AlanG Posted November 12, 2014 Report Share Posted November 12, 2014 Has anyone fitted these seals? Just wondered if they would be of any benefit on the head I'm currently rebuilding. Rimmers do them but for use when the rocker oil feed kit is fitted, which I am not. Would there be any reason for not fitting them to a standard head? Alan. Quote Link to post Share on other sites
peejay4A Posted November 12, 2014 Report Share Posted November 12, 2014 Don't fit them or you risk allowing the valve stems to run dry. Quote Link to post Share on other sites
TriumphV8 Posted November 13, 2014 Report Share Posted November 13, 2014 (edited) If you are talking about these little rubber rings i think they do not do any harm. Normally I cut the valve guides down in a lathe and fit real valve stem seals and did not notice that they run dry. I employ the green/steel VW Golf valve caps in 8mm Edited November 13, 2014 by TriumphV8 Quote Link to post Share on other sites
peejay4A Posted November 13, 2014 Report Share Posted November 13, 2014 (edited) Why were they not fitted from new? Does the TR engine have a problem with oil making its way through the valve guides? Only on worn engines I would say. Edited November 13, 2014 by peejay4A Quote Link to post Share on other sites
Lebro Posted November 13, 2014 Report Share Posted November 13, 2014 Should not need them on a standard engine - unless your guides are badly worn. Bob. Quote Link to post Share on other sites
TriumphV8 Posted November 13, 2014 Report Share Posted November 13, 2014 (edited) Always same question: Must I have to do that? Answer is "No", especially, as already posted, done on new guides. Also not necessary to use Bronze instead of cast iron for the guides. That was the calculation at chronical bankrupt Triumph company. The fun costs money and there is no instant improve to be noticed. Improvement is mostly done in small steps which individually seen do not make that difference. But if you put it all together there is a difference nice to have. I can tell that I do not refill oil between oil changes and plugs look like recently fitted to the engine. Modern engines have more oil in that area and they do not like oil in the Kat and AFR sensor. Our engine improves for power because the oil before dripping out of the inlet valve guide does not drop on the valve and burn and so a less thick crown of coal is noticed. There is no sense to cut the valve and polish by 10th of a millimetre when after 1000Km there is a layer of coal in that area 10 times thicker! I think the main difference is if one can do that by its own and its a hobby for him and one has fun to improve and from that only has to pay for the material/parts or a motor specialist does that job for him what makes the whole thing more expensive. Or just found this older one with the VW caps: Edited November 13, 2014 by TriumphV8 Quote Link to post Share on other sites
peejay4A Posted November 13, 2014 Report Share Posted November 13, 2014 Fair enough but in the case of a standard head does the benefit of a hard to quantify reduction in oil consumption outweigh the risk of valve guide wear? Quote Link to post Share on other sites
Guest ntc Posted November 13, 2014 Report Share Posted November 13, 2014 (edited) Pete Yes it does, the inlet valves are only done and the incoming petrol vapour keeps the guides good with the low mileage most cars do. Edit And the above seals are no good. Edited November 13, 2014 by ntc Quote Link to post Share on other sites
TriumphV8 Posted November 13, 2014 Report Share Posted November 13, 2014 Why are they no good? Quote Link to post Share on other sites
Guest ntc Posted November 13, 2014 Report Share Posted November 13, 2014 The seal needs to be retained by the spring,again inlets only Quote Link to post Share on other sites
RogerH Posted November 13, 2014 Report Share Posted November 13, 2014 Is there a particular type/part number/supplier that is better than others. Roger Quote Link to post Share on other sites
TriumphV8 Posted November 13, 2014 Report Share Posted November 13, 2014 It is the way VW, Volvo, Mitsubishi, Renault, Suzuki et all fit these stem seals for 40 years. Should a seal get loose nothing bad happens. Quote Link to post Share on other sites
TriumphV8 Posted November 13, 2014 Report Share Posted November 13, 2014 Hi Roger, I believe any supplier is better than doing nothing. Here is a FEBI, a German good quality supplier: http://www.ebay.co.uk/itm/FEBI-03345-VW-Golf-1-9-Turbo-MK-3-94-99-Diesel-EST-VALVE-STEM-SEAL-/190978065585?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2c772e04b1 ELRING is a good German manufacturer. I took a 8mm seal although the valves are imperial because I could get them easily in Germany.. Quote Link to post Share on other sites
Guest ntc Posted November 13, 2014 Report Share Posted November 13, 2014 Roger The one on the right,a search will tell all. Quote Link to post Share on other sites
AlanG Posted November 13, 2014 Author Report Share Posted November 13, 2014 Thanks for the replies. Looks like a split decision. Guess I'll go without as it's managed without for best part of 50 years. Alan. Quote Link to post Share on other sites
Z320 Posted September 23, 2021 Report Share Posted September 23, 2021 Hi, to fit valve stem seals was my idea, but after finding (via Google only) and reading this older thread there seems to be no need? I'm on 0.4 liter / 1.000 km with not sealed push rod tubes (now hopefully sealed). Anyone out there who fitted them on his 4 cylinder engine? Ciao, Marco Quote Link to post Share on other sites
Andy Moltu Posted September 23, 2021 Report Share Posted September 23, 2021 I have them fitted to my 4 cylinder engine. Decided to strip my engine down in the spring and got it back on the road at teh weekend. Had the head worked on by Ric Wood of CNS Heads in Stockport. The guides he fitted what I beleive are Colisbro guides with seals on both the inlets and exhausts. 10 Miles on running in oil so far so benefit to be established. On the 6 I have got a set of Chris Wittor's bronze guides with seals on the inlets. When the seals got old the oil consumption went up and dropped after replacing. The seals are A series and fit into a groove machined in the top of the guide that retains them. Quote Link to post Share on other sites
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