science 0 Posted February 19, 2013 (edited) It seems some Cosworth YB engine owners have used VW's (034109309AD) tappets as a cheaper alternative. But they are inferior to the Cosworth engine labyrinth design tappet. http://www.ina.de/content.ina.de/en/branches/automotive/engine_systems/product_range/mot3200/mot3210/mot3211/mot3211.jsp Cosworth INA part no. 420004810 TSTHL type (hydraulic bucket tappet labyrinth design) 64,5 gramm? Volkswagen INA part no. 420002210 TSTH type (hydraulic bucket tappet) 81 gramm? INA Hydraulic tappet catalogue; http://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/automotiveaftermarket/catalogue/downloads_2/INA_valve_train_components_pc.pdf I'm not suggesting using these as the specification may be different, with potentially disastrous results. But the INA Cosworth tappets are now cheaper and easily available. Edited February 19, 2013 by science Quote Share this post Link to post Share on other sites
science 0 Posted February 21, 2013 After trawling the American and German VR6 forums, it seems many people have had success with the lighter weight lifters from the 16v and g60 engine; VW 050109309H INA 420004310 Weight 50g/54g As opposed to the original VR6; VW 034109309AD INA 420002210 Weight 80g/86g Google search "vr6 leichten hydrostossel" for more info. Quote Share this post Link to post Share on other sites
daves16v 1 Posted February 21, 2013 Looks like these are more suited to higher revving race engines, almost twice the price of standard. Quote Share this post Link to post Share on other sites
science 0 Posted February 21, 2013 Looks like these are more suited to higher revving race engines, almost twice the price of standard. That's right Dave, VW didn't bother because there's not much point in winding up a (standard)VR6 too high. The V6 Audi lump of the period used them and I think the limiter is set at 7200rpm. If anyone is interested in a set I've found a UK supplier which would work out to >£120 delivered for a set of 12. Only catch is they only supply in batches of 8 tappets. Quote Share this post Link to post Share on other sites
daves16v 1 Posted February 21, 2013 It's a little more than I'd like to spend as I'm doing chains and tensioners too. c Quote Share this post Link to post Share on other sites
science 0 Posted February 22, 2013 Yeah, it's not for me at the moment either! Quote Share this post Link to post Share on other sites