BillyBoySmith Posted June 15, 2017 Report Share Posted June 15, 2017 Hi Techies, - Is it common for the inlet valves to have a spring and seal under the valve head ? and if so what is the reasoning for it ? - It's a D34 flathead I have stripped with intention of completely rebuilding it. Thanks in advance, B.B. Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted June 16, 2017 Report Share Posted June 16, 2017 sounds by your part description that someone may have been installing some valve stem seals on the puppy....picture ?? Quote Link to comment Share on other sites More sharing options...
BillyBoySmith Posted June 30, 2017 Author Report Share Posted June 30, 2017 On 6/16/2017 at 1:07 AM, Plymouthy Adams said: sounds by your part description that someone may have been installing some valve stem seals on the puppy....picture ?? A bit late I know, but here is a pic of the valves with springs (and seals ?) added under the head. Only the Inlet valves had these but some had deteriorated.. 1 Quote Link to comment Share on other sites More sharing options...
martybose Posted July 1, 2017 Report Share Posted July 1, 2017 Those seals were clearly installed by someone who didn't understand how they work. They are supposed to be on the other end of the valveguide, not the valve head end. Marty Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted July 1, 2017 Report Share Posted July 1, 2017 as the valves are removed from the block I am thinking they were slid onto the shaft just to keep parts in order, not reflect actual assembly position as shown... Quote Link to comment Share on other sites More sharing options...
martybose Posted July 1, 2017 Report Share Posted July 1, 2017 From his initial description, my impression was that what we see is what he found ..... Marty Quote Link to comment Share on other sites More sharing options...
casper50 Posted July 1, 2017 Report Share Posted July 1, 2017 My inpression as well Marty. Quote Link to comment Share on other sites More sharing options...
Fernando Mendes Posted July 1, 2017 Report Share Posted July 1, 2017 1 Quote Link to comment Share on other sites More sharing options...
BillyBoySmith Posted July 4, 2017 Author Report Share Posted July 4, 2017 On 7/1/2017 at 2:09 AM, Plymouthy Adams said: as the valves are removed from the block I am thinking they were slid onto the shaft just to keep parts in order, not reflect actual assembly position as shown... Hi, this is exactly how they came out of the block. What you see are not valve springs (valve springs can just be seen at bottom of pic, just out of shot). These springs and seals (?) were installed just below the valve head as you see them. I've never seen anything like it before. One guy I spoke to thinks they might be installed to rotate the valves whilst engine is in operation. Quote Link to comment Share on other sites More sharing options...
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