Tiger Tamer Posted January 27, 2023 Share Posted January 27, 2023 I thought I would give the Tiger an oil change since the oil is getting dirty and I always change the filter as well. It doesn't get used that often so it's been a couple of years since the last change. I drained the oil and removed the old filter and no oil came out, it was bone dry and as clean as new, so it has never had oil passing through it. For some reason the filter is being bypassed. It has good oil pressure, so I don't think it has caused any damage. I am getting a sickening feeling that there maybe something wrong with the pump as I suppose there is some sort of bypass in it. Any thoughts welcome. 1 1 Quote Link to comment Share on other sites More sharing options...
tortron Posted January 27, 2023 Share Posted January 27, 2023 There's usually a bypass (in my experience) at the housing that will start bypassing the filter if the pressure is too high. The idea being if the filter is clogged or collapsed the oil just goes around it Just a spring and a ball behind a bolt head most of the time. Might have a weal/broken spring Quote Link to comment Share on other sites More sharing options...
cletus Posted January 28, 2023 Share Posted January 28, 2023 Is the filter remote mounted? Have heard of those being hooked up the wrong way round and causing issues Quote Link to comment Share on other sites More sharing options...
Tiger Tamer Posted January 28, 2023 Author Share Posted January 28, 2023 1 hour ago, tortron said: There's usually a bypass (in my experience) at the housing that will start bypassing the filter if the pressure is too high. The idea being if the filter is clogged or collapsed the oil just goes around it Just a spring and a ball behind a bolt head most of the time. Might have a weal/broken spring It looks like the pressure relief valve is part of the pump so I will have to drop the sump and remove the pump. The vave is held in by a welch plug which makes it trickyer to replace. Quote Link to comment Share on other sites More sharing options...
Tiger Tamer Posted January 28, 2023 Author Share Posted January 28, 2023 2 minutes ago, cletus said: Is the filter remote mounted? Have heard of those being hooked up the wrong way round and causing issues No, it's on a Ford motorsport 90deg adaptor because of clearance problems. Always had oil in the filter in past oil changes. 1 Quote Link to comment Share on other sites More sharing options...
Tiger Tamer Posted January 28, 2023 Author Share Posted January 28, 2023 I dropped the sump and pulled the pump and the pressure relief valve seems to be fine. It's all very clean and the spring is fine so I think it's OK. Luckily it is a easy job to remove the sump as there is nothing in the way. I used a high torque starter which is smaller so I didn't have to remove it either. Which is all good because most things are a battle to work on with limited space. Maybe it was just a bum filter. I am sure Beer will help. 3 Quote Link to comment Share on other sites More sharing options...
tortron Posted January 28, 2023 Share Posted January 28, 2023 Maybe a fake k&n? 1 Quote Link to comment Share on other sites More sharing options...
cletus Posted January 28, 2023 Share Posted January 28, 2023 https://www.boefab.com/blogs/tech/72880067-k-n-hp-2009-filter-comparison Interesting,i wonder if the fact they are a restriction means the pump couldnt overcome the valve/left a big bubble of air for the duration that filter has been fitted? Is this engine in a sunbeam alpine/tiger? 2 Quote Link to comment Share on other sites More sharing options...
Tiger Tamer Posted January 28, 2023 Author Share Posted January 28, 2023 15 minutes ago, tortron said: Maybe a fake k&n? You think by buying a good brand you would be safe but they are probably just relabel of someone else's they work with. Quote Link to comment Share on other sites More sharing options...
