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1999mustang 6 lower end knock sounds almost like a rod berring?

I first thought it was an exhaust leak but i cant find a leak, my wife's car she said she can hardly hear it but when my brother got in the car he said it sounded like a rod, my wife drives 100 miles a day round trip we need to get it fixed, i am disabled but i can still work on a car and consider myself a good back yard maniac, can anyone help me diagnose this thing we have little money. thank you brad in az.

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  • Cars & Trucks Master
  • 533 Answers

Best way to check that is to remove sump and do a physical checkk

Posted on Dec 12, 2012

Testimonial: "thank you very much i must have a cat scan soon it is that simple thank you. Brad."

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6ya6ya
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Posted on Jan 02, 2017

Fixe_You
  • 1800 Answers

SOURCE: I HAD AN OIL LEAK

check ur model and statt from here

http://www.autzone.com/shopping/repairGuide.htm

plz rate

Posted on Feb 27, 2009

csmock132
  • 4669 Answers

SOURCE: Oil Leak (major) 1997 Camry 2.2 ltr.

The noise might be oil on the timing belt. The oil leak might be from the oil pump gasket. The oil pump is ran by the timing belt and the leak would saturate the timing belt. Inspect the belt

Posted on Feb 28, 2009

juncro
  • 467 Answers

SOURCE: Knocking (Pinging) noise heard when car is in drive

check the vehicle knock sendor, are u using the right grade of gas, and oil for u temp zone

Posted on Jul 21, 2009

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1 Answer

Can you fix a piston rod knocking without pulling motor,by dropping oil pan?


Depends on the car, Some you can some you cant. Generally speaking if the car has rear wheel drive and conventional gearbox you got a chance. Only way to tell is to look under the car and see how accessible the sump pan is

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Best way to check the knocking on the lower end of the motor 4.3 GMC do I take lifters off and check down through there


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Well CB....a knocking noise coming from the engine is never good news.

Typically any real ugly noise that stops an engine from running is catastrophic. With the info you provided...low oil pressure, excess oil in the pan, knocking engine sounds and a motor that will now, not turn over...sounds like a bent con rod caused by a failed main bearing.

1999 v6 pontiac exploded dia-homgkn40kjilovpbxhhmhqzq-1-0.jpg
The engine overheated so the first suspect is the cooling system, some engine designs require that the thermostat be installed with the vent or bypass hole in a certain position. Failure to position the thermostat properly can cause engine overheating.

Another cause of the dreaded knock is "Knocking and pinging" caused by a low fuel octane rating, carbon deposits on cylinder walls or incorrect spark plugs... all not good. I think you would have noticed if your motor was knocking and pinging for any extended period of time.

Excess oil in the pan gets frothed up by the crankshaft slapping it around and aerates the oil which decreases its shear strength, which is what keeps metal parts from contacting directly together.
This could ruin the main crankshaft bearings.

First thing I would do is remove all the spark plugs (to reduce engine compression) and place a socket on the crank pulley bolt and try to turn the engine over...you should be able to spin the crank....if you can't get the motor spinning..it's seized up.

Good luck !

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sounds like lower end bearing damage (connecting rod) when oil level drops at interstate speed a connecting rod bearing will seize very quickly thus causing the bearing to spin in the rod and enlarge clearance . that is the knocking sound you here .

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http://ww2.justanswer.com/uploads/JHoop/2009-01-19_070643_torque_specs.pdf

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That doesn't sound good. It appears you have 1 of 2 issues. The no coolant is a bad/blown head gasket or cracked engine block. When the head gasket is bad or block is cracked the coolant leaks into the cylinder blows out the exhaust (have you noticed the smell of coolant or white smoke in the exhaust) then runs by the pistons and into the oil pan (check your oil level it is probably way high) where it mixes with your oil and reduces its viscosity/lubrication. After prolonged driving with coolant/water in the motor your bearing will wear prematurly and cause parts to become looser then they are (hense the knocking sound). If you continue driving with the knock the motor will have a mechanical breakdown and more then likely throw a rod. THis is usually a motor swap at this point. Some mechanics will replace the bearings but either or you will nee extensive work to correct. The head gaskets need to be replaced/checked and the head for warpage/seepage and possibly a cracked block plus fixing the damage to the lower end. Its usually cheaper to purchase a new/used motor as this is somehting that will cost $1000's of dollars so please pick a reputable mechanic for this kind of work... If you have an extended warranty this is the time to use it..

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1 Answer

We replaced intake gaskets and now its making a loud knocking sound


Good day
which intake gasket need you replace upper or lower, did you remove the push rods if so did you put the right ones in the right place. intake push rod will be marked orange and are shorter, exhaust push rods are marked blue. it almost sounds like you might have put an exhaust into a intake.
hope this helps please let me know if this is not the case and we can go from there

Cheers

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