thxone

My buddy helped me a while back to adjust my valves, I had to call him on the phone and he thumbed through his Chilton and told me the settings. The thumbnail is what he said the book said to do. I am going to re-adjust my valves tomorrow and I wanted to know if I should adjust them to different specs than what I was told. I am not sure if the specs he sent me were for a "fresh valvetrain" as mine is not with 93,XXX miles on the original stuff. What would you all do? They have started ticking again since my overheating thing happend. I would like to quiet them up for a while but I cannot get new parts yet, so these will have to last a bit longer. Thanks guys.

Attachment 4768

jfairladyz

those specs he gave you are the Nissan recommended specs. The tighter clearance is the intake valves, while the wider is the exhaust valves. The intake valves very rarely need to be adjusted however. It's usually just the exhaust valves that are out of whack. But check them all just to be safe.

WildmaN

Also what the Z guru here told me is they need to be adjusted every 15k miles or so. Because mainly we don't have lifters on our L28's. Sometime soon, I want to get mine adjusted. I haven't adjusted mine since '02, when I had my head replaced on my '81 motor. Which is in my '82 now.

NismoPick

Getting a manual of your own is always a good investment

Here's a scan from my Haynes:

thxone

So then I should not adjust them to a different spec then to compensate for wear? And for clarification I used the feeler gauges that look like flat slivers of metal---> when I use these, should I be able to move them freely or should they be tight between cam lobe and the arm or should they move but with resistance?

thxone

Damn I take to long to type...Thanks nismopick, thats what I was looking for. I am hunting down a manual as we speak...well type.

thxone

Acording to that, I did it correctly when I adjusted them the first time...so it should be old hat this time...you guys rock, and hey check it out, my post are over 200. I feel special.

NismoPick

That's what you ARE doing....

With one hand, be moving the feeler gauge... with the other, be tightening the rocker locknut, until the feeler gets sticky... not so tight that you can't pull it free.... but you should feel some drag.

thxone

That sounds cool to me, but when I did this before, its almost like you need a third hand because I would check with the gauge after tightening the nut ( the one that locks it all into place) and I couldn't get the gauge back in...I may try a slightly different approach tomorrow.

thxone

One more question...after reading your pics NismaoPick it says to adjust the first set with the #1 lobe in the up position. Do I adjust 1 3 7 8 9 and 11 with the #1 lobe up or do I have to adjust #1 then turn the crank till #3 is up and adjust it and so on? Because thats what I did and if I read that correctly it say adjust them all with just #1 pointing up then when its down do the others...Help me O wise one.

NismoPick

When I do it... I just go through & adjust all the ones that the cam lobe is facing more or less up. The lobe part of the cam just needs to be NOT touching the rocker at all. But when ya need... just flick the key real quick to move it.... or have a rachet on the crank to manually move it to the desired position.

thxone

Sounds like a plan, we are cool here, thanks.

EatmyDust

if the rockers are still too loud for you add a little por point supresant in your oil like lucos or somthing, not much.

SHADY280

dont forget to do the adjustments when the car is warm, it makes for a better adjust, i get someone to keep moving the feeler when im tightening so that it is perfect, its harder alone, but not too bad

PooFlinginMonke

Funny thing is that many will actually get a closer tolerance as the valve sinks into the seat from mileage.

Bleach

Isn't that only on the 1975-76 heads? E47 or something like that? The P79 has hard valve seats and they dont' usually sink.

jfairladyz

on my P79 my exhaust tolerances would get tighter whereas the intake valves would have excessive clearance. I can't say whether its from valve sinkage or not though. My P90 is hydraulic so I dont have to worry about any of that for now.

Bleach

ok. On my P79 with 233,000 miles now I never see the valve clearances get tighter. They are always going loose... slowly. Seems like I have a good head.

EatmyDust

Well yea the 76 heads have hard seats. but if you have had machine work like I have 3 angle grinde well I am woundering how that is going to afect how often I have to adjust mine. all my valve train parts including springs are all bran spanking new.

SHADY280

with new stuff, i have found that you must adjust about every 2 weeks or so untill the parts wear in. the frequency lessend as time goes by, new rockers essecially need more attension then any other type of part swap.

jfairladyz

yeah the parts need a chance to develop their wear patterns onto each other. Once that happens the amount of wear each part endures becomes minimal compared to a new part because the parts actually fit together at that point.

EatmyDust

I just have to be carefull with my valve cover gasket taking the cover on and off to adjust. I am cheap, so if I can keep a part in good condition, I will strech it as far as I can.

Heat Rave R

In the picture in the manual, it says to use some kind of special tool to properly torque the locknuts. Judging from the looks of it, would a crowfoot socket wrench attachment work?

PooFlinginMonke

I use 14 and 17mm open end wrenches.

SHADY280

just make sure that they are tight, no need to exactly torque, unless your extemely **** about everything