Quigs 1 Posted April 8, 2008 Hi there all. i have just changed the head gasket on my Mi16, i had to get the head skimmed, apparently he had to take a fair bit off. i have checked for fuel and a spark and i have them. i have also checked the timing again with the pin,s and that it is firing on 1 and rocking on 4, this seems to be ok. i can plug the the plugs in to the leads and rest them above the plug holes and get a flame out of the the spark plug hole so i must be getting fuel in and compression. Any ideas any one because i'm really confussed now??? thanks Ryan Share this post Link to post Share on other sites
pee vee 1 Posted April 8, 2008 sure the leads are round the right way mate? Share this post Link to post Share on other sites
Quigs 1 Posted April 8, 2008 sure the leads are round the right way mate? yes mate checked the leads about 3 times, i have just been looking at the head now and have noticed that you can push down on some of the tappets ( the things the cam pushes down on) but at least 1 for each piston is solid and will not move. could the hydraulic tappets locked?? there for when the cam is put in, could it be slightly opening the valve's?? i have taken the head back off now because i suspected a bent valve because the guy who skimmed it said he had to take a fair bit off. i'm so baffeled cheers Ryan Share this post Link to post Share on other sites
pee vee 1 Posted April 8, 2008 (edited) a very basic way to check for bent valves take cams out, so all valves are shut. then turn the head on its side, and pour water into the port.. if any water seeps past the valve/seat, then its bent... *** even a very slight bend can cause a misfire.. but for a car not to start at all, is a bit strange IMO *** this is obviously a very basic way! but its about the easiest way ive found to check yourself at home Edited April 8, 2008 by pee vee Share this post Link to post Share on other sites
Quigs 1 Posted April 8, 2008 a very basic way to check for bent valves take cams out, so all valves are shut. then turn the head on its side, and pour water into the port.. if any water seeps past the valve/seat, then its bent... *** even a very slight bend can cause a misfire.. but for a car not to start at all, is a bit strange IMO *** this is obviously a very basic way! but its about the easiest way ive found to check yourself at home i tried this earlier, i used thinners though only so it wouldn't rust, i had a bit seaping through on all of them( only done the inlets so far). You can not see that they are bent by eye. i thought the engine would at least try to start or cough and splutter though but i was getting nothing at all. Share this post Link to post Share on other sites
pee vee 1 Posted April 8, 2008 hmmm the last engine i tested like this ( rs turbo) water barely crept past one valve,, yet when it was on teh car it had a definite misfire... so yea, sounds like POSSIBLY taken too much off the head Share this post Link to post Share on other sites
gerlewislewis 0 Posted April 8, 2008 Youre getting fuel and spark, are you getting air? is the AFM and any associated earths all done up properly? Share this post Link to post Share on other sites
Mikey G 3 Posted April 8, 2008 Did you do a compression test before pulling the head back off? First thing i do now as it can give an indication of timing problems if you know how to read the results. Too much compression can also cause the mix to over compress and the spark wont light it. Share this post Link to post Share on other sites
luggy 13 Posted April 8, 2008 http://forum.205gtidrivers.com/index.php?s...c=88269&hl= Some of the info at the end of the thread might be of some use. Share this post Link to post Share on other sites
