engine squeal
Moderators: hot66, impmad2000, Nige
engine squeal
I've had a squeal coming from the engine for a while. it's usually at low revs or when accelerating from stand still.
I thought (hoped) it was the alternator belt but it isn't.
It sounds like dry metal on metal. The only thing i can think of is piston rings scraping.
I don't have loss of power or much sludge in the gauze when changing oil.
Any things i could be missing as it being a likely cause?
I have a video but no idea how to post it.
I thought (hoped) it was the alternator belt but it isn't.
It sounds like dry metal on metal. The only thing i can think of is piston rings scraping.
I don't have loss of power or much sludge in the gauze when changing oil.
Any things i could be missing as it being a likely cause?
I have a video but no idea how to post it.
1974 Porsche 914
Re: engine squeal
have you checked the fan isnt catching on the housing ?
James
1973 911 2.4S
1993 964 C2
2010 987 Spyder
1973 MGB Roadster
Its not how fast you go, but how you go fast
1973 911 2.4S
1993 964 C2
2010 987 Spyder
1973 MGB Roadster
Its not how fast you go, but how you go fast
Re: engine squeal
I've ruled out the fan rubbing. not a single mark on it or the case.
1974 Porsche 914
Re: engine squeal
It’s usually the simple things . Have you tried driving with the fan belt removed ? ( only a short drive of course )
James
1973 911 2.4S
1993 964 C2
2010 987 Spyder
1973 MGB Roadster
Its not how fast you go, but how you go fast
1973 911 2.4S
1993 964 C2
2010 987 Spyder
1973 MGB Roadster
Its not how fast you go, but how you go fast
-
- I need to get out more!
- Posts: 3302
- Joined: Fri Nov 14, 2003 8:31 am
- Location: Leicester, a convenient mid point !
- Contact:
Re: engine squeal
I don’t want to jump to doom and gloom stories but our Boxster did squeal (for a short while) after the seized bearing shell started to spin in the journal. Also got told a similar story on a 911 engine I bought that turned out to have a very similar spun bearing shell.
Drop the oil and and check for metal flakes, or send an oil sample off for analysis if you suspect this may be the case.
Shortly after the squeal phase the death knock was clear to all (Boxster)
I’m hoping I’m wrong ….
Drop the oil and and check for metal flakes, or send an oil sample off for analysis if you suspect this may be the case.
Shortly after the squeal phase the death knock was clear to all (Boxster)
I’m hoping I’m wrong ….
Tim Bennett
RHD Targa 2.2T EFI, Triumph ITB's, EDIS and Megasquirt.
"Old enough to know what's right and young enough not to choose it"
#1153
RHD Targa 2.2T EFI, Triumph ITB's, EDIS and Megasquirt.
"Old enough to know what's right and young enough not to choose it"
#1153
- PeterK
- DDK rules my life!
- Posts: 1070
- Joined: Mon Sep 01, 2014 3:04 pm
- Location: GU51 - Fleet, Hampshire, UK
Re: engine squeal
Are you sure it’s engine ?. Will it make the noise when stationary ?
'79 Targa - restoration now mainly complete & being driven
viewtopic.php?f=28&t=59756
viewtopic.php?f=28&t=59756
-
- DDK 1st, 2nd and 3rd for me!
- Posts: 2059
- Joined: Thu Jul 08, 2021 8:18 am
- Location: Lichfield
Re: engine squeal
Does noise change with clutch pedal?
Sent from my SM-G988B using Tapatalk
Sent from my SM-G988B using Tapatalk
1970 911T, Signal orange (Restoration thread)
1988 3.2 Carrera backdate, Black
2001 996 Turbo, Lapis blue (am I allowed to put that here?)
I'm looking for a pre-impact bumper 911S or other high-revving 911 to restore - please let me know if you see one.
1988 3.2 Carrera backdate, Black
2001 996 Turbo, Lapis blue (am I allowed to put that here?)
I'm looking for a pre-impact bumper 911S or other high-revving 911 to restore - please let me know if you see one.
Re: engine squeal
Today I'll be stripping down the side of 1 & 2. to inspect the barrells.
All sorts of attempts to find the noise have failed. i'm hoping it's a barrell / piston issue. if not i think it will be a main bearing.
All sorts of attempts to find the noise have failed. i'm hoping it's a barrell / piston issue. if not i think it will be a main bearing.
1974 Porsche 914
Re: engine squeal
I took off the head and barrels from side 1 & 2. The bores are silky smooth with lots of vertical lines. not scratches. the rings have done less than 5000 miles.
1974 Porsche 914
-
- Nurse, I think I need some assistance
- Posts: 7772
- Joined: Mon Apr 16, 2012 4:31 pm
Re: engine squeal
5000 miles only? What has caused that?
Sent from my 22011119UY using Tapatalk
Sent from my 22011119UY using Tapatalk
“A REMINDER. I would be grateful if those members who have borrowed bits from me in emergencies (e.g starter motor, oil cooler, etc) would return them and/or contact me”. – Chris Turner RIP
-
- Nurse, I think I need some assistance
- Posts: 8771
- Joined: Sat Apr 23, 2005 9:08 pm
- Location: Nottingham, UK
Re: engine squeal
Rings snapped during installation?
The simple things you see are all complicated
I look pretty young but I'm just backdated yeah
I look pretty young but I'm just backdated yeah
- KS
- Nurse, I think I need some assistance
- Posts: 14956
- Joined: Fri May 07, 2004 3:12 pm
- Location: Cornwall
Re: engine squeal
Can you take a photo? 'Silky smooth' with 'lots of vertical lines' is intriguing. What do the piston skirts look like?
Have you fitted the oil control rings correctly? Depending on the design, if the ends are not correctly overlapped then the oil rings can press too tightly against the cylinder walls, removing lubricant and allowing them to run dry.
Have you fitted the oil control rings correctly? Depending on the design, if the ends are not correctly overlapped then the oil rings can press too tightly against the cylinder walls, removing lubricant and allowing them to run dry.