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-   -   90' 300zx non turbo (http://www.infamousnissan.com/forum/showthread.php?t=30539)

nismo_sean 03-02-2014 05:48 AM

90' 300zx non turbo
 
so i bought this car with the intent of fixing it up and auto-x ing the crap out of it..

here's the pics from the craigslist ad..

http://i1162.photobucket.com/albums/...ps85d385c9.jpg
http://i1162.photobucket.com/albums/...ps9e1b7f6b.jpg
http://i1162.photobucket.com/albums/...ps8434d247.jpg
http://i1162.photobucket.com/albums/...ps32664b2e.jpg
http://i1162.photobucket.com/albums/...ps797e1163.jpg
http://i1162.photobucket.com/albums/...ps7c768d8c.jpg
http://i1162.photobucket.com/albums/...ps928854a6.jpg
http://i1162.photobucket.com/albums/...ps81c10385.jpg


long story short, it ran (barely) when i bought it, i made it about 7 miles before it sounded awful and lost power and hitting the gas made it die..

i towed it home and got it in the garage..

http://i1162.photobucket.com/albums/...psfjhg5p6c.jpg
http://i1162.photobucket.com/albums/...psirif3l5b.jpg

took out these awful seat covers, lol

http://i1162.photobucket.com/albums/...psbyhaddyp.jpg

and got started pulling the motor apart to diagnose it..

the timing belt was intact(thank god) but it was a tooth off, not really surprised it ran like shit, lol

got it back in time counted the teeth on the belt like 6 times, even marked it lol did a leakdown test, and to my dismay the results came as so..

cylinder #1 - nothing, leaking out intake valve
cylinder #2 - 80% leakage, intake valve
cylinder #3 - nothing, intake vale leak
cylinder #4 - 25% leakage, good
cylinder #5 - 25% leakage, good
cylinder #6 - 80% leakage, intake valve

soo im pretty dissapointed with those results, i got the intake plenum off(what a pain in the a$$) and i pulled the intake valve covers, couldnt really see anything :( i guess tomorrow i will continue teardown.

i really hope a full head rebuild with all new valves and lifters isnt required, i cant afford that, lol

nismo_sean 03-02-2014 05:49 AM

more pics

http://i1162.photobucket.com/albums/...psvxa2kmhi.jpg
http://i1162.photobucket.com/albums/...psvxofkhau.jpg
http://i1162.photobucket.com/albums/...pslvxorvhk.jpg

nismo_sean 03-04-2014 10:50 PM

so, im getting antsy wanting to pull the motor out and see the damage, but its friggin' 15 degrees outside...

i cant wait until summer..

but i want to drive it this summer, lol i just can't win..

97_hardbody 03-07-2014 01:20 AM

Damn. That was my dream car in high school too. What plans you have for the motor now? just doing a rebuild and keeping it stock or adding power for your auto-x enjoyment?

nismo_sean 03-07-2014 03:24 AM

internals will be stock, but i would like to do headers back, full exhaust, and maybe some motor mounts, mostly i will be doing suspension mods to make the most gains though..

..not much progress yet, lol, its been sleeting all afternoon and theres a layer of ice on the driveway maybe 3/4 inch thick so far.
i did get the cat back section of the exhaust off earlier though.
hopefully i can get the trans out this weekend..

nismo_sean 03-07-2014 03:27 AM

also after some thorough research i found that the early models (such as mine) the intake valves were made of a softer inferior metal and were prone to wear and bending :(

i also found a guide on how to clean/rebuild the hydrolic lifters, that alone could save me $700!

i am already expecting to replace all the intake valves, maybe(hopefully wont need to) replace the exhaust valves.

new rings and bearings for the bottom end while i have the motor out and apart..

this will probably turn into a very slow build..

nismo_sean 03-14-2014 10:04 PM

so here is where im at going into this weekend, got the exhaust off..

http://i1162.photobucket.com/albums/...psm0vjvpqg.jpg

make a very wobbly extension...

http://i1162.photobucket.com/albums/...psuxhgqqjm.jpg

...and pulled the trans.

http://i1162.photobucket.com/albums/...pssgpp1qdo.jpg

the head bolts were M10 allen keys... :( that was fun...

three easy steps..

1
http://i1162.photobucket.com/albums/...psctednbn1.jpg

2
http://i1162.photobucket.com/albums/...psor23nrm3.jpg

3
http://i1162.photobucket.com/albums/...ps0eib9oq4.jpg

http://i1162.photobucket.com/albums/...ps5js2ai9q.jpg

http://i1162.photobucket.com/albums/...pscejchlah.jpg

http://i1162.photobucket.com/albums/...ps1jdusirr.jpg

http://i1162.photobucket.com/albums/...psrqrjpii4.jpg

good intake valve on right, bad one on the left...

http://i1162.photobucket.com/albums/...ps3cmzoncd.jpg

alabama_lowlife 03-14-2014 11:11 PM

Go ahead and replace the efi harness and all the damn fuel injectors while you have it apart!! I'm not even playin, save yourself some MAJOR headaches later.

nismo_sean 03-15-2014 03:01 AM

yes, i am definately replacing the efi harness, probably the alternator to trans harness too...

nismo_sean 03-26-2014 02:59 AM

UPDATE!!

found a silver paint factory... :/

http://i1162.photobucket.com/albums/...psyg5rtu93.jpg

http://i1162.photobucket.com/albums/...pstoqpbajv.jpg

http://i1162.photobucket.com/albums/...psx7hbw9pq.jpg




heres a video of what rod knock sounds like...


http://i1162.photobucket.com/albums/...psxsyb9624.jpg


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