MARK Posted February 15, 2017 Report Share Posted February 15, 2017 There have been suggestions in the past about using Jaguar EBC 4871 valve springs as a replacement for Triumph on a TR 6. I bought a set some time ago and intend to try them on my 72 (single valve spring) TR6 using a spare head that I have just had work done on. The Jag valve springs seem a little longer than the ones fitted originally to the head. However I have no idea if the springs that came with the head were correct. Does anyone have experience of using the Jag springs for a road car? What should the correct height of a single spring for 72 configuration be? I have been thinking that if there is increased height in the Jag spring then maybe the lower spacer should be omitted as advocated by Moss when using their uprated valve spring set. Any thoughts please gentlemen? PS. PLEASE -Anyone got a spare single valve spring lower spacer as one of mine went missing between my garage and the machine shop!! ( And are going to Stoneleigh? !!!) MARK Quote Link to post Share on other sites
Mark69 Posted February 15, 2017 Report Share Posted February 15, 2017 (edited) Hi Mark, Is this what you are after. Mark Edited April 14, 2020 by Mark69 Quote Link to post Share on other sites
astontr6 Posted February 16, 2017 Report Share Posted February 16, 2017 Mark, I rebuilt my whole engine unit last year. It was made very plain to me by 2 engine tuners and 1 engine machine shop tuner that: Do not use any heavier valve springs than a TR5,because of the weakness in cam followers and cam lobes on the Triumph 6 cyl. engines. This is a very well covered subject on this Forum, regarding failures! Bruce. Quote Link to post Share on other sites
oldtuckunder Posted February 16, 2017 Report Share Posted February 16, 2017 +1 TR5 spring set and nothing heavier for most applications. CW does them http://www.chriswitor.com/proddetail.php?prod=CW2906 CW also details the free and bound lengths of the single spring 157229 http://www.chriswitor.com/proddetail.php?prod=157229K Alan Quote Link to post Share on other sites
MARK Posted February 17, 2017 Author Report Share Posted February 17, 2017 I cant seem to find the articles advocating use of the Jag springs but I seem to remember that the springs were supposed to be of better quality than Triumph without a leap in poundage rate. Quote Link to post Share on other sites
MARK Posted February 17, 2017 Author Report Share Posted February 17, 2017 Hi Mark, Is this what you are after. Markimage.jpg Yes Mark! I have private messaged you. Quote Link to post Share on other sites
MARK Posted February 18, 2017 Author Report Share Posted February 18, 2017 I believe the info re the use of the Jag AJ6 valve springs came from Forums in USA but I remember speaking to a guy who had a stall at the I.W. at Malvern a few years ago who does tuning work on Jag and Triumph cylinder heads who was advocating their use on a TR6. Quote Link to post Share on other sites
DaveN Posted February 18, 2017 Report Share Posted February 18, 2017 EBC4871 valve springs tr6 and xj40 Quote Link to post Share on other sites
MARK Posted February 24, 2017 Author Report Share Posted February 24, 2017 Daven there seems to be something missing from your post ? These Jag springs were not cheap and if they are not suitable for the TR6 I have wasted cash!! Who is the best supplier for standard springs? Quote Link to post Share on other sites
Mark69 Posted February 24, 2017 Report Share Posted February 24, 2017 Hi Mark do you still need the spacers I have tried to contact you with no response. Mark Quote Link to post Share on other sites
DaveN Posted February 24, 2017 Report Share Posted February 24, 2017 @Mark If you google that part no. They come up on various sites including club triumph. They are most probably unobtainable now but some of the specialist jag dealers may have them. I had them on a list I made up some time ago as a possible alternative because of the poor quality of some of the bits we get from the usual suspects. Quote Link to post Share on other sites
Alec Pringle Posted February 25, 2017 Report Share Posted February 25, 2017 EBC 4871 worked well on Jaguars . . . . . personally I wouldn't put them near a TR6 head, especially considering where the theory of using them appears to have originally sprung from. Caveat emptor . . . . . Cheers Alec Quote Link to post Share on other sites
oldtuckunder Posted February 25, 2017 Report Share Posted February 25, 2017 personally I wouldn't put them near a TR6 head, especially considering where the theory of using them appears to have originally sprung from. If only it was possible to sort the wheat from the chaff! Alan Quote Link to post Share on other sites
MARK Posted February 26, 2017 Author Report Share Posted February 26, 2017 Daven why did you have the Jag springs on your List? Quote Link to post Share on other sites
