TwinTurbo.NET: Nissan 300ZX forum - The ol' 96'er.....
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Subject The ol' 96'er.....
     
Posted by BOOZTD 3 on January 29, 2015 at 1:49 PM
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Here's quite an interesting and lengthy read for those of you who're bored.

I got a call from a lady in TX asking me if I did work on 300ZX's - that is the understatement of a year, lol.

She proceeded to tell me that a few years ago she was driving her 96TT on the highway and it started making a loud racket. She took it to Nissan and they diagnosed it with no compression on cylinder #2. She propositioned them to fix it and carte blance they told her it was too old and they weren't going to work on it.

The car sat at the dealership for about a year while she figured out what she wanted to do with it. She had gotten word that her parents had a trusted mechanic who lives up here in Illinois so she decided to have the car towed from TX to IL for him to work on it.

He diagnosed it s having broke a valve off in the chamber and that it destroyed the piston and rattled the valve around. She on that diagnosis, she had her father source a good conditioned longblock.

This is where things start to get fuzzy. The guy starts taking the car apart and then develops health issues so he can't work on the car. It sits around his place for a year and she goes on the hunt again for someone to work on it - this is where I come into play.

She contacts me a week or so into January and we begin talking, exchanging emails, and lining up a plan to get this car on to the road. The initial plan was pretty basic. Get the car, take the engine out, swap the turbos over, do a 120k, and re-install.

So I got right to work after picking it up 1/17/15

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Before pulling the car in, I decided to go ahead and prep the new engine (120k, gaskets, seals, etc) while there was plenty of space

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Torn down

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Cleaning it up

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Found this little booger

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I had to tear the engine down in its entirety because they dented the oil pan up when they were moving it, so we needed to swap those over too

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This is one way to fix a hole in the oil pan, right?

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Cleaning it up more

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New WP on

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Check out these old isolators

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You can tell it was sitting a while

 photo AEBE7178-BF4F-4002-9B3A-C6D1D2510708_zps0t332hyz.jpg

This is where I stopped with the new engine. I was told in the original emails they sourced a 96 engine engine so it was identical - well this was not the case. As soon as I saw the fuel rail I knew it was an early style TT. This creates a whole mess of other parts I have to transfer over because the camshafts are different, there are no VVT solenoids, and the VVT cam gears are completely different as well - more on this later.

So then I pulled the car in, to start taking the engine out. You can see it had some stuff pulled from it already. At this point I really don't believe the guy had health issues at all which prevented him from working on it. The reality is he got in over his head and I can tell exactly by which pieces were removed and where he stopped and said "fuck this, im out"

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A nice mess of crap up in the radiator/condeser

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Sweet battery terminal connections

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Well, there's why your heater sucked

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Coming apart even further

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Trans out, Engine coming out

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Found misc stuff just hanging out. Suspect these just loosened up with age

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So now the engine has to be torn completely down so I can transfer everything over to the new engine. Here's the pass side turbo stuff coming out

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Engine on the stand

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Prepping to do the water line bypass

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Plenum off

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Here's how the 96's are setup - solenoid blockoffs basically. No harness. Also notice the exhaust gas temp sensor on the EGR which is new to me

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Check out those isolators!

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EGR off, water pipes all off

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Now is where the differences between the engines really start popping out. These intake cams looked like aliens to me

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The cams no longer have the check valve in them

 photo 34A6E230-95EF-4087-BFD8-FDB68F1D4642_zpsxaowpumo.jpg

Here's an old cam for comparison

 photo 562552E1-DC08-463D-9FA9-55665D6B7309_zps6casopgr.jpg

Turbos off

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Everything apart

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So lets take a step back a little and remember that diagnosis. Supposedly a valve let loose and chewed through a piston. Well once I had everything off of the engine I needed, I decided to spend the extra 5 minutes and pull the heads so I could inspect.

I found the valve was hung open a little bit and I could move it with my finger - however it never hit anything

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Remember that piston that had a whole in it which was verified with an inspection camera?

