Question about 1999 GMC Sierra

1 Answer

Ticking noise I have a low ticking noise as the crank goes around.. i dont think im going to throw a rod but i was thinking it could have something to do with the main bearing or the rod cap... anyone have a possible awnser...

Posted by on

  • 1 more comment 
  • hunter08_194 Dec 14, 2008

    the ticking is underneath and my oil gauge is kinda jumpy. its only got 127,000 or so i knew it wasnt a rod and i wasnt sure of the bearing

  • hunter08_194 Dec 14, 2008

    its on the same side as the cam as well toward the 4 5 6 pistons

  • Richard Scordino May 11, 2010

    Have an oil pressurt gauge? Whats it say? Is the ticking louder underneath than from above? Rods have a sort of hollow knock. Crank bearings are more solid in sound... "ticking is generally valve lifters or worn camshaft & lifters. How many miles on this puppy?

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • GMC Master
  • 6,982 Answers

Ok, if you have it narrowed it down to a specific area, try narrowing it down further by using a long (2foot or more) extension or screwdriveras a "stethescope". Hold one one end against your head in front of your ear and probe different areas near the noise 'till you hear it the loudest, (I'm not kidding... this works) Be careful where you put the probe... the engine is running... stay away from drive belts and any other rotating stuff!
With what you have said, I'm sort of leaning towards a valve lifter at this point. PS: which engine is this?
The oil pressure thing concerns me... What is the exact pressure at idle hot and cold? what about at 1500rpm? If you have not been doing regualr oil changes, you could have something simple like gummy residue. If you have been using a high parafin based oil (usually really cheap stuff) this can happen even with properly timed oil changes. (once saw an engine with similar miles with enough sludge in it to make two softball sized globs just using what I found inside the valve covers, yet oil was changed every 3000 miles!) Though I don't like promoting products, I recommend changing your oil now, using any good synthetic and a pint of Marvel oil +good oil filter. (unless you have been using similar all along) See if after a few days the fluctuations in pressure and noise diminish somewhat. Get back to me on questions I asked.
Good Luck

Posted on Dec 14, 2008

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Why is there a ticking noise in my engine?


Richard, It could be something as simple as a bad belt tensioner to something as major as worn bad rod or crank bearings.
Best to find a knowledgeable buddy or a mechanic you can trust and have them diagnose.
Hope this helps you out. Good luck.

Apr 02, 2016 | 1996 Mercury Cougar XR7

1 Answer

What could have happened to the oil in my car?


Oooooooo... I think that engine is GONE, Miguel... not even rebuildable, I think it's ruined.

The drain plug or oil filter may have been loose, allowing the oil to drip out, but since you didn't find any oil on the ground, that's doubtful. What's MORE likely is that you threw a rod (the rattling noise), and that rod broke a hole in the side of the crankcase and blew all your oil out the hole. If I'm right, that engine can't be salvaged... none of its internal parts are good for anything but scrap metal now.

Aug 10, 2014 | 1994 Chrysler LHS

1 Answer

Crown victoria making knocking noise


Listen to the engine, if the noise is down low it is rod if it is up high it is valves. IF it is rod knock it will eventually throw the rod.

Feb 03, 2014 | 1993 Ford Crown Victoria

1 Answer

Well i have been told i am leaking oil from the front seal and oil pan. second off i was even told that my car sounds like the rod about to go through the crank shaft. it only taps when i run to much .


If the car is run or has been ran to many times or to long with low oil, then the rod problem could very well be true. But rods usually knock at the first start of the engine and then goes away. ( oil pressure builds up). If yours makes the noise after the engine is hot and been running for sometime, I would suspect the lifters tapping. This could be from low oil, from the oil not being changed (low viscosity), Or the engine is just to hot. You will need to listen to the noise the next time it comes up and determine where it is coming from. Top or Bottom. I would try to fix the oil leaks. I would start with the front seal, to see if it is just throwing oil around the oil pan.

