Question about 1991 GMC K1500

1 Answer

Engine started overheating then, really loud knocking. The engine died shortly thereafter before diagnosis could be made. Same problem happens when trying to start, but engine always dies. Dropped the oil pan and found an alarming amount of metal shavings, and knocking is bad.

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 145 Answers

As you've already realised, this is serious. The engine is more than likely totally shot. Maybe a broken valve and punched a hole in a piston. Broken piston rod maybe. It's been overheated and also probably blown the head gasket and warped a head. You're looking at a complete engine re-build already. I think I'd just buy a rebuilt long block and start fresh.

Posted on Dec 29, 2010

  • 1 more comment 
  • wowchar89 Dec 30, 2010

    Thats what Ive been told and surmised. I was afraid of that, what am I looking at in price? Because the engine was supposed to be completely rebuilt I have the reciept from the previous owner who got charged 2150.47 for a complete engine overhaul. I bought the truck of him while I was in Iraq. It sat for 7 months at my dad's house. He started it and let run for 15 mins every friday. I get home and it ran great for about a week, then just driving down the road one day 12 miles from my house, one minute everything was great the next, there was a pop, it started knocking really bad, and gauges all went awry, oil pressure dropped, heat went up, it was horrible. I love this truck. But from the looks of things, ugh. I just need to get some price estimates now, on time/cost to fix, OR cost to replace the block. Thank you for your time it's greatly appreciated.

  • Wisslindixy Dec 30, 2010

    Hey no problem, glad to help. Yes that price sounds about right for a rebuild. But that's one of the problems when someone rebuilds a blown engine. Unless they go completely through it all the way down to every last bearing and tolerance, all it takes is for them to get one thing wrong or just say, oh I don't have to replace the mainshaft bearings, they should be fine and they skip it. Then the thing just fails again before it gets 1000 miles on it. That's why I feel it's better to go with a factory longblock and start fresh. Here's a site that sells them. Good luck. http://www.chevy350engines.com/

  • wowchar89 Dec 31, 2010

    One thing was looking at. Was the Rod bearings. On the 3rd set, when i got to looking the rod itself was really loose (Also found out it was the cause of the knocking noise) but there was NO rod bearing...at all. So I was wandering if new rod bearings were installed(which they were) if they werent put in properly or not tight enough, could they have over lapped and be shredded..thus the cause of the the metal pieces in the oil? Because all of the other ones have bearings except for this one and its whats making that god awfull knocking sound. Going to take the covers off tomorrow, and get down to the piston thats on that rod to see what the damage is there.

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My altima start making loud knocking noises.as I was driving it turned off and I cannot start it back up.I tried boost off;didn't work!


The loud knocking noise indicates a major engine failure from overheating or bearing failure . trailer it to a shop and have it checked out

Aug 15, 2014 | Cars & Trucks

1 Answer

Oil pressure drops engine knocking and dies


Hi Josh, Sounds to me as if you've got serious engine damage. This will probably need a replacement engine or a rebuild. Sorry pal. Regards John

Feb 23, 2014 | 1998 Dodge Dakota

1 Answer

Car started knocking really bad got a cylinder 2 misfire code after opening coolant bleed valve with enging hot


Okay, it may be due to overheating, that may be the noise you heard, lets hope. first allow engine to cool, open radiator cap or the resivoir cap, which ever is the fill, remove the bleeder at top hose and fill radiator slowly until coolant comes out bleeder.

note if water pump was replaced due to leaking and engine was overheated at that time then it may be a good idea to replace the thermostat .
after filling is done start engine and allow it to run. watch temperature if temp start to climb past half way shut engine down and let sit for 5min. then restart and check level, in res do not open cap . feel air from fan and see if it is getting hot, this may take up to a half hour but do not drive,

A few questions, does this jeep have an electric fan?
when you heard the knocking was engine temp hot?
If you start jeep cold does engine knock?
Did this jeep get a new thermostat with waterpump job?
did it overheat when pump went bad and why did water pump get replaced?

sorry for all the questions ,just trying to get all the info to help you .

Dec 25, 2012 | 2004 Jeep Grand Cherokee

1 Answer

1998 ford mustang knocking noise, ticking sound, idling


forget the boyfriend and take it to an accredited service center for a proper diagnosis and quote
knocks are big ends or mains , and ticks are hydraulic followers
all could be a bad cam but a proper diagnosis will make sure

May 06, 2017 | 1998 Ford Mustang

2 Answers

My truck is making a loud knocking sound when I drive it


first you need to check the oil level (with engine off) if level is good than listen to engine knock with the hood open make sure it is coming from the engine and not the belt tensioner or something external on the engine,if nothing is found than engine will need to be repaired best thing is to bring it to a local shop for evaluation.best not to drive it much longer like this ,it could leave you stranded.

Nov 25, 2010 | 1994 Isuzu Trooper

1 Answer

While the engine quit and afer sittin for a short time started and went about 1 mile and engin died again. It wasn't overheating


without further diagnosis and proper testing equipment it sounds like you have a bad ignition coil or possibly a bad fuel pump. remove the fuel filler cap when this happens and listen for the fuel pump to come on when you turn the key to the run position. the fuel pump should run for 3-5 seconds. if it does the ignition coil is probably bad as the windings inside the coil can seperate when hot and reconnect when they cool again. good luck

Sep 23, 2010 | 1994 Ford Econoline

2 Answers

My 2003 L200 saturn is knocking really loud and it died on me at a stoplight.I just found out it was 4 qts low on oil and the light never came.It also smells like gas and it hesitates to start


You might have destroyed the engine. Id have someone look at it to determine if it's salvagable. A compression test may help, but if your bearings are worn out, your oil pressure will be low.

Mar 05, 2010 | 2003 Saturn L-Series

1 Answer

Real loud knocking noise when starting


this can be a serious problem, sounds like one of your engine valves, has the car overheated recently? if your valves bent, you need to take the engine apart hope i helped

Jul 27, 2009 | 2004 Ford Focus

1 Answer

1994 AWD Astro van overheated, then lost ALL power


it seems that the engine blew. the rings, rod bearings, main bearing etc. Sorry but it sounds like that. Especially the smoking at the exhaust. take it back to the one who sold it to you.If possible.

Feb 16, 2009 | 1994 Chevrolet Astro

1 Answer

Drive light flashing


What kind of loud noise was it, like a clanking a banging or a knocking????

Nov 21, 2008 | 1997 Honda Accord

Not finding what you are looking for?
1991 GMC K1500 Logo

Related Topics:

349 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...