Cold start idle noise
Thread Starter
|
Junior Member
Joined: Jan 2018
Posts: 13
Likes: 5
From: Landenberg, PA
Cold start idle noise
Hi,
I have a 98 XK8 convertible 4.0 that has been sitting over the winter. I started it once a month over the season but now am getting it ready for spring. When I started it last I hear a click multiple times like a solenoid engaging, there is a squeal following the click like belt noise which then stops before trying again. It sounds like a solenoid trying to engage an accessory (no supercharger). If I watch the belt tensioner I see it jump/move slightly at the clicking sound. Before I take off the belt and troubleshoot , thought I would post it here for insight. I looked through the forums and didn't see anything quite like what I am seeing. Saw enough to scare me though about the timing belt chatter......
thanks
Jon
I have a 98 XK8 convertible 4.0 that has been sitting over the winter. I started it once a month over the season but now am getting it ready for spring. When I started it last I hear a click multiple times like a solenoid engaging, there is a squeal following the click like belt noise which then stops before trying again. It sounds like a solenoid trying to engage an accessory (no supercharger). If I watch the belt tensioner I see it jump/move slightly at the clicking sound. Before I take off the belt and troubleshoot , thought I would post it here for insight. I looked through the forums and didn't see anything quite like what I am seeing. Saw enough to scare me though about the timing belt chatter......
thanks
Jon
Veteran Member
Joined: Apr 2014
Posts: 5,457
Likes: 1,816
From: New Jersey USA
Jon, some clicking noise is normal, but when I read this and saw the year I should ask: have the checked or changed the belts idle pulley? You be surprised at the noises it can make when the bearings are bad (common occurrences?
How to test? Loosen belt, turn pulley by hand. Good pulley is very smooth. Mine felt like a ratchet wrench when it went bad.
John
How to test? Loosen belt, turn pulley by hand. Good pulley is very smooth. Mine felt like a ratchet wrench when it went bad.
John
Veteran Member
Joined: Jan 2019
Posts: 1,907
Likes: 1,427
From: Bahrain
Check pulley tensioners first
Your post didn’t mention if the sound is continuous or dies down when the car has warmed up. The belt tensioner pulley would move as things warm up but it should be smooth without noise.
With the serpentine belt off, the tensioner and idle pullies should spin freely without noise so then I would move onto checking VVT solenoids
With the serpentine belt off, the tensioner and idle pullies should spin freely without noise so then I would move onto checking VVT solenoids
Thread Starter
|
Junior Member
Joined: Jan 2018
Posts: 13
Likes: 5
From: Landenberg, PA
Hi Johnken,
thanks for the quick response. Just this fall I replaced the pulleys on the idler and the tensioner and replaced belt. I used Dayco for the belt and idler and a jaguar part for the tensioner pulley. The old one actually shredded itself into a melted plastic blob. They should be good, but I will pull the belt and spin each to confirm.
thanks for the quick response. Just this fall I replaced the pulleys on the idler and the tensioner and replaced belt. I used Dayco for the belt and idler and a jaguar part for the tensioner pulley. The old one actually shredded itself into a melted plastic blob. They should be good, but I will pull the belt and spin each to confirm.
Veteran Member
Joined: Apr 2014
Posts: 4,793
Likes: 3,008
From: Jersey, Channel Islands
Jon,
Take a look at this thread by stu46h - the symptoms sound similar:
https://www.jaguarforums.com/forum/x...9/#post2014748
Take a look at this thread by stu46h - the symptoms sound similar:
https://www.jaguarforums.com/forum/x...9/#post2014748
Thread
Thread Starter
Forum
Replies
Last Post
chater210
XK / XKR ( X150 )
5
Feb 12, 2014 11:44 AM
BrightonRay
XJ6 & XJ12 Series I, II & III
1
Oct 7, 2009 09:37 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)