black66 0 Posted November 6, 2004 Removed my head today to replace it with one I have already rebuilt. However I've discovered a difference. See attached photos. One has a large cavity for oil to run out onto chain guide rail whilst the other has a small hole. I can't see it making much difference really, just wondered what the difference was. VW design change or something? Apart from that everything going well. Checked upper tensioner, showing very small signs of pitting so okay for a little while yet. Bores all show original honing and measure in tolerance, I was half expecting 1 and 6 to be worn but they are all consistant in both size and condition. Just bolted new head on and bolted up exhaust, thats enough for today though. Should be all plumbed in tomorrow and running smoothly. Surprised how easy the VR is to work on, was a bit worried was I was getting into at first but it's all a piece of cake. And I've gotta have saved at least £500 labour charges. 8) Quote Share this post Link to post Share on other sites
STORM 2 0 Posted November 6, 2004 Not much 'V' about the 'VR6' is there? Quote Share this post Link to post Share on other sites
PhatVR6 0 Posted November 6, 2004 It's a later head. it improves oil flow onto the timing chains. and it's what the american spec engines had on them because they had an "air pump" for emissions. no idea where it was pumping air to or from though... Quote Share this post Link to post Share on other sites
yellowslc 0 Posted November 7, 2004 you'll need to install a brass 3/4" freeze plug in the smog pump hole. Quote Share this post Link to post Share on other sites
