Engine noise at startup!
#1
Lexus Champion
Thread Starter
Engine noise at startup!
Holy smokes!
I started my car yesterday for the first cold start that day. When the engine cranked over, it sounded like a jack hammer was going off in my engine bay! I freaked out and shut off the engine. I checked the engine bay for anything loose or broken. Nothing. It was clean. So I started it up again and the noise was still there but it quickly died down and stopped. I've been driving it normally and the sound hasn't returned. I have a feeling it might have been caused by the car being shut off during a cold start. I moved the car out of the driveway and into the garage. It was the first and only time I have shut off the car seconds after the engine came to life and the next start it makes this crazy noise!
Has anyone gone through something like this or know what I'm babbling on about?
I started my car yesterday for the first cold start that day. When the engine cranked over, it sounded like a jack hammer was going off in my engine bay! I freaked out and shut off the engine. I checked the engine bay for anything loose or broken. Nothing. It was clean. So I started it up again and the noise was still there but it quickly died down and stopped. I've been driving it normally and the sound hasn't returned. I have a feeling it might have been caused by the car being shut off during a cold start. I moved the car out of the driveway and into the garage. It was the first and only time I have shut off the car seconds after the engine came to life and the next start it makes this crazy noise!
Has anyone gone through something like this or know what I'm babbling on about?
#2
Driver School Candidate
Join Date: Sep 2013
Location: Alberta
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
Hey Nabbun: after five decades of driving experience with many, many different vehicles, all owned and driven during very harsh conditions in the Canadian North (as well as our nice, brief summers), my first thought would be oil starvation in the upper portions of the valve train. The telling thing about your description is the initial racket and then how the noise stopped. How long had it been sitting there without running? Have you checked your engine oil level lately? Are you on schedule for oil and filter changes, as well as overall system checkups? Good luck on determining the cause. Cheers / LexLeezard / 2008 GS460, brake disc and pad upgrade, no mods
#4
Lexus Champion
Thread Starter
Hey Nabbun: after five decades of driving experience with many, many different vehicles, all owned and driven during very harsh conditions in the Canadian North (as well as our nice, brief summers), my first thought would be oil starvation in the upper portions of the valve train. The telling thing about your description is the initial racket and then how the noise stopped. How long had it been sitting there without running? Have you checked your engine oil level lately? Are you on schedule for oil and filter changes, as well as overall system checkups? Good luck on determining the cause. Cheers / LexLeezard / 2008 GS460, brake disc and pad upgrade, no mods
#5
Lexus Champion
Thread Starter
It's a well documented issue with cold soak of the manifold, here is more information and discussion:
http://www.ct200hforum.com/forum/lex...ough-idle.html
http://www.ct200hforum.com/forum/lex...ough-idle.html
#6
This is my first winter with the CT. I've started the car at temperatures as low as -37C (thanks to the polar vortex) and only once did the engine made that racket. The noise is very disconcerting, but apparently no harm is done. It is a known issue with the 1.8L engine used in the CT and the Prius.
#7
Lexus Champion
Thread Starter
This is my first winter with the CT. I've started the car at temperatures as low as -37C (thanks to the polar vortex) and only once did the engine made that racket. The noise is very disconcerting, but apparently no harm is done. It is a known issue with the 1.8L engine used in the CT and the Prius.
Trending Topics
#8
Mine has done this 3 times to me. I took it to the dealer 2 days ago. The first start of the day after sitting overnight at the dealership it started normally. Later in the day the tech heard the noise but being alone could not isolate the source. Today they called and said in addition to the manifold service bulletin there is a similar noise bulletin relating to a bad rear engine mount.
They were not able to reproduce the noise again but they feel my noise is related to engine mount so one was ordered to be installed before returning my car to me. In the interim we're driving a brand new ES loaner.
JR
They were not able to reproduce the noise again but they feel my noise is related to engine mount so one was ordered to be installed before returning my car to me. In the interim we're driving a brand new ES loaner.
JR
Thread
Thread Starter
Forum
Replies
Last Post