Question about 1993 Lexus Ls 400

1 Answer

Makes a knocking noise when starts and then goes away.

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 491 Answers

If this engine has hydraulic valve lifters, then it could be a weak hydraulic lifter that pumps up once the oil warms up. Hopefully you dont have low oil pressure. Does the oil light stay on for a while after you start the engine. If it does that could cause your engine to knock

Posted on Oct 05, 2010

Ad

5 Suggested Answers

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
  • 119 Answers

SOURCE: 2004 V6 cold engine noise related to steering - goes away after few miles

check pawer steering pump belt mybe it is worn out or loose, also check the alteranator belt.

Posted on Oct 18, 2008

Aj_86
  • 9 Answers

SOURCE: Cold Engine Knock on 1998 Dodge Neon.

sounds like a lifter my ford f150 does the same thing when its cold but then quits when it gets warm or it could be a weak oil pump. (just some thoughts)

Posted on Feb 17, 2009

  • 109 Answers

SOURCE: '96 VW Golf GL with 2.0 motor. Cold start knock

It sounds like the hydraulic lifters are bleeding down after sitting for a while... there are ball checks which are supposed to prevent this... Try using a good engine flush (a product that frees sticky lifters) and replace the oil with a good synthetic... Hope this helps...;-)

Posted on Apr 28, 2009

  • 1 Answer

SOURCE: knocking when first start engine

I had the same problema and it was the cam chain tensioner. It is a rather expensive part and can be done yourself if you are extremely careful to mark your timing before you begin. You can find the part form ECS tuning for around $350.00 but they can go as high as $600.00.

Posted on May 14, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

Engine makes noise when cold then goes away when worm


DUH, what kind of noise ? belt slipping, knock, tap, squeeling ?

Feb 22, 2015 | 1999 Porsche 911 Carrera

1 Answer

My 2003 x5 bmw 4.6is, makes a knocking noise in the Engine upon stating it up, but usually goes away after a few seconds.


Sounds like excess bearing clearance, when the engine sits overnight the oil between the bearings and the crankshaft is able to run back into the oil pan. When you first start it up it takes a few seconds for the oil pump to fill the spaces back up and you get some clatter.

Jul 26, 2014 | 2003 BMW 5 Series

1 Answer

Knocking in my 6vd1


Have the crankshaft harmonic balancer checked it may be coming apart.

Oct 30, 2012 | Isuzu Cars & Trucks

1 Answer

A knocking that starts when engine is cranked then it goes away


The knock is likely a worn connecting rod bearing. Are you using the correct weight of oil, never use any heavier than 10W30W, heavy oil viscosity's cause slow circulation through the oil passages and starve the engine's bearings for oil.

May 17, 2012 | 2002 Dodge Durango

1 Answer

97 honda accord knocking and grinding noise in front end


i have a 1997 honda accord ex. i have a knocking noise in the front end up to 25mph and goes away until you hit about 55mph then it comes back but it also goes away with the slightest turn of the steering wheel. what could this be? please help me, i been stuck on this for 5 days now. thanks.

Apr 17, 2012 | Cars & Trucks

1 Answer

NOISE WHEN COLD THEN GOES AWAY WHEN WARMS UP,SOMEONE SAID MAIN BEARINGS GOING BAD


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.

Jun 14, 2011 | 1994 Pontiac Grand Prix

1 Answer

Engine makes a knocking noise when started it last about 10 minutes then goes away it is a 3.0 engine


Sounds like thick oil in cold climate. Alot of synthetics do thisnbut shouldn't last 10 minutes. When was last oil change?

Jan 04, 2011 | 1992 Ford Taurus

3 Answers

2003 trailblazer makes winding noise when i accelerate.


it has to do with the clutch on the cooling fan. I have had to have mine fixed at about 50 k and it is acting up again at 87k. This tends to go away on mine as the engine heats up.

Aug 12, 2009 | 2002 Chevrolet TrailBlazer

Not finding what you are looking for?
Cars & Trucks Logo

405 people viewed this question

Ask a Question

Usually answered in minutes!

Top Lexus Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

ROBERT GARCIA
ROBERT GARCIA

Level 3 Expert

907 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

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

Answer questions

Manuals & User Guides

Loading...