I have to wonder.....how much compression can you possibly build when turning the engine manually? If your not strong enough to turn the car over manually without the plugs in it, then you need to get a gym memebership.

I agree that it's likely a severely bent valve. I would also be willing to bet that the piston is f*cked.

 

91ZXTT: How exactly would having the plugs removed make it easier to turn it over manually? You really shouldn't rotate the cams separate for the crank. It could cause the valves to hit the pistons; which is bad. If the engine is binding up when you turn it over manually, then there are some major problems.

in defense here, taking plugs out makes it easier to turn. that has been well explained. i wasn't ceat enouph when i said turn the cams. i meant see if one is locked up or much stiffer then the others. you can turn them a bit, and if you are being gentle it really wouldn't hurt much to tap a poston.

 

This is the first time I've ever seen someone needing to remove the plugs to turn it over manually; which is why I suggested a gym membership. How big is the ratchet you're using? Maybe you need to use a larger ratchet.

You still shouldn't turn the cams separately....you need to do a compression test. Since you have your plugs out, then you're already part way there.

Since it was more difficult to turn over manually with the plugs in only tells you that you have some compression and it doesn't tell you how many chambers have adequate compression; which is why you need to do a compression check.

 

lol, at 140psi + in a piston even though it does leak some, it can make it tough to turn over. i can do it yes, but it makes the world easier to take them out. plus some people get scared when the motor gets tough to turn over and think they will break crap.

 

if the valve is hitting the piston then what do i need to do?

 

Remove the head and have it fixed.

 

ok i started taking the heads of today.

 

my rebuild cost $600 with all new valves. its a really tough job. it took me 3 months and with including new fuel injecters it totaled $2500. good luck. feel free to ask for help. (you'll need it)

 

You need to pull the head(s) off the motor... it will be hard to find out what side is bad... Maybe time for a new motor???

 

A few bent valves usually doesn't necessitate a new motor.


$600 is kinda steep for a valve job.

 

no i am not going to get a new motor beacuase i wont to learn how to fix the 300zx motors beacuase i will buy a couple more zx's with bad motor and i am pretty sure i can do the job beacuse i rebuilt a v6 eclipse motor and a 240sx motor and a couple of hondas so i think ill be able to do it its just this is my first zx so it will be kinda tough for the first time will today i took off the intake collector and the injectors and almost got the intake manifold off but their is 2 bolts in the back that i could not get so i left it for tomorrow.

 

punctuation please

 

the only experience you would have with the motor when having it rebuilt is bolting it back up to the trans..

 

http://en.wikipedia.org/wiki/Run-on_sentence

http://en.wikipedia.org/wiki/Punctuation

 

Wow....just wow. You should be ashamed about your spelling and grammar. That's astounding. I hope your mechancial skills far surpass your English skills, but then again that wouldn't be saying much.

 

SCHOOL WENT TO JANE MONKEY APPLE CARBURATOR FISHTANK!!!!

 

What do you expect, he's a z32 owner...... wait, im in the s30 forums right?

 

banned....

 

f**k punctuation spelling and grammar!

 

uh... yeah... and you expect us to decipher everything you say (due to your laziness) so we can help you?

 

and i wouldnt swear in the tech sections.... we got a Z32 moderator that isnt fond of it. use punctuation... the tormenting will never go away if you dont. i should know, i used to be one of those people that got crap for it.

 

If that's what you really feel, then you should've just said ,"I'm ok with having people think that I'm retarded....because I am retarded.". That would've worked just the same and you wouldn't have offended anyone.

 

posts that are full of grammatical errors are terribly difficult and annoying to read. this is a forum, not a text message. proper sentence structure will go a long way. of course, if your attitude remains as it was in the quoted post, i can make it so there is no chance of the problem repeating. i am sure snw can attest to that.

 

yes i can ^^^^ im a role model, or is it a model example? meh

 

Even Bardabe has improved his grammar and spelling.