH85Carrera]

For my 911, it would be a fix for something that is not broken. If my 911 sits for a few weeks, I only sometimes see a puff of smoke. So what. I just need to drive it more!

It is just not an issue for my car.

[Funracer]

Many threads on these type valves. It seems overall the guys that don’t believe they are safe or effective don’t have one, and the guys that have them like them. Rare to see someone put one in and then later remove it.

I’m about halfway through an engine reseal. Once the motor is back in the car I will revisit my puff of smoke situation, although since I am not doing any internal changes to the motor I don’t believe it will be any different than before. If that is the case I will install one from either Rothsport or Wilhoit as it is easy to do with the engine in the car.

[Jeff Alton]

Once you have run the engine and then parked it for a bit. Drain the crankcase. See how much oil is it. Then decide if you think you need this valve.... Pretty simple test.

Cheers

[Marc Bixen]

It’s pretty simple, the longer the car sits between start ups, the more oil drains back to the motor. My 156,000 mile 964 RS America is dry as a bone if I start it every week or two, If it sits longer it leaks as the oil level builds in the case.
As for the negative comments to the Rothsport , or Willhoit, valves, NO ONE, has reported ANY oil starvation issues with this product. As far as we know a ZERO failure rate. Use with confidence!

[gomezoneill]

$245 dollars for a piece of plastic and some clamps? No thanks.