Sep 08, 2011 | 1993 Chevrolet Lumina

1 Answer

There is a knocking noise under hood think it may be a lifter is that something that can be fixed with out going to a shop?i put some lucas oil in it the noise stoped for a day our so i dont wount to have...


Have you checked the oil level on the dipstick? Low oil would cause the lifters to make a ticking sound. This noise will be coming from higher in the engine like under the valve covers. If the oil is full, you may have a lifter that is sticky. There are products you get at any auto parts store to add to your oil to free up sticky lifters and quiet them. However, you said it's a knocking noise. Knocking would also result from low oil level. Seriously low! If the oil is full and you have a knocking noise, it could be main bearings, connecting rod bearings on the crank or the pins on the top end of the connecting rods that hold them to the pistons. It could also be the piston skirts banging on the side of the cylinder due to worn rings. Any of these knocking noises would come from lower in the engine like in the block. Again, there are products to add to your oil to add extra cushion between surfaces to quiet this situation but you may not be far from a major overhaul. You didn't mention how many miles are on the engine but very low oil levels could have damaged any of these parts quickly.
Hope this helps. Good luck. I hope it's low oil or stciky lifters.
TG

Jan 21, 2011 | 1989 Ford Bronco II

1 Answer

1999 suburban , seems that the crank is knocking hard. was going to purchase a crank and rebuild. what do you think?


It's proably a rod not the crank a crank noise would thump and be noisey on initial start up. a knocking or rattle is the connecting rod. I would get a price for a short block from jasper engines and not mess around if u havent done something like this before. You have to pull the engine and it's alot of knowing what your doing from there. Jasper offers a 3yr 100.000 mile warrantee if you want to keep the truck give em a call otherwise Call yr local boneyard for a low mile used engine but then again buyer beware.

Nov 03, 2010 | 1996 GMC Suburban

1 Answer

Feels like i have a dead cylinder


Throttle Position Sensor and NO you do not have to go to Ford and replace the whole Assy. The auto part stores have the sensor for about $70 and less on Amazon. The black smoke was unburnt fuel most likely from all the cranking and confused PCM and its imputs trying to determine fuel stratagy. Those noises are something you work on after you get the engine performance fixed. Don't throw parts at it. The TPS is just one possible cause,now you need to look for codes and then test for bad sensors etc. Codes alone don't tell you a part is bad. Code are set based on computer inputs out of range over a number of drive cycles or not seeing what a PCM should see while cranking.

Feb 06, 2010 | 2004 Ford F150

1 Answer

Have a 2005 for f-150 started with ticking, knocking noise with no power. they changed the spark plugs did not help the truck is at Bickford Motor in Snohomish wash. they think it is the cam. do you have...


The ticking would be a bad valve lifter, bent or broken push rod
As far as the knocking, could be:
cam bearing, or cam
crank bearing
rod bearing
Might even be the knock sensor.

Jul 22, 2009 | 2005 Ford F-150

1 Answer

Tapping noise


A tapping sound could be lifter tick, or rod knock... if it goes away, what you have is lifter tick, check your oil, low oil makes it worse.

Oil pumps up the hydraulic lash adjusters in your valve covers, at lower RPMs, the oil pressure is lower and will not fully pressurize them. Try holding your rpm at about 3500 or so with the car in neutral (parked) and see if it goes away, it should.

In later years (I think starting in 97 or so) mitsu started using a larger bore so called "third gen" lash adjuster. They don't tick as much, but they still do at times.

The good news, lash adjusters are not THAT hard to replace, figure a set of 24 will run you less than 150 in parts.

The better news, it doesn't hurt anything, as long as you can live with the sound, there isn't any reason to change them.

Good luck,
Scott
Iceman_ii on 3si.org

Sep 23, 2008 | 1994 Mitsubishi 3000GT

Not finding what you are looking for?
1999 GMC Sierra Logo

122 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

70346 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

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

Answer questions

Manuals & User Guides

Loading...