Question about 1985 Ford Bronco

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Noise theres a knocking noise in the front of the engine once it warms up the noise dissapperes bought a new battery and its a little hard to start

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I don't want to be the bearer of bad news but the engine has a bad rod bearing. This would create the noise you're hearing and because of the fact that there's excessive clearances at the crank, this makes it a little hard to start now.

Posted on Jun 22, 2008

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2001 azteck 49000 miles use very little once every


The 3.4L engine has special pistons that are designed to expand as the engine heats up. When the engine is cold, the pistons make a knocking sound that resembles lifter noise or piston slap. As long as the noise goes away after the engine warms up, don't sweat it; this is normal.

Sep 17, 2014 | 2001 Pontiac Aztek

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What could be wrong if I hear a knocking in the front of the engine and the engine is hard to start, as well as the engine will not idle?


Automatic idle module isn't working. Isolating the knock is going to be more difficult. There are many reasons an engine knock develops. It will take a good mechanic to tell for sure.

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On a very cold start (eg winter) older Subs often make knocking noise from the LHS of the engine. This is actually quite normal and is a "feature" of the oil paths in the engine. It goes away once the engine is warm.

Might also be the cam belt hydraulic sensor working loose. The tensioner pivot bolt can be done too light or fitted clumsily, and it strips the thread. If it gets too loose, the belt can jump teeth and bend valves.

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I have a chirping noise that starts when I start the car. It used to die down as I would drive, now it's louder and does not go away as before.


The chirping noise is probably a worn belt
You should check all pulleys and belt tensioner for alignment and or looseness
The knocking noise could be an internal engine noise
Which is common for the little 2L engines and I'm just guessing that's what engine you have
Make sure to use a good quality oil filter to prevent oil drain back and also the proper weight of oil
Too thick of oil can also cause this until engine warms up
You should use 5w30 or 10w30
The owners manual may say and sometimes the oil cap will give the recommended weight of oil

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Knooking in bottom of engine for an 1985 dodge d50


bottom end noise usualy the knock of death for most engines
tap noises are lifters knock is crank or rod bearings. driving will only spin a bearing or weld it to the crank
if the truck worth it...used engine from auto wrecker
or spend that money on new ride

Feb 02, 2012 | 1985 Dodge Ram 50

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Hard to say over the internet but I will try to explain. If the noise is a distict KNOCK KNOCK and it sounds like it is coming from the bottom of the engine, then it most likely is a rod or main bearing. If it is a TAP TAP noise that sounds like it's coming from the top of the engine, then most likely a valve lifer is failing/failed.
the fact that it goes away when the car is warm, makes me lean towards a bad lifter. Normaly if a bearing is bad and knocking, the noise doesn't go away.

The KNOCK noise will be somewhat hollow sounding and the TAP TAP sound will be more solid. If the KNOCK KNOCK is solid, then a rod or main bearing has most likely failed to the point that a new/reman engine will be needed.

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you definitley seem to be getting oil in your combustiion chamber, pull your spark plugs and see if they are coverd in oil. if so your valve seals are bad, if not your piston rings are bad. As far as the kncking noise its hard to tell though a description, id have to hear it, but ill go out on a limb and say its in relation to the leak it could be a piston or valve knock. The garage heard the noise, ididnt so i hope i could help.

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Ok the knock is your flex discs on the drive shaft are bad along with the carrier bearing. Replace before you get stranded or it comes loose.
Fuel distributor may need work if it is hard to start when warm, Replace OVP relay by battery also, its always an issue.

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Experiencing a "ticking" "knocking" type noise when 1st starting the car in colder weather that goes away once the blazer warms up , any help ?? I was told it could be the exhaust manifold , or piston...


it may need a lifter or valve adjustment when cold they will tick or knock depending on how loose or worn out then when it warms up they swell with heast and noise stops. after adjusting or replacing it will stop making noise

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The idle issue is normal. The idle is controlled by the ECU. There are no adjustments for the idle. Regarding the knocking noise, that could be several things, and I am hesitant to comment without hearing it. Take it to a Toyota Dealer & have a tech listen to it. We are very good at identifying noises on the service drive.

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