Daverse 175 Posted November 14, 2012 Report Share Posted November 14, 2012 Hi guys, quick question, does anyone know what the maximum valve protrusion of from the head? Just because I've somehow lost my bentley manual and cant find the values! My heads at a workshop now and they need to know so they dont cut too far.. If anyone can help it would be most appreciated! Thanks Link to post Share on other sites
Daverse 175 Posted November 16, 2012 Author Report Share Posted November 16, 2012 bump, anyone got a bentley manual that can tell me? Link to post Share on other sites
Lukey. 381 Posted November 16, 2012 Report Share Posted November 16, 2012 Is it for valve seat refacing? Link to post Share on other sites
Daverse 175 Posted November 16, 2012 Author Report Share Posted November 16, 2012 basically i had the head skimmed so the valves are now sitting proud, so getting the seats reground in to make them sit ok again Link to post Share on other sites
Lukey. 381 Posted November 16, 2012 Report Share Posted November 16, 2012 It doesn't actually tell you that, it just tells you how far the valve can be on the top side, not how much the base can protrude into the chamber. Link to post Share on other sites
Daverse 175 Posted November 16, 2012 Author Report Share Posted November 16, 2012 what do you mean by top side? thanks Link to post Share on other sites
Lukey. 381 Posted November 16, 2012 Report Share Posted November 16, 2012 The top of the stem, how far up it can be in the head, on the cam side Link to post Share on other sites
Lukey. 381 Posted November 16, 2012 Report Share Posted November 16, 2012 I've just looked again to be sure, for valve margin it does say NA, so it doesn't give any info for the protrusion on the base side. Link to post Share on other sites
Daverse 175 Posted November 16, 2012 Author Report Share Posted November 16, 2012 ah right, gotcha, ill have to have a word with the engine shop and tell them i cant get a figure. Thanks for help! Link to post Share on other sites
Lukey. 381 Posted November 16, 2012 Report Share Posted November 16, 2012 I think it's possible that the top is what they mean though cos if you remove too much seat there won't be enough room for the lifters, I can scan the chart for working it out if that's what they mean. Link to post Share on other sites
FishWick 21 Posted November 21, 2012 Report Share Posted November 21, 2012 Christ, how much did they skim off the head?! lolThey do sit a little proud anyway, but if it should stand to reason that if they skimmed say, half a mill off the head, then cutting the valve seats back half a mill should bring it all back inline? Normally just a resurface of the seats is all that's needed, either with lapping and paste, or one of them cutting tools. Link to post Share on other sites
Daverse 175 Posted November 21, 2012 Author Report Share Posted November 21, 2012 they took off ten thou iirc, i'll upload a pic of the worst offenders, definitely not sitting right and a valve lap wont help.. Link to post Share on other sites
Daverse 175 Posted November 21, 2012 Author Report Share Posted November 21, 2012 this is an example, not sure if it will help or not. Link to post Share on other sites
Lukey. 381 Posted November 21, 2012 Report Share Posted November 21, 2012 Pm me your email an ill scan the charts to PDF for working out whatever they would want to do Link to post Share on other sites
Daverse 175 Posted November 21, 2012 Author Report Share Posted November 21, 2012 Will do, thanks Link to post Share on other sites
Lukey. 381 Posted November 21, 2012 Report Share Posted November 21, 2012 file sent Link to post Share on other sites
Lowlifedubber 9 Posted November 21, 2012 Report Share Posted November 21, 2012 Im going to be encountering this problem soon.Would you mind sending me the same file please Lukey?Or i can poke Dave and ask him to forward it if thats ok.garyforrest21@googlemail.comAlso if you take too much off the seats does it affect spring tension?I will be having this head skimmed i have(seeing as i sold the last one to dave lol) and also getting a 3 angled job on the seats for the new valves.Just wondered if i would encounter any problems?Sorry for the hijack Dave but you will benefit from any answers. ha ha Link to post Share on other sites
Lukey. 381 Posted November 21, 2012 Report Share Posted November 21, 2012 I will send you it in exchange for your US splitter.Deal? Link to post Share on other sites
Lowlifedubber 9 Posted November 21, 2012 Report Share Posted November 21, 2012 Which one?lolEmail received.Thanks Luke.Appreciate it Link to post Share on other sites
Lukey. 381 Posted November 21, 2012 Report Share Posted November 21, 2012 Which one ? You have more than one? Link to post Share on other sites
Lowlifedubber 9 Posted November 21, 2012 Report Share Posted November 21, 2012 Yes lol the one on my car which i got imported from America at a silly cost of £110 and another i bought over here that has a few broken tabs should i bugger the one on the car up lol Link to post Share on other sites
Daverse 175 Posted November 21, 2012 Author Report Share Posted November 21, 2012 i suppose if theres less depth in the seats then the springs would be under less tensikn, but we're talking like microscopic amounts, negligable i would have thought. Feel free to hijack Gaz, i like the attention hahaha Link to post Share on other sites
Lukey. 381 Posted November 21, 2012 Report Share Posted November 21, 2012 Yes lol the one on my car which i got imported from America at a silly cost of £110 and another i bought over here that has a few broken tabs should i bugger the one on the car up lolYea that's fine I'll have the one with some tabs missing (just realised bartering after sending the info is a bad bargaining position) Link to post Share on other sites
Lowlifedubber 9 Posted November 21, 2012 Report Share Posted November 21, 2012 Well im using valve springs with shims so thought i may be able make the difference up with them lolLuke.You would be terrible at blackmail lol Link to post Share on other sites
Daverse 175 Posted November 21, 2012 Author Report Share Posted November 21, 2012 why shims? Ha yeah luke your not really in a position to haggle for which splitter! Link to post Share on other sites
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