Question about 1990 Nissan 300ZX

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Leak in rad. Eng overheated, badly.Towed to rpr shop.After repairs never really satisfied with idle or performance. Weeks later engine would not start. They said engine shot. Timing chain "destroyed", entire part, not just a portion. Valve-stem shaped like a "J", metal in cylinder. Tehy said must have held at 5500 plus for some time. I am not a mechanic. Does that sound reasonable?

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From the sounds of it you either dropped a valve or the piston smacked up against a valve, but either way its major engine damage, sorry

Posted on Nov 11, 2010


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2006 suzuki forenza engine suddenly shut down while driving. DTc read p0700,p0705pq1881

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Overheating 97 Lincon Town car

Connie, Were the radiator,water pump and thermostat replaced to try and fix the over heat issue or as maintenance. Engine overheating can be caused by a lot of things, Leak in cooling system, air in system, bad rad. cap, slipping belt, faulty thermostat or installed upside down, faulty water pump, plugged radiator (inside/outside), collapsing rad hose, faulty cooling fan, leaking head gasket, sludge plugging engine water passages, poorly tuned engine, etc..
Take into a good shop for diagnoses and estimate for repair. Check the attached links,instruction and guides, Good luck
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Jul 21, 2016 | Cars & Trucks

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Well first off 2002 chevy blazer with 4.3 liter is losing water but no leaks. Then when it gets around 210 temp it begins to whine real loud and takes longer to shift from first to second. Engine light...

the check light means to SCAN it. (all cars, 1987 to now)
All posts are USA,

the water, coolant does lose coolant in 6 months of driving
but does not fast. so i presume you mean fast loss. like 1 day.

there are on 3 ways, (but inside leaks or outside are the 2)
so if no green AF on the ground nor on passengers toes (foot well)
then its internal.
way 3 is out exhaust tip. (seen as steam on a hot engine and said steam , smells sweat (glycol stench)
way 3 is just one more external leak , as steam>.....

that leaves, milky engine oil or the A/T (AUTO? TRANNY) the dip stick shows milky. (not pink/red. and clear but muddY)
the engine is first.
transmission is useless to any blown engine.
some newer cars the trans, has overtemp sensor that can force it to limphome, mode. 210 is not hot. some cars run 200f thermostats.

first off stop using the side expansion tank for diagnoses.
some lie. (eg. dip tube in tank bad,)
use the RAD cap test method., look into the RAD cap filler well.
is it REALLY full , dead cold ?
if not , bingo. huh? (my guess is you did this already) methods?
fiddle the side tank later, find out if you have air in the system.

the tests for lost water are (no signs stated above)
1: RAD leak down tester
2: RAD green /blue die tester

a new rad cap is cheap, me i just inspect the gasket, like this guy.
see 17 signs of coolant lost there. and 24 causes.

some cars have 2 failures. a partial clogged rad.
then one more failure, breaks the camels back (heat load)

One other way to lose coolant is that it only loses it driving
and you missed that?
are you checking the ground at each trip, end? and after coming back.?

i bet the 17 ways to leak finds its.
but the system holds about 12psi hot. if not , fix that first.
we just grab the top hose on rad,and go to self, yah got full pressure.
and temp.
if it does hold pressure, and there is a breach idling hot.
its easy to see, it will leak now at 12psi , so look/
if its not leaking externally then its inside the engine or out the exhaust tips.
and if it overheats idling, all cars do of the fan is dead.
if it overheats, the fan must be active. if not fix that now.
the FSM book covers most the tests.

napa sells this ( finds cracked heads. or gaskets in head) or worse.

same with this too

Jul 06, 2014 | Cars & Trucks

1 Answer

Bad water pump symptoms

what are the.......?
overheated engine. (pinging to destruction)
leaking (same, end of engine, in many cases)

I saw a corvette going fast one day, and saw his lower rad hose fail
at 70mph. (catastrophic, looked like Niagara falls)
i honked and waved, he flipped me off, and boom
he burned is motor up. (you made me remember that, at my age amazing.)

lets do the leak test.
get engine fully hot. no 1./2 way , fully, fully is 180 to 200F .
gauge in dash be damned. I pyro gun it. The honda manual shows better ways, drive it 20 miles, park.
then let it idle , doing the RAD fan test in the FSM.
the rad fan comes on , this fact tells you its REALLY HOT AND NORMAL.
so now just look with eyes, keep hands in pockets.
look at every hose and cooling parts on engine
see leaks.
at this time there is 14PSI coolant pressure, and any leaks
are all very obvious, and childs play to find, just look, and bingo
all hoses, waterpump (and its weep hole) and the RAD.
all big and small coolant lines. (many)

Dec 03, 2013 | Honda Civic Cars & Trucks

1 Answer

Van keeps shutting off on its own and overheating

you mean the engine, overheats then the engines stalls.?
that latter symptom is normal for overheating.

(some exceptions, ) my Corvette drops cylinders, 1 by 1 to stop
this.(but is still bad , if this happens)

does it overheat only stopped, only moving or both? (KEY question)

fix the over heat, cause. there are may ways to overheat.
from simple to comlex. and no web bunny on earth can guess it.
ill list the simple:
1: low on coolant, no not the side tank, the actual rad is low,
check only on dead cold engine,below 125F (AZ temp)
2: bad RAD cap. not holding pressure.
3: wrong coolant mix or mixing 1 color coolant with another (bad)
4: water pump belt bad , or slipping or missing.
5: rad tubes clogged
6: fan dead,
7: RAD outside ofcore, blocked with filth.
8: blown head gasket,(or far worse)
9: bad water pump.
10: leaks anywhere, (this really is first)

one site that lists them all , every one,... is

Nov 08, 2013 | 1995 Honda Odyssey

1 Answer

Engine overheated due to broken impeller. Repaired and no leaks found in head gasket by VW. 5 miles later Beetle overheated and towed back..

how could they check for head warpage if they didnt pull the head and put it on a plate? Im calling poor diagnosis.

Sep 26, 2012 | 2002 Volkswagen Beetle Turbo S

1 Answer

Overheating, loss of coolant, reservoir not working

Sounds like to me your mechanic is on the right track by having the rad cap changed. If the coolant becomes low again in the near future and there is no visible fluid leak on outside of engine or on floor/ground then your problem is internal and possibly a head gasket.

Jun 22, 2012 | 2004 Kia Sedona

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2001 Pontiac Sunfire overheats and more

problem #2 sounds like you need a blower motor resistor.

Jun 26, 2009 | 1997 Pontiac Sunfire

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