madkaw

Some pics of what I have been seeing. The cam looked good but it is still at Schneiders for evaluation. You can see the build up on the back of my valves. looks more like 100k mile engine then a 10k engine. Lots of soot everywhere. The engine builder questioned my PCV system right away. Looks like I will be replacing valves and guides minimum. I still have no cause for high oil pressure, but I haven't plastigauged bearings or examined oil pump. Right now I am cleaning all the soot off the pistons tops and examining things there.

68 threads started in less than one year

Please only use enough air to fill the system. I think I had 10psi set on my airbrush compressor. Good luck

I had some success with my 71 system by pressurizing the vent system and looking for leaks with some soapy water. Use very little pressure. I hooked up air at the vent line that is in the engine compartment .

Original radiators are good, especially a 3 row. Find a local radiator shop to flush and pressure test it. For the most part the aluminum radiator is bling and saving some weight. When i took my 3 row to a local shop that's been doing this stuff for decades said he was impressed how well that radiator flowed. You could spend the money else where.

I had a situation like this working on a coworkers car. After doing everything -----including pulling the gas tank, I gave up. Someone else had found that this girls car had mice in there chewing her wires. Car would run and then quit for no apparent reason. I guess it was a wire giving out after being loaded for a while driving- maybe a ground, not sure. My guess is module or wire issue.

So when it does die on you do you immediately check for spark? It would take a second with a screw driver or something to jump the spark plug wire. Sures sounds like ignition

Bad terninology Zed. You are right, the seal rides on the crank. It's finished surface makes me call it a bearing for some reason. Zed, I was reminded of your posts regarding the seal and what was behind it and I see your point. I wanted to tie my pressure issue and leak together, but they do seem seperate issues. I did look at all bearings as i pulled the engine apart and so far everything as far as oil passages line up perfectly. Oil passages look clear and I have blown pressurized air through them. Still have some cleaning to do, but nothing jumps out at me yet. Need to check crank passages as you have said. Also going to disect the oil pump. Plastigage the bearings... ...and I am always open to advice and suggestions.

Well the motor is completely broke down with no drama. Everything inside looked like normal wear with nothing jumping out at me. The rear main seal that has given me fits did look troubling. With the block in front of me the seal didn't look parallel to the block. It was installed at the slightest of angle. After removing the seal I noticed a mark on the bearing where the seal rode. It looked as if I put the seal on dry and the seal left a burn mark on the bearing. So I guess I did something wrong. Atleast this time I can see what I'm doing when I install the seal. The plan is to plastigage the bearing to check for oil clearance and paint the block a color other then black. Clean pistons and inspect them. Then reassemble.

I don't know Blue, I think I would talk anyone away from points, just for the reason you stated. Reliability - especially high rpm== which can equal performance. Less moving parts is always a good thing . Stronger spark helps with lean conditions where the burn rate is slower. Electronic ignition to me has always been considered a performance upgrade with respect to points. IMHO

I've run a Schneider cam with good results

.... Or what he said^

...or just go to your local parts store and get a coil made for the ZX series

Talked to Kevin Cantrell at Schnedier cams and he said he would inspect my cam at no charge to check for any issues caused by my rockers. He said the rockers come from a MSA supplier when you order his cam kits- and they are no longer Nissans. He did say if a regrind was necessary he would do that at cost- whatever that entails. Hell- I might just go bigger anyway!! No updates from the machinists.

You forgot to mention that you can't drift a Z while reading a book.

Like the pumpkin colors! Looks good.

Walter makes a good point. Sometimes the rubber in the brake line becomes a check valve from deterioration . Don't under estimate the ability for air to hide. I went thru all of your battles with a 69 Mustang. In the end, it was air trapped in the front brakes. The only way I got the air out was removing the caliper and sticking a piece of wood in there to replicate the rotor. The wood thickness was enough to allow the caliper pistons beyond normal travel. When pushing the pistons back in I could watch the bubbles in the MC.

Very nicely done. I do think the right exhaust on these motors makes for the best sounding engines out there.

Been a while since I posted on this thread:) Well the glasspacks were getting loud and not controlling resonance like they used to. They were only about 20$ each, so I got what I paid for. I bought these magnaflow 4" round mufflers to replace the glasspacks. Hopefully all the SS will hold up longer. Too bad the engine is apart and I can't hear the upgrade. I have been so happy with the sound of this exhaust that i don't regret the time and money it took to do it. Don't know if it does anything to help performance, but I know it doesn't hurt the performance.

The head is in the machinist hands now. He agreed that he didn't like what he saw at initial look. Valves coming out as we speak to check guides and seats. Kind of anxious for the diagnosis.

I don't know Mitchell. I don't think you can make a blanket statement like that. I have read about too many strokers that have fell on there face. If the complete package is right, and the tune is done right, he should see 200HP. I'm not sure the components the Swede is using will be the right combo. I haven't read any hp numbers from any Eiji engines---confirmed by dyno. Still waiting on "kenobi' dyno run;) If you read the archives at hybridz, the N42 was not a good choice for hi-performance street, but better all out racer head. I'm also curious what head work is proposed by Eiji. Not looking for any secrets, but how big is the cam? The head work is everything on these motors. Just my opinions here from what I have read over the years.

I guess Blackbird didn't read my post

I have MS3 on my Z. Don't have time right now to help- if I can, but you should be posting on Hybridz if you haven't already

First post? Welcome! Fill out your signature so we know what year car you are referring to. The green wire or power on the early models weaves under the dash passenger side and then follows the harness along the passenger side. Should be green and black wires at the pump.

#1 - install 20$ gauge from autozone and observe oil pressure OTHER than an electric signal. #2 - the gauge is there to warn you of possible troubles. Things do change in an instant with 40 year old cars. Check complete coolant system