Product review: Rothsport oil check valve, For the /6 owners |
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Product review: Rothsport oil check valve, For the /6 owners |
Mark Henry |
Aug 2 2020, 01:32 PM
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#1
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Every winter or anytime I didn't drive my 914/6 conversion for more then 2-3 weeks my oil tank would drain down into my sump. Often this would result in oil on the shop floor and the neighbors would call the EPA or fire department when I started my 914 in the spring.
I was on the fence on buying a Rothsport oil check valve then a generous member here offered me one for free (IMG:style_emoticons/default/blink.gif) Story was he bought one, never looked at it and tossed it into his parts bin, only to find out he accidentally bought two. He said I've helped him out a lot over the years and he was just playing it forward. So a big shout out to Mark, member mzapisek, Thank you. (IMG:style_emoticons/default/pray.gif) So this isn't a just got the package in the mail and it "looks" like it works great worthless review. (IMG:style_emoticons/default/dry.gif) I've had this in 914 for almost 4 months and I've been driving at least every 2nd day for the last 3 months. This one is actually the wrong hose size for a 914, but that didn't matter to me as my conversion uses non stock (NPT) adapters. I made new adapters, bought a new late 911 S hose and cut it to fit. But only the check valve nipple size is different, the body and the valve size is still the same. For a stock feed line 914/6 get the smaller nipples, For -AN hose you will have to make adaptors for the check valves metic sized nipples. The valve is a unique cone mounted to a bronze bushed shaft. I can't see any way it could fail, and if it did it would be in the open position. To install you cut 1-1/2" out of the hose and use the supplied ABA clamps torqued to 35 inch pounds. The big tank/engine printing on the valve make proper orientation foolproof. I bought 2 extra clamps from Belmetric for my S hose adapters and BTW these are NOT the common cheap hose clamps. Once installed I filled the tank with 10 liters of oil, checked the level and then the car sat for 3-4 weeks. The oil level never moved. Driving it has made no difference, on startup I have instant oil pressure exactly the same as before. I lie... it made one huge difference, I no longer have to run the engine to check the oil! Of course I quad-triple checked this both ways till I was confident, when running it shows about a 1/4 dipstick fuller than when it's not, but it does this repeatedly. It's so nice to be able to check my oil before starting the teen, especially when I'm in good clothes. So out of 10 I'd give the Rothsport oil check valve a 9.5/10 losing a half point to price. Since I'm a CSOB it would lose a full point, but I'm so happy with the oil check improvement I gave it a half point back. Included with the valve is 2 ABA hose clamps. Yes, I recommend this product. https://www.rothsport.com/Products/Engine/O...heck-Valves.htm Attached image(s) |
gereed75 |
Aug 2 2020, 07:03 PM
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#2
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Senior Member Group: Members Posts: 1,250 Joined: 19-March 13 From: Pittsburgh PA Member No.: 15,674 Region Association: North East States |
Thanks for the review. I’ve been putting off the installation of mine. I had planned to put it in the same place as yours as opposed to the other leg of the 90. Thanks for the confirmation.
Never thought of the ability to check oil without running the car...nice! |
Mark Henry |
Aug 3 2020, 08:23 AM
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#3
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Thanks for the review. I’ve been putting off the installation of mine. I had planned to put it in the same place as yours as opposed to the other leg of the 90. Thanks for the confirmation. Never thought of the ability to check oil without running the car...nice! Drain or no drain you definitely want it closer to the cooler, if you placed it closer to the tank you will run into a huge PITA draining the oil from the tank. To me being able to check the oil without it running is a huge bonus. Mark, Thanks for the review! Although I don't have any issues (yet) with oil seeping through the pump, I was thinking about adding this valve when I re-install my 2.7L (currently working on a rustoration project). I was wondering if you'd be willing to share additional information on the oil drain plug you added for the tank? Thanks in advance! Rob This is a 50/50 issue, some have never had this problem or drive their car weekly year round. Often these guys think there is no problem. Some like me have a mystery leak, not a drop of oil on the ground all season but a good puddle after about a month of storage. Others get hydro locked and have to pull a couple spark plugs (often # 5 and 6) to drain and many have the 3 alarm smoke screen the first start of each spring. As an engine builder I don't see starting an engine with a case right full of oil as a good thing for the seals, etc. BTW before starting this job I dumped my oil, I only had a liter (quart) or so in the tank, the engine sump had at least 7 quarts in it. (IMG:style_emoticons/default/blink.gif) The oil drain is a large stainless steel NPT T- fitting, IIRC it was a 3/4NPT with a 3/8NPT leg. I TIG welded a metric male fitting to one end to and it now has a nipple I made and TIG welded on the other end for the S hose. I then drilled it through so that it had a bigger, smoother bore. The drain plug is a 3/8 NPT pipe plug, in hindsight I should have used a 1/2"NPT and a EZ drain, but if it works why fix it. Maybe I should get together with Ben and offer the drain as a hose kit? (IMG:style_emoticons/default/idea.gif) |
horizontally-opposed |
Aug 3 2020, 10:01 AM
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#4
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Advanced Member Group: Members Posts: 3,432 Joined: 12-May 04 From: San Francisco Member No.: 2,058 Region Association: None |
Maybe I should get together with Ben and offer the drain as a hose kit? (IMG:style_emoticons/default/idea.gif) (IMG:style_emoticons/default/chowtime.gif) I'd want to add the check valve at the same time. Your point about 7 quarts in the case is a very good one. Rothsport piece looks pretty, but it had better for $300. I'd want that reliability, but would actually prefer something that looks more like the rest of the stuff one finds in a Porsche. Wonder if there is something that does the same thing, as reliably, for less? Then again, maybe $300 isn't crazy considering the cost of it going wrong. |
mepstein |
Aug 3 2020, 10:18 AM
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#5
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914-6 GT in waiting Group: Members Posts: 19,308 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Maybe I should get together with Ben and offer the drain as a hose kit? (IMG:style_emoticons/default/idea.gif) (IMG:style_emoticons/default/chowtime.gif) I'd want to add the check valve at the same time. Your point about 7 quarts in the case is a very good one. Rothsport piece looks pretty, but it had better for $300. I'd want that reliability, but would actually prefer something that looks more like the rest of the stuff one finds in a Porsche. Wonder if there is something that does the same thing, as reliably, for less? Then again, maybe $300 isn't crazy considering the cost of it going wrong. Same discussion on Pelican. "why so much". I don't think anyone had a real solution and most people don't want to experiment on their $10-20K +++ engine. |
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