Victor1155 Posted October 18, 2008 Report Share Posted October 18, 2008 Hi Everyone Has anyone come across a supplier of the modern type of valve stem oil seals that will fit the valves and guides on a CP cylinder head as I would rather use this type of seal than the 'doughnut' type of seals that are available from most suppliers. I am in the process of a head rebuild, lead free and all that, but want to use the valve stem seals that push on to the valve guide as personal experience shows that the 'doughnut' type of seal don't do a really good job of controlling the flow of oil between the valve stems and the guides and I want the job to be done right from the start and last a good long while. As usual I will be grateful for any advice regarding availability, stockists and experiences with this type of stem seal. Steven H Quote Link to post Share on other sites
john.r.davies Posted October 18, 2008 Report Share Posted October 18, 2008 I believe Chris Witor can oblige. John Quote Link to post Share on other sites
smizgals Posted October 18, 2008 Report Share Posted October 18, 2008 Hi Everyone Has anyone come across a supplier of the modern type of valve stem oil seals that will fit the valves and guides on a CP cylinder head as I would rather use this type of seal than the 'doughnut' type of seals that are available from most suppliers. I am in the process of a head rebuild, lead free and all that, but want to use the valve stem seals that push on to the valve guide as personal experience shows that the 'doughnut' type of seal don't do a really good job of controlling the flow of oil between the valve stems and the guides and I want the job to be done right from the start and last a good long while. As usual I will be grateful for any advice regarding availability, stockists and experiences with this type of stem seal. Steven H Steven, Try Kingston Motorsport who fitted some on the inlet valves on an exchange cylinder head supplied to me. Stan Quote Link to post Share on other sites
TR6 Poor Posted October 20, 2008 Report Share Posted October 20, 2008 Any machine shop could set you up with them. I have them on mine, but, sorta wish I hadn't. I have been told that some seal so well, there is not enough lubrication to the valve guides, and this causes increased guide wear. I have no way of knowing if this is true. The last TR6 I had, 116,000 miles, used very little oil. In fact, the peson I sold it to, he restored the rest of the car and left the internal engine alone, and kept it about 8 yrs., and put I don't know how many miles on it. He sold it for 12K, I sold it to him for 4.5k. I sold it because it was yellow, and I just could not stand it any longer, to each his own. So, one would wonder if we need modern seals. Quote Link to post Share on other sites
Victor1155 Posted October 20, 2008 Author Report Share Posted October 20, 2008 My grateful thanks to all who have answered and I will be giving Chris Witor a call, I looked on his website last night and, as said, he does carry the stem seals that I need. However I did a general search for Kingston Motorsport but could not find any information ie location, contact number etc. The main reason I need to control the oil consumption is that as I get closer to fitting an EFI system I need to prevent as much oil getting onto the EGO sensor, when its fitted, as I possibly can and I do understand the consequences of not enough oil to lubricate the guides and the valve stems. It will be something that I will have to watch over a period of time. So again thanks to all replies. Brgs Steven H Quote Link to post Share on other sites
BrianC Posted October 20, 2008 Report Share Posted October 20, 2008 I did a general search for Kingston Motorsport but could not find any information ie location, contact number etc. Try this: Kingston Sports Cars Triumph Sports Car Specialist for Tuned engines & Upgraded Transmission,Overdrive conversions tel:01359 269777 email: tony@kingstonsportscars.co.uk website: www.kingstonsportscars.com Quote Link to post Share on other sites
Victor1155 Posted October 20, 2008 Author Report Share Posted October 20, 2008 Hi Brian Brilliant!! Will give them a try as well. Many thanks Steven H Quote Link to post Share on other sites
john.r.davies Posted October 20, 2008 Report Share Posted October 20, 2008 Victor, If you are doing up the cylinder head, consdier bronze valve guides. I'm no metallurgist, but I understand the advantage is that steel/bronze does not gall and seize in a low oilong situation, when cast iron/steel will. John Quote Link to post Share on other sites
88V8 Posted October 23, 2008 Report Share Posted October 23, 2008 The TR6 had no seals at all, and with a standard engine and no rocker feed, I'm not aware that they are necessary. If you go for bronze guides - and there are some knowledgeable people on here who are unkeen on them for a road car - I believe the valve/stem clearance needs to be different from the standard iron guide, but whether less or more I can't recall. Ivor Quote Link to post Share on other sites
Don Bruce Posted October 30, 2008 Report Share Posted October 30, 2008 The TR6 had no seals at all, and with a standard engine and no rocker feed, I'm not aware that they are necessary. If you go for bronze guides - and there are some knowledgeable people on here who are unkeen on them for a road car - I believe the valve/stem clearance needs to be different from the standard iron guide, but whether less or more I can't recall. Ivor Hi Guys, Is there a general concensus out there that valve stem oil seals are not required? This is virtually what I was told by another contact in the trade. I am burning quite a bit of oil; I have no rocker feed and was considering rebuilding the head. Don Quote Link to post Share on other sites
foster461 Posted October 31, 2008 Report Share Posted October 31, 2008 Hi Guys,Is there a general concensus out there that valve stem oil seals are not required? This is virtually what I was told by another contact in the trade. I am burning quite a bit of oil; I have no rocker feed and was considering rebuilding the head. Don For a street car the steel guides are fine and dont need seals. When they are worn out they need replacing. High performance engines are often built with the bronze guides and they need additional clearance so the seals are needed to prevent oil getting down the guides. On the dual spring heads that is a challenge because there are not too many seal/guide combinations that will work in the confined space. Richard Good sells specially machined bronze guides that have been machined to take a teflon seal and that is what I have on my engine. Stan Quote Link to post Share on other sites
Don Bruce Posted October 31, 2008 Report Share Posted October 31, 2008 Thank you Stan for that clear explanation. Don Quote Link to post Share on other sites
Tom Fremont Posted October 31, 2008 Report Share Posted October 31, 2008 Hi Guys,Is there a general concensus out there that valve stem oil seals are not required? This is virtually what I was told by another contact in the trade. I am burning quite a bit of oil; I have no rocker feed and was considering rebuilding the head. Don On a motor with bronze guides ( Racetorations head ) and no seals it gets 1500 miles/ quart with rocker oil feed and 2000 miles/ quart without. Now with 75,000 miles on the block, 40,000 on the head. So I would say " not necessary ". Furthermore, I have misgivings about lubrication with seals present Quote Link to post Share on other sites
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