MJLamberson Posted February 2, 2008 Share Posted February 2, 2008 In my 280 today I was revving the engine to about 6 k once or twice, and now the car runs like crap, huge power loss. everything is still plugged in and all, any ideas? almost seams like its only running on 4 cylinders, It has done this once before but it fixed it self very fast, now it runs like crap. Quote Link to comment Share on other sites More sharing options...
myplasticegg Posted February 2, 2008 Share Posted February 2, 2008 did you check your vac lines for debris or cracks? shane Quote Link to comment Share on other sites More sharing options...
datsun40146 Posted February 2, 2008 Share Posted February 2, 2008 My bet it is related to your valve train. Check your valve clearances. Quote Link to comment Share on other sites More sharing options...
Dragonfly Posted February 2, 2008 Share Posted February 2, 2008 My bet it is related to your valve train. Check your valve clearances. Thats what I was thinking. It is not uncommon for an engine with a lot of miles on it to pop a rocker off when revved that high. Pull the valve cover and do an inspection. Dragonfly Quote Link to comment Share on other sites More sharing options...
MJLamberson Posted February 2, 2008 Author Share Posted February 2, 2008 Thats what I was thinking. It is not uncommon for an engine with a lot of miles on it to pop a rocker off when revved that high. Pull the valve cover and do an inspection. Dragonfly and what should I be looking for? also, when it first did this the problem went away in a short period of time, is that possable with the valve train? Quote Link to comment Share on other sites More sharing options...
MJLamberson Posted February 2, 2008 Author Share Posted February 2, 2008 so can anybody tell me what exactly I should be looking for? I hate to keep bugging you guys but you know how it is when something is wrong with your car Quote Link to comment Share on other sites More sharing options...
dig280z Posted February 3, 2008 Share Posted February 3, 2008 Have you pulled the valve cover off yet to see if some thing looks out of place ? Quote Link to comment Share on other sites More sharing options...
MJLamberson Posted February 3, 2008 Author Share Posted February 3, 2008 Have you pulled the valve cover off yet to see if some thing looks out of place ? I was working half the day and the other half it was raining:sour:. if the weathers not to bad will you bring yours over so I can see what it should look like? Quote Link to comment Share on other sites More sharing options...
dig280z Posted February 3, 2008 Share Posted February 3, 2008 I will see what i can do Quote Link to comment Share on other sites More sharing options...
dig280z Posted February 3, 2008 Share Posted February 3, 2008 oo yah i wint back to the pick and pull and got the sway bars f / b and it was $28.80 for both. do you remamber what brand they are? Quote Link to comment Share on other sites More sharing options...
MJLamberson Posted February 3, 2008 Author Share Posted February 3, 2008 oo yah i wint back to the pick and pull and got the sway bars f / b and it was $28.80 for both. do you remamber what brand they are? moog or something like that, Ill be going back for the shocks as soon as I get my car running right, maybe tomorrow if Im lucky, but I dont think I will be Quote Link to comment Share on other sites More sharing options...
Challenger Posted February 3, 2008 Share Posted February 3, 2008 I doubt youll need to see another head to notice if there was some kind of valve train failure. Look for things the are cracked, missing... Quote Link to comment Share on other sites More sharing options...
MJLamberson Posted February 3, 2008 Author Share Posted February 3, 2008 anybody want to give me a worst case scenario? Quote Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted February 3, 2008 Share Posted February 3, 2008 anybody want to give me a worst case scenario? Rocker arms are lying everywhere and your car randomly bursts into flames. Evan Quote Link to comment Share on other sites More sharing options...
Guest TeamNissan Posted February 3, 2008 Share Posted February 3, 2008 Rocker arms are lying everywhere and your car randomly bursts into flames. Evan hahahahahaha Quote Link to comment Share on other sites More sharing options...
MJLamberson Posted February 3, 2008 Author Share Posted February 3, 2008 Quote Link to comment Share on other sites More sharing options...
Dragonfly Posted February 3, 2008 Share Posted February 3, 2008 so can anybody tell me what exactly I should be looking for? I hate to keep bugging you guys but you know how it is when something is wrong with your car Been gone all day... When you look at the valve train look to see if one of the rockers has popped off of a valve. Most likely if it has the rocker will be laying loose in the area below the cam, also you will find a valve spring assembly with no rocker on it and it would most likely be missing the lash pad as well. Take a look at this thread to see pictures of everything I am talking about http://forums.hybridz.org/showthread.php?t=126252. Below is a picture of what the valve train would look like if missing a rocker. If it is not something this simple your going to be quite busy wringing out the problem. Any way let us know what you find after pulling the valve cover. Dragonfly Quote Link to comment Share on other sites More sharing options...
MJLamberson Posted February 3, 2008 Author Share Posted February 3, 2008 will do, and thank you, also, are those rockers easy to replace_? Quote Link to comment Share on other sites More sharing options...
Dragonfly Posted February 3, 2008 Share Posted February 3, 2008 If you find it has come off and you want to put it back on make sure that the cam lobe is pointed upward like in the photo. It will take a little bit of work to get it back on as well as the very real posiblity of adding a little of your own blood to the oil. If you do not have a valve spring compressor that will work with the head on the engine the best way to put the rocker back on is to take two fairly large flat head screwdrivers, place the tips on either side of the spring retainer (make sure your lash pad is in place and facing the correct direction first) with the shafts coming back towards you on either side of the cam lobe. Using one hand to raise the backs of the screwdrivers and the cam as a pivot point to push the spring down carefuly put the tip of the rocker onto the lash pad and the back of the rocker over the pivot, now release the pressure on the screwdrivers and everything should be good. It would also be a good idea at this time to check your valve lash on all your valves. Also if the screwdirvers just will not stay on the spring retainer go ahead and lower the pivot as far as you can and you may be able to put the rocker on without compressing the spring any but if you do that you absolutely have to reset your valve lash on at least that one. Dragonfly Quote Link to comment Share on other sites More sharing options...
bucket240z Posted February 3, 2008 Share Posted February 3, 2008 i have an extra head chillin in my garage and you can have it if you need it...for a price that is;) Quote Link to comment Share on other sites More sharing options...
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