Looks pretty good to me

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So I dig further into the head.....

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So unfortunately for this lady, she was instructed to buy a replacement engine which this realistically could have been fixed for significantly cheaper - however I am quite glad the engine came out because it gave me a chance to really inspect everything.

Old oil pan on the new engine

 photo 8463A612-D56F-498B-9700-D2ECF9328ADC_zpsnlo42vx7.jpg

New isolators

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I strongly advised her to do new injectors while everything was apart and luckily she agreed. I also had to swap the lower intake manifold over for the new style fuel rails

 photo B5AC92D7-783C-4242-94C2-43FB76EB2B5F_zps0ahh7jlc.jpg

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Swapping cams over

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Valve covers cleaned up and re-installed

 photo 2185ADEC-A09D-43FF-B0CB-0968F5B40DF2_zpshl44glp2.jpg

96 gear train installed

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Front of the engine buttoned up

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EGR system and coolant pipes back on

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Top end going back together

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So since I got a chance to thoroughly inspect everything, I made one huge discover - the passenger side turbo was seized up. This car is bone stock so there's no opportunity to go aftermarket. I ordered some new turbos for it which gave the budget a real swift kick in the junk

 photo 0C7F3F92-04FC-41EF-B4FC-B538F836D363_zpszidz5lf1.jpg

Turbo system going on

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I had to drill and tap this broken downpipe stud, that sucked

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Engine ready to go back in

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Going up......

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Settled in

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I do have one hot tip for you guys - Do you ever dread having to wedge the PS pump back in place because its such a tight clearance? Easy tip - take a 19mm socket and long m8x1.25 bolt and press it back a little bit

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 photo 07B85856-A02B-4EAF-B3FE-026D162A2813_zpskvyp19za.jpg

Voila - Now the pump slides right into place and is much easier getting the long bolt in

I found lots of broken connectors - managed to fix 95% of them with new stuff

 photo 84586308-17F0-470B-AC26-B909D0AB838A_zpsu3pyaigc.jpg

Found the trans harness missing a good section of covering

 photo 47C05AF6-A87F-40FB-A714-154279209015_zps5cxplr1d.jpg

Cleaned out the radiator too

 photo E46E12D6-D9DE-472F-AF94-A196E65934E2_zpsdne29gwy.jpg

So this thing has been sitting for a few years - I figured it should probably get some fresh gas

 photo 1E088B1E-3DE5-4AC2-A4B4-0D2E705B9F1A_zpsi2gv3lc5.jpg

 photo ADCFA207-AB66-41EC-8B6B-8FAE7BBDC00A_zpsvlgizpij.jpg

Repaired the battery terminals as close to factory as possible

 photo AF13345E-7B1D-410B-818A-834484F01113_zpsjxhb8zsu.jpg

Found some parts in my storage that she was missing originally

 photo C85B6195-E9D9-4C2E-B24F-7AA94A819ED8_zpsmjas4qdt.jpg

Got the car running and now that everything has been checked, damn that heater works well now!

 photo 66F4E228-C529-4356-B6B5-6D03F32CB74B_zpsqgouhg7d.jpg

After about 30-45 minutes of idling

 photo 3D3BE521-53F4-4460-96DC-58CD243DB99E_zpscvatbiuz.jpg

I also spent some time cleaning up the engine bay and making things presentable - its a LONG shot to where this thing was at when it came in

 photo 55E6573C-6D34-4992-B2F7-CFC3FD83139C_zpstdg4fem2.jpg

Its also a good thing I perform my due diligence when someone else has worked on the car. For some reason this guy decided to start removing suspension bolts

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Wheels were also on backwards

 photo E2F8B6DE-D9D7-4506-8738-977F90AE8605_zpscasodk9v.jpg

This car is much happier now

 photo 3494508E-23A0-4145-B75A-6F84659E2D89_zpsuavhqign.jpg

Total time spent was around 50 hours in labor and from the day I pulled it in to the day I fired it up was around 7 days. Pretty quick turnaround!

Cheers!






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