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) |
fixer34 |
Aug 13 2020, 05:26 PM
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#2
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Senior Member Group: Members Posts: 1,085 Joined: 16-September 14 From: Chicago area Member No.: 17,908 Region Association: Upper MidWest |
Well, on the recommendation plus the fact I don't like cleaning up a couple quarts of oil from the roaster pan under the car.. I bought one, arrived today.
It will be the weekend project, but taking me a little to wrap my head around the location. Making sure I understand, this goes on the tank suction line, not the return. And unlike a conventional check valve, there is little/no pressure on the supply side, it requires the suction force of the pump to open the valve and let oil flow. Since it states to drain the oil from the tank and line, I'm assuming the engine should be cranked for a bit without starting to get oil back into the line from the valve to the pump. For someone who asked if a 'standard' check valve would work, I would say a big NO. |
Mark Henry |
Aug 20 2020, 06:52 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 |
Well, on the recommendation plus the fact I don't like cleaning up a couple quarts of oil from the roaster pan under the car.. I bought one, arrived today. It will be the weekend project, but taking me a little to wrap my head around the location. Making sure I understand, this goes on the tank suction line, not the return. And unlike a conventional check valve, there is little/no pressure on the supply side, it requires the suction force of the pump to open the valve and let oil flow. Since it states to drain the oil from the tank and line, I'm assuming the engine should be cranked for a bit without starting to get oil back into the line from the valve to the pump. For someone who asked if a 'standard' check valve would work, I would say a big NO. It mounts between the tank bottom and cooler. It's clearly marked TANK/ENGINE. I didn't didn't do any special pre-oiling, fill the tank till you see oil on the dipstick (do NOT fill to the top oil mark) after that I just started it up. When starting watch your idiot light and pressure gauge, my engine had pressure instantly. Check for oil leaks. Note don't mount the valve high up under the fender, because it will be a total PITA to drain your oil. Mount it just before the cooler inlet. Once the engine is hot check your oil with the engine running. I never run more than half full on the dipstick so I'd top it up to that point, when you shut it down after a few minutes check your oil level that's where you fill cold. Do this several times times both ways till you're confident that the cold reading is also correct. I've been driving my 914 a lot this summer, I live in the country so every round trip to town is 40 minutes to a hour, I've even drove to Toronto several times, average 2.5+ hour round trips. My teen is behaving perfectly. Mark, BTW, EZOil drain has a 3/8 NPT fitting. Its a natural it from another air-cooled engine I've thought about it, almost pulled the trigger, but the 3/8" NPT pipe plug works good, is easy to remove and doesn't leak. If I didn't have a 2 post lift I might be more inclined to get an EZ drain. |
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