Guest ntc Posted August 17, 2011 Report Share Posted August 17, 2011 Best check your valve springs as well Stuart. You have a set of used one's for sale then never been over 5000 rpm Quote Link to post Share on other sites
Alec Pringle Posted August 17, 2011 Report Share Posted August 17, 2011 (edited) Should be double springs on the inlet valves, double springs plus the auxiliary third spring (ie triple springs) on the exhaust valves . . . . that's up to CT 21470 or thereabouts, can't remember the changeover number for sure, after which it was double springs all round for the remainder of TR4 and 4A production. Inadvertent fitment of the auxiliary spring to the inlet valves will cause problems, and cause noise ! Afterthought - this is one of those classic examples of where it's handy to have the parts book as well as the workshop manual. All too easy to misinterpret the manual, the parts book provides the necessary clarification. I'd never get anything right without the two to compare and cross reference ! Cheers, Alec Edited August 17, 2011 by Alec Pringle Quote Link to post Share on other sites
randall977 Posted August 17, 2011 Author Report Share Posted August 17, 2011 I noticed someone else posted on here about 3 springs per valve so it's not just me. This is original, what's the problem with it - they have lasted 50 years without a problem... I never rev anywhere near 5000rpm... Quote Link to post Share on other sites
Guest ntc Posted August 17, 2011 Report Share Posted August 17, 2011 I I never rev anywhere near 5000rpm... Thats when you change gear chap It;s a sport's car for ch!!!! sake Quote Link to post Share on other sites
randall977 Posted August 17, 2011 Author Report Share Posted August 17, 2011 Thanks for the clarification. So should I remove the third spring on the inlet, why does it cause a problem? I do NOT want to remove the head, can I put lots of rope in the cylinder in order to remove the extra spring? Quote Link to post Share on other sites
Guest ntc Posted August 17, 2011 Report Share Posted August 17, 2011 Thanks for the clarification. So should I remove the third spring on the inlet, why does it cause a problem? I do NOT want to remove the head, can I put lots of rope in the cylinder in order to remove the extra spring? I would speak to the guys that built the head?????? and yes you can,make sure you have the spring central collet fitted The pic will self distruct in one hour Quote Link to post Share on other sites
randall977 Posted August 17, 2011 Author Report Share Posted August 17, 2011 (edited) That would be fine if I knew who rebuilt the head...it was done by the previous owner... So what is the problem with three valves on the inlet? Edited August 17, 2011 by randall977 Quote Link to post Share on other sites
BrianC Posted August 17, 2011 Report Share Posted August 17, 2011 Changeover is as per Alec's post. Moss catalogue states: "Aux spring only required when 3/8" stem exhaust valves are used. Lower spacer not to be used with this spring." And for the later cars (double springs on inlet and exhaust): "Valve spring sets to standard specification are not available and, we consider they were a bit under-designed anyway, so we offer complete sets of uprated springs)." Quote Link to post Share on other sites
Guest ntc Posted August 17, 2011 Report Share Posted August 17, 2011 (edited) Changeover is as per Alec's post. Moss catalogue states: "Aux spring only required when 3/8" stem exhaust valves are used. Lower spacer not to be used with this spring." And for the later cars (double springs on inlet and exhaust): "Valve spring sets to standard specification are not available and, we consider they were a bit under-designed anyway, so we offer complete sets of uprated springs)." Brian It is not a spacer Moss should know better than that????????? however it keeps things inline Edited August 17, 2011 by ntc Quote Link to post Share on other sites
randall977 Posted August 17, 2011 Author Report Share Posted August 17, 2011 Well rocker shaft is VERY worn, new parts go on tomorrow - glad I stripped it down. Just have to remove extra springs as well... Quote Link to post Share on other sites
stuart Posted August 18, 2011 Report Share Posted August 18, 2011 Best treat it to a new set of springs as well as spring seats. Stuart Quote Link to post Share on other sites
ChrisR-4A Posted August 19, 2011 Report Share Posted August 19, 2011 Hi try checking the connections on the rear of the ammeter, these are often rusted and pass very little current. Quote Link to post Share on other sites
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