are some answers to the common problems we've found with the 300zx. I plan
to do one about 240-280Z's soon.
main problems we see with the early 300's are:
Bad air regulators causing low idle speed when cold apox$125
Injectors leaking, dealer are replacing for free as a recall but this is
also a problem in that mechanics are not getting paid well by nissan to
do this and we have seen some shoddy installs because of this and they
won't accept responsibility.
Air flow meters are very easily damaged from dirt and cars will run very
poorly. Most common cause for running problems. Nissan dealer air filters
are a must. A new meter is aprox$550, python rebuilds are about $250.
Cam belts and tensioners need to be changed every 60K as valves crash hard
on these engines and cause alot of damage.
Electric adjust shock are very expensive to replace and dealer shock are
only ones that fit and work right $1200.
These cars get trans mounts that grown when accel. and when they get replaced
can accentuate drive shaft vibrations.
spark plugs are VERY hard to change-stupid design here.
than this, just the normal leaks ect. that other cars develop and the engines
are good for 200,000+ miles. Nice car for the money. If you ever think
you will want performance upgrade don't get non- turbo as nothing can be
done to improve the non-t cars. The turbo engines are just as reliable
as non-turbos and see very few turbo problems..enjoy...
the 90 and up cars here is what we've seen:
For some reason the 2+2's have probs with driveshaft vibrations the coupes
don't have, fix is new driveshaft $750
models have problems with oil line on right turbo clogging and ruining
turbo. Nissan has updated line with insulation on it to keep this from
reoccurring. We recommend replacing on affected models before turbo goes
Ign module recall-update. the oe module has problems and nissan replaces
them for free under warranty.
Camshaft adjuster noise-leaks. These cars have hyd. cam timing adjusters
that rattle and leak nissan has new version but this ones on you about
$400 apiece + labor.
Auto trans models have problem with planetary gears exploding and ruining
trans and radiator especially turbo versions. We don't recommend turbo
automatics to our customers.
engines seem pretty durable (alot better than turbo RX-7's!) but they use
some oil, must be checked regularly. We have seen several people run them
out of oil and ruin the engine. It's very expensive, and alot of labor,
to replace the engine even with used piece, especially the turbo models.
this is an overview of the common problems we've seen.