anthony280z2+2 Posted March 4, 2013 Share #1 Posted March 4, 2013 Just finished reinstalling the rebuild head.now everything is back in and ready to start. We did a valve adjustment, checked the firing order.i guess everything to start it up. I gave it some gas and it started up but, my first valve(exhaust) was making a sound like air escaping .not ticking.going back to the reason I got my head rebuild. The same valve was dropping the lash. I put it back on about three times but it kept on coming off.i guess what I'm trying to say is that did we mess up installing it or the head was rebuild bad or the head was in too bad of condition to be rebuild. .sorry if the description is too brief ask any question if It sound to confusing Link to comment https://www.classiczcars.com/topic/45910-new-head-in-now-having-problems/ Share on other sites More sharing options...
anthony280z2+2 Posted March 4, 2013 Author Share #2 Posted March 4, 2013 I used 0.08 for intake and 0.10 for exhaust on the valve adjustment Link to comment https://www.classiczcars.com/topic/45910-new-head-in-now-having-problems/#findComment-416784 Share on other sites More sharing options...
Zed Head Posted March 4, 2013 Share #3 Posted March 4, 2013 Did you re-use the valves? Sounds like one is sticking open, either bent or galled in the guide area. Link to comment https://www.classiczcars.com/topic/45910-new-head-in-now-having-problems/#findComment-416785 Share on other sites More sharing options...
anthony280z2+2 Posted March 4, 2013 Author Share #4 Posted March 4, 2013 All the valves are new. That's the reason I'm confused. Can the head be bad and the person that rebuilt it didn't check it right or something. Link to comment https://www.classiczcars.com/topic/45910-new-head-in-now-having-problems/#findComment-416790 Share on other sites More sharing options...
tlorber Posted March 4, 2013 Share #5 Posted March 4, 2013 How about the springs? Link to comment https://www.classiczcars.com/topic/45910-new-head-in-now-having-problems/#findComment-416795 Share on other sites More sharing options...
anthony280z2+2 Posted March 4, 2013 Author Share #6 Posted March 4, 2013 All new. Tomorrow I'm checking the compression. Was 0.08 intake and 0.10 exhaust good.thats on cold. And 0.10 intake and 0.12 exhaust on hot. We also replaced the timing, sprokets, tensioner. But I'm almost 100% we did it right. Link to comment https://www.classiczcars.com/topic/45910-new-head-in-now-having-problems/#findComment-416796 Share on other sites More sharing options...
240260280z Posted March 4, 2013 Share #7 Posted March 4, 2013 Was a new valve guide installed? Link to comment https://www.classiczcars.com/topic/45910-new-head-in-now-having-problems/#findComment-416817 Share on other sites More sharing options...
anthony280z2+2 Posted March 4, 2013 Author Share #8 Posted March 4, 2013 I'm thinking that they didn't replace the guide. That is one of our conserns blue Link to comment https://www.classiczcars.com/topic/45910-new-head-in-now-having-problems/#findComment-416840 Share on other sites More sharing options...
anthony280z2+2 Posted March 6, 2013 Author Share #9 Posted March 6, 2013 I did a compression test and all came out from 148 to 150. I would do a leak down test but I don't have the equipment. I'm also gonna remove the oil pump switch the position of the distributor. Making sure my timing is correct Link to comment https://www.classiczcars.com/topic/45910-new-head-in-now-having-problems/#findComment-417053 Share on other sites More sharing options...
Zed Head Posted March 6, 2013 Share #10 Posted March 6, 2013 The things that you're checking won't have anything to do with the lash pad coming off.Here's something that might cause your problem - a lack of lubrication. Make sure that you have oil coming from the holes in the camshaft or the spray bars. Maybe someone left the plug out of the end of the camshaft or blocked the oil passages in the cam towers, or you have a bent or clogged spray bar. Link to comment https://www.classiczcars.com/topic/45910-new-head-in-now-having-problems/#findComment-417054 Share on other sites More sharing options...
anthony280z2+2 Posted March 6, 2013 Author Share #11 Posted March 6, 2013 Zed head. My lash pad doesn't come off no more. I got it rebuild but after I put the new head I turn it on and it seems like the same valve it making a sound. It sounds like pressure releasing. That's why I think that the guy didn't do a good job.before and taking it back I want to make sure it wasn't my fault Link to comment https://www.classiczcars.com/topic/45910-new-head-in-now-having-problems/#findComment-417055 Share on other sites More sharing options...
Zed Head Posted March 6, 2013 Share #12 Posted March 6, 2013 Sorry, your first post reads like it's still coming off. Not very clear what the problem is.How can you hear noise from the valve with the valve cover on? Are you spinning or running the engine with it off? OR are you hearing noise as you turn it over by hand with the cover off. You might just be hearing noise from the crankcase through the timing chain area as some cylinder pressure leaks past the rings. It's common to hear hissing noises if you're just turning the engine over by hand. They all do it. Link to comment https://www.classiczcars.com/topic/45910-new-head-in-now-having-problems/#findComment-417056 Share on other sites More sharing options...
Yarb
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