Asked by Oct 25, 2016 at 09:01 PM about the 1989 Chevrolet C/K 1500

Question type: Maintenance & Repair

89 chevy c1500 5.7
I am lost.
It all started with some coolant loss here
and there. It gotten hot enough and
pressurized to blow the drain plug out of the
radiator. I replace plug. Flushed coolant
system (twice). Flow was good.   Drive ten
minutes. Overheat. Tried bypassing heater
core. Overheat. Took thermostat out.
Overheat. Flushed agian. Replaced
thermostat,water pump,heat sending unit,
the other sensor near thermostat( I forget
the name of it).  radiator,upper & lower
hoses. I have no smell of overheating and
the motor doesn't skip a beat. Oil is clean so
is coolant. Ran it a bit hot yesterday. After
an hr of cooling I did see water coming from
tail pipe. Then today when I left work atop at
the store (2mins down the raod). I came out
to see coolant leaking from rear of the
motor (passenger side)

Please share some input...

4 Answers


This started out sounding like a blown headgaskets problem, but now it sounds much worse like possibly a broke head or block. Pressurize the cooling system and see where the leak is, it is possible that a head gasket might have blown towards the outside.


Sounds like the intake manifold gasket or possibly a worn timing chain. If your valve timing is retarded (late) because of a worn timing chain it'll overheat. HTH. -Jim


Didn't think of the chain. Every now and then it does idle like the timing is off... But just at idle..

1 out of 1 people think this is helpful.

Yes I have been told it is a head or gasket hopefully its not the block. Thanks you

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • 2001 Chevy silverado overheating 1 answer

    Took thermostat out n still overheating.

    Chevrolet C/K 1500


    Maintenance & Repair

  • Our sons 1989 Chevy truck overheating 12 answers

    There's coolant in the container but when we open the radiator cap and look in yes empty every time after we fill it up and use the truck. The temp gauge will show its hot and car will show check te...

    1989 Chevrolet C/K 1500


    Maintenance & Repair

  • 2001 Chevy silverado overheating 1 answer

    Truck overheats real quick. Water in reservoir is boiling hot n water in radiator is cold. Why?

    Chevrolet C/K 1500


    Maintenance & Repair

  • Chevy silverado c/k 1500 1995 overheating 2 answers

    I have changed the thermastat water pump and fan clutch but truck still over heats....temp gage is at 240 when driving and 260 when stoped what could the problem be ......i do need to replace the ...

    1995 Chevrolet C/K 1500


    Maintenance & Repair

  • Overheating 1 answer

    My truck keeps overheating, I just replaced the thermostat and it is still overheating

    2007 Chevrolet Silverado 1500 LT1 Crew Cab 4WD


    Maintenance & Repair

C/K 1500

Looking for a Used C/K 1500 in your area?

CarGurus has 902 nationwide C/K 1500 listings starting at $2,500.


Search Chevrolet C/K 1500 Questions

Chevrolet C/K 1500 Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 3,320
#2 John Saffrahn
John Saffrahn
Reputation 2,500
#3 Rowefast
Reputation 2,040
View All

Related Models For Sale

Used GMC Sierra 1500
808 Great Deals out of 67,795 listings starting at $2,484
Used Ford F-150
2,211 Great Deals out of 205,389 listings starting at $1,499
Used Chevrolet C/K 2500
214 listings starting at $2,250
Used Chevrolet C/K 3500
223 listings starting at $4,995
Used Chevrolet S-10
8 Great Deals out of 1,349 listings starting at $1,395
Used Chevrolet Camaro
205 Great Deals out of 30,803 listings starting at $1,217

Used Cars For Sale

1998 Chevrolet C/K 1500 For Sale
172 listings starting at $2,500
1997 Chevrolet C/K 1500 For Sale
141 listings starting at $3,895
1995 Chevrolet C/K 1500 For Sale
108 listings starting at $2,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.