DaveN Posted February 26, 2017 Report Share Posted February 26, 2017 @Mark An old chap I knew worked for Lex Mead in Maidenhead when it was a leyland dealer, told me they were a suitable alternate as they were stronger. However with today's camshafts and followers maybe it's not such a good idea! Googling the part shows up on other sites ....Club Triumph for example. He also told me about the number of times they used to check the cranks for T/W wear and quite routinely replace them on customers cars..... hence my interest in them also. Another little gem he swore by Vandervell bearings, so I had great fun in tracking down some sets! Good to support a local company.....long since gone. They had a factory IIRC on the slough trading estate. Quote Link to post Share on other sites
MARK Posted March 10, 2017 Author Report Share Posted March 10, 2017 Thanks for that Daven. I think I will have to investigate further before using the Jag springs !! Much thanks to Mark 69 for sending me lower valve spring spacers which I had lost!!. This Forum is a great! Quote Link to post Share on other sites
GT6M Posted March 11, 2017 Report Share Posted March 11, 2017 EBC 4871 worked well on Jaguars . . . . . personally I wouldn't put them near a TR6 head, especially considering where the theory of using them appears to have originally sprung from. Caveat emptor . . . . . Cheers Alec And just whats wrong wid where they come from, lots of folk ev used em , and as far as im aware, no have reported owt amiss with them, Spill the beans, whats up if the bloke woe said to use them if he was trying to help folk stop ruining their cams, thru ..others valve springs being too stiff.!! M Quote Link to post Share on other sites
Stanpartmanpartwolf Posted March 11, 2017 Report Share Posted March 11, 2017 Read between the lines.....GT but no 6.... By the way, last week I finally got Moss to admit, after some fifteen years of denials, that they HAD altered the spec of the almost universally used TT1207 valve springs. Yes, made them stiffer (& more prone to coil binding). I am fairly sure these have been responsible for spates of cam & follower failures. Stiffness increases with the fourth power of the material diameter & it doen't take a genius to figure that a mere 10% increase leads to a 46% stiffer spring. The same applies to anti-roll bars, but that's a whole other story. Quote Link to post Share on other sites
astontr6 Posted March 12, 2017 Report Share Posted March 12, 2017 Standpartmanpartwolf, I unfortunately see this another case of our main spares suppliers not having proper know how and quality systems in place. I complained to the Register about this sort of thing 20+ years ago and still have the correspondence. Needless to say nothing was done! I re-built my whole power unit last October and was warned by 3 engine re- builders/tuners do not use any valve springs heavier than TR5 and only use nitrided cam followers from Newman. This seems to back up your case?? But I also had the saga of being supplied with a soft lay shaft which roger Williams warned about in his book of 2002 and it was still going on in 2016???? I hope you have referred this matter to the TR Register QA Team? Bruce. Quote Link to post Share on other sites
MARK Posted March 18, 2017 Author Report Share Posted March 18, 2017 And just whats wrong wid where they come from, lots of folk ev used em , and as far as im aware, no have reported owt amiss with them, Spill the beans, whats up if the bloke woe said to use them if he was trying to help folk stop ruining their cams, thru ..others valve springs being too stiff.!! M Hi Mate Do you know how the jag spring specs compare with tr 6 valve springs? What springs did you use on your 2,5 GT6? Quote Link to post Share on other sites
GT6M Posted March 18, 2017 Report Share Posted March 18, 2017 (edited) I did,nt bung em in, as thowt they too stiff I bunged in Ford CVH springs and seals,top hats thees are slightly softer than the Jags, and are wider too the jag,ns compressed the OE type moer when bunged into vice an tightened up back to back the CVH ones wer aboot the same as OE Butt need the full caboodle,, springs, seat base,, thee,s include a top hat oil seal, and top retainer, yer OE collets fit thou !! and also, the outer edges of the top spring retainer needs chmferred like OE, as the ford,ns are 90deg, so catch ont under side oft rocker arm see pic, fun this oot after wards !! If ye no got a lathe, and time t,fart aboot, then just go OE. http://www.ebay.co.uk/itm/Ford-CVH-Engine-Valve-Springs-/272588868321?hash=item3f77900ae1:g:7m4AAOxyHt9R01rJ http://www.ebay.co.uk/itm/FORD-CVH-FIESTA-ESCORT-ORION-RS-TURBO-1-1-1-3-1-4-1-6-1-8-VALVE-STEM-OIL-SEALS-/140427514069?hash=item20b221d0d5:m:m9_BU5avtiPD2vX1PDxqExw http://www.ebay.co.uk/itm/Genuine-Ford-Escort-95-01-Tappet-Valve-spring-retainer-1033901-/112328140290?hash=item1a27476602:g:z9YAAOSw9IpX0ecQ and got some inner springs frae the local ford dealer, as a freebe, as they wer skoping em oot see pic of em, note, outer springs no on, as just setting rocker contact on thee,s pics wid soft inner spring, no got a full pic of both on M Edited March 18, 2017 by GT6M Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.