Loud knock noise that goes away after 1 min cold start

Loud knock noise that goes away after 1 min cold start - LS1Tech.com

My 148k mile 1998 LS1 has a LOUD knock from the lower end that will last anywhere from 20 seconds to 1 minute on a cold start. Then after that the noise ...

I'm getting an engine knock when I first start my car in the morning. Is ...

I suggest you have your motor mounts checked. One of the few things I can think of that would cause a thump like that is a bad motor mount ...

Cold start knock | BobIsTheOilGuy

Piston slap is one of the few things that is loudest on startup, and quiets down in a minute or more of warmup. Other than that, some sort ...

LOUD cold start knock ... goes away in 20-30 seconds after startup

the engine knock when cold and under load the first few minutes of starting the vehicle , is for some normal. this is because GM screwed up on ...

Engine Knocking on cold Start - Car Talk Community

If the knock totally disappears when the engine is fully warmed up piston slap is a likely cause and rod knock is considerably less likely.

Knocking noise when cold | Chevy Silverado and GMC Sierra Forum

The knock noise is most often noticed during initial start-up and typically disappears as the engine warms up. The noise is usually more ...

Knocking when cold - goes away when warm | S-10 Forum

I would describe the sound as what you might hear in an early stage rod knock. The thing is, the issue only happens when it is cold, say 35F or ...

Engine knock on cold start : r/AskMechanics - Reddit

A knocking noise means the engine internals are loose. Once the engine warms up and the internals expand, the noise goes away.

Engine tap/knock/noise within a few seconds of starting

If the noise disappears when engine reaches operating temperature, more oil is going up, the pump maintain enough oil pressure to fill the gaps.

Engine Knock During Cold Start - North American Motoring

Reason this happens is because the valve lifters "bleed down" from no oil pressure after the car sits for a while. Since these engines have ...

My vehicle knocks lightly when I first start it in the morning but once it ...

It could also be a leaking manifold / Broken bolt on the manifold. The ticking noise of that will also go away sometimes as the manifold expands ...

Knocking noise only during cold start? | NAXJA Forums

Probably valve rattle. Do you have a helper? Get a mechanics stethoscope and listen to the engine while your helper starts the engine (do not ...

Loud knocking at startup when cold - Honda Odyssey Forum

I have a loud knocking at startup when the engine is cold. It goes away and sounds normal after about 2-3 minutes.

Knock sounds when cold start. - Ford Truck Enthusiasts Forums

Yessir, on cold start, different expansion rates, iron block versus aluminum alloy pistons, plus incomplete combustion definitely equals smoke ...

Tapping Knocking when cold after reving Help? [Archive] - SXOC

It could be a valve lifter, mine does that sometimes. They are hydraulic and if the oil has drained away it might take a few seconds to get back all the way to ...

knocking on cold start?? - Cadillac Owners Forum

I would check for an exhaust leak at the exhaust manifold if it's going along with the exhaust pulse. A manifold leak can sound like a knock sometimes and seal ...

Engine knock from cold start | Baby BMW Forum

The noise sounds similar to a bad timing chain but is only noticeable once I start driving and gets louder as I increase the revs so at idle you can't hear it.

Cold Start Ticking/Tapping/Knocking Noise - Honda Pilot Forums

If you experience a fast-tapping noise at cold start up that fades as the vehicle warms up it is likely that the timing belt tensioner is going out.

engine noise when cold at startup. - Hyundai Forums

Could just be the heat shield rattling. I know mine does at certain idle RPM when it first starts up. AnarchySoftworks.com - Website for ...

knocking sound right after starting engine, but then goes away??

It is valve related. I say it's cold start or maybe one or two valve is off. Anyhoo, get a Valve Adjustment at the mechanics. For $55 bucks. It's a good ...