Jakob 1 Posted October 11, 2008 What is the differents of the 1.9 (XU9J4) and 2.0 XU10J4 head? Having a 2.0 XU10 block - how would the MI1.9 XU9J4 head bore fit on that? Share this post Link to post Share on other sites
B1ack_Mi16 67 Posted October 11, 2008 What is the differents of the 1.9 (XU9J4) and 2.0 XU10J4 head? Having a 2.0 XU10 block - how would the MI1.9 XU9J4 head bore fit on that? Just fine, combustion chambers are the same between the 2.0 and 1.9 litre heads. Only the 9 exhaust manfold studs on 1. 9 vs. 10 on the 2.0 is a big difference. But locating dowels on inlet manifold are also in different position, but rather use a 1.9 mi16 inlet than the S16 one anyway. Share this post Link to post Share on other sites
Jakob 1 Posted October 12, 2008 Just fine, combustion chambers are the same between the 2.0 and 1.9 litre heads. Only the 9 exhaust manfold studs on 1. 9 vs. 10 on the 2.0 is a big difference. But locating dowels on inlet manifold are also in different position, but rather use a 1.9 mi16 inlet than the S16 one anyway. Ok, thanks (again) - so when maybe considering BV 36,5 inlet valves, their should be no difference in obsitcals/potential. But, looking at valve flow clearance - I am wondering how the bore at the combustion chamber could be the same when you have different cyllinder diameters of 83mm and 86mm ?? - In either one of the cases there must be a mis-match with the cyllinder bore - or am I wrong? Share this post Link to post Share on other sites
B1ack_Mi16 67 Posted October 12, 2008 Ok, thanks (again) - so when maybe considering BV 36,5 inlet valves, their should be no difference in obsitcals/potential.But, looking at valve flow clearance - I am wondering how the bore at the combustion chamber could be the same when you have different cyllinder diameters of 83mm and 86mm ?? - In either one of the cases there must be a mis-match with the cyllinder bore - or am I wrong? The mismath will only give more squish in the one with 86mm bore. Not a problem. Also another difference is the vacum pump on end of inlet cam on S16, and the camsensor. Different termostathousing as well with oil return from the valum pump. Share this post Link to post Share on other sites
Jakob 1 Posted October 12, 2008 The mismath will only give more squish in the one with 86mm bore.Not a problem. Also another difference is the vacum pump on end of inlet cam on S16, and the camsensor. Different termostathousing as well with oil return from the valum pump. Ok, what do you mean by vacum pump on inlet cam?? - ignition vacuum altinator or what am I missing? Share this post Link to post Share on other sites
welshpug 1,661 Posted October 12, 2008 (edited) Vacuum pump for brake servo, only present in 306/ZX. Edited October 12, 2008 by welshpug Share this post Link to post Share on other sites
Jakob 1 Posted October 13, 2008 Vacuum pump for brake servo, only present in 306/ZX. Ok, didnt know that any of the pugs had brake servo. Thanks. Share this post Link to post Share on other sites