Popular Post Tiger Tamer Posted January 28, 2023 Author Popular Post Share Posted January 28, 2023 3 minutes ago, cletus said: https://www.boefab.com/blogs/tech/72880067-k-n-hp-2009-filter-comparison Interesting,i wonder if the fact they are a restriction means the pump couldnt overcome the valve/left a big bubble of air for the duration that filter has been fitted? Is this engine in a sunbeam alpine/tiger? Thats what I am thinking. Perhaps I could send it back to the manufacturer or supplier and see if i can get an answer. Yes the car is a Sunbeam Tiger. Originally it had a 260 but the original engine had been replaced with a earlier 260 out of a Fairlane and had low oil pressure. Being all SBF made it reasonably easy to fit the 5.0L. Gearbox is the original close ratio top loader. Diff original as well. 13 2 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted January 28, 2023 Share Posted January 28, 2023 Beaut car. It's probably too clean to try this but have you wound it over to see oil coming out of filter hole? And I'm assuming oil pickup is not too high or anything? Sorry just read you have good pressure. I'm stumped. Be interesting to have filter checked, but no oil in it is strange... 1 Quote Link to comment Share on other sites More sharing options...
Tiger Tamer Posted January 28, 2023 Author Share Posted January 28, 2023 Thanks for the link Cletus, now I see the problem. Quote Link to comment Share on other sites More sharing options...
Nominal Posted January 28, 2023 Share Posted January 28, 2023 TBH I wouldn't use a K&N oil filter on anything. /lingpost 3 Quote Link to comment Share on other sites More sharing options...
Popular Post Tiger Tamer Posted January 29, 2023 Author Popular Post Share Posted January 29, 2023 I took the K&N back to Repco where I had bought it from over 2 years ago and they are going to contact K&N to see what they have to say or offer. They did have a NAPA gold filter the same dia etc which is what I need as a full size filter won't fit. They didn't charge me for the new filter even after all that time so thumbs up to Repco. I fitted the pump and picked up the sump only to see the pump drive rod still sitting in the sump , so removed the pump and refitted it with the shaft and fitted the sump. Filled it up with oil and took note of the level on the dipstick, fired it up and rechecked the level. It had dropped so I figured it had gone into the filter. Topped it up and took it for a short drive. Filter is nice and hot so it must be full of oil. 13 Quote Link to comment Share on other sites More sharing options...
Tiger Tamer Posted January 29, 2023 Author Share Posted January 29, 2023 Here is a link to the Tigers rebuild. It wasn't small and easy by any means but once started had to be finished. I didn't do the panel work or paint but did the mechanicals. Cheers In for a penny - sunbeamtiger.co.uk 1 2 Quote Link to comment Share on other sites More sharing options...
VitesseEFI Posted January 29, 2023 Share Posted January 29, 2023 On 28/01/2023 at 04:33, Nominal said: TBH I wouldn't use a K&N oil filter on anything. /lingpost Likewise. Don’t need to be fake to be crap. I’m struggling with the idea that you can run the engine for two years with good oil pressure and the filter remains dry. I guess this engine must have an external bypass? All the engines I’ve ever worked on have relied on relief valves within the filter canister to bypass the element if it clogs. This means no oil in the filter =no bearings left. As the pop pressures on the internal relief valves are at least 1 Bar I assume your external valve must be at least that, so pretty amazing no oil has even reached the filter…. Most unexpected! 2 Quote Link to comment Share on other sites More sharing options...
Tiger Tamer Posted January 30, 2023 Author Share Posted January 30, 2023 18 hours ago, VitesseEFI said: Likewise. Don’t need to be fake to be crap. I’m struggling with the idea that you can run the engine for two years with good oil pressure and the filter remains dry. I guess this engine must have an external bypass? All the engines I’ve ever worked on have relied on relief valves within the filter canister to bypass the element if it clogs. This means no oil in the filter =no bearings left. As the pop pressures on the internal relief valves are at least 1 Bar I assume your external valve must be at least that, so pretty amazing no oil has even reached the filter…. Most unexpected! The pressure relief valve in the sbf engines is in the oil pump itself and if the filter clogs' then it activates and lets the oil bypass the filter, which keeps oil to the bearings. Since the anti drain back valve in the filter wouldn't open it activated the valve which saved the engine. I'm glad the pressure relief valve worked for over 2 years. Survived a bullet I suppose, so sort of lol. Quote Link to comment Share on other sites More sharing options...
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