Recent Topics
1971 VW bus. No hose clamps on fuel filter. Fire
by wrcsixeight
04/27/18 01:41 AM
Toyota's Insistence on using ATF in power steering
by alcyon
04/27/18 01:04 AM
200 Mobil Gas Stations coming to Canada
by Snagglefoot
04/26/18 10:13 PM
Brake Pads 2003 Jetta 1.8
by maxdustington
04/26/18 09:56 PM
Any low cal high mag high zinc 5w40's out there?
by Roland1
04/26/18 09:17 PM
straight-weight 20 oil
by OilUzer
04/26/18 08:38 PM
supertech 15W40 5.3 Chevy
by mobilaltima
04/26/18 08:38 PM
Tokyo Roki 15208AA130 - 4708km
by VolkswagenFox21
04/26/18 08:37 PM
Shell Helix Ultra 0W40, 3070Km, Fiat Barchetta
by Popsy
04/26/18 07:39 PM
Marijuana on the left coast
by Snagglefoot
04/26/18 07:24 PM
Ubuntu 18.04 LTS and derivatives are out!
by uc50ic4more
04/26/18 07:21 PM
Cooper CS5'
by gabriel9766
04/26/18 07:07 PM
Zero Turn Front Tires
by AirgunSavant
04/26/18 06:50 PM
$1,000 in rewards/cash back from Chase Bank
by 04SE
04/26/18 06:15 PM
My Life with a Nurse:
by MolaKule
04/26/18 04:32 PM
No start string trimmer
by Whimsey
04/26/18 04:08 PM
HOME REMEDIES Zinc Oxide Folk Remedy- funny
by CourierDriver
04/26/18 01:39 PM
Additive Chemistry Components III
by MolaKule
04/26/18 12:33 PM
Explosion at refinery in Superior, WI.
by john_pifer
04/26/18 12:08 PM
F1 - 2018 Azerbaijan Grand Prix
by gofast182
04/26/18 11:56 AM
Newest Members
Rafaelon, kylek162, Budd33, Jekyll, Superfede
64860 Registered Users
Who's Online
21 registered (alcyon, 1WildPig, Bumpstick, FordCapriDriver, Brad_C, edyvw, 2 invisible), 847 Guests and 72 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
64860 Members
68 Forums
282418 Topics
4715135 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Page 1 of 2 1 2 >
Topic Options
#4635906 - 01/15/18 03:55 PM Engine knock
Nissan101 Offline


Registered: 08/13/15
Posts: 412
Loc: Caribbean
Good day,
At idle there is no knocking, at high rpms there are none,
But say 4500 rpm there is a "knocking sound",
You all think engine the engine is bad, or am i lucky and its one of the pulley bearing?

And the knocking noise can only be heard for the split second as I let my food of the throttle.

Please tell me it could be a pulley. :-(
ONly recently this engine was installed and now this.
Oil was changed recently with a store brand 20w50.
I used valvoline maxlife before.


Edited by Nissan101 (01/15/18 03:57 PM)
_________________________
Nissan N16 -10w30
Nissan S13 -20w50

Royal Purple HPS smile

Top
#4635920 - 01/15/18 04:08 PM Re: Engine knock [Re: Nissan101]
JustN89 Offline


Registered: 06/27/17
Posts: 321
Loc: DFW
I believe you posted something earier about this, and there was a recommendation given that you change out the store brand oil with a brand you've successfully used before. Valvoline Maxlife or the Royal Purple in your signature would be fine. Use a filter that you've used before as well. That will either solve your problem or we can remove those variables from the equation and start looking at other possibilities.

Top
#4635921 - 01/15/18 04:09 PM Re: Engine knock [Re: Nissan101]
Audios Offline


Registered: 11/19/11
Posts: 807
Loc: Lyndhurst NJ
Sometimes theres a loud rattling noise from worn spring tension belt tensioners in between shifts, as you let off the gas, but its hard to say without hearing it.
_________________________
2002 VW Golf TDI-Mobil 1 5/40 TDT
2005 BMW M3 BMW Twin Power 10/60
1997 John Deere Gator 4x2
2007 Mercedes GL320 CDI Fuchs 5/40 GT Pro XTL

Top
#4635922 - 01/15/18 04:10 PM Re: Engine knock [Re: JustN89]
Nissan101 Offline


Registered: 08/13/15
Posts: 412
Loc: Caribbean
Yes i posted before,
I will change out the oil and filter tomorrow. Hopefully this fixes it.
This is my main daily now as the other car got sold, and i have to pay for University. So money tight :-(
_________________________
Nissan N16 -10w30
Nissan S13 -20w50

Royal Purple HPS smile

Top
#4635923 - 01/15/18 04:13 PM Re: Engine knock [Re: Nissan101]
Nissan101 Offline


Registered: 08/13/15
Posts: 412
Loc: Caribbean
But question for mechanically incline people
If my engine had a mechanical failure, wouldn't it be knocking 24/7?
and my car has full power and no smoke.
_________________________
Nissan N16 -10w30
Nissan S13 -20w50

Royal Purple HPS smile

Top
#4635938 - 01/15/18 04:38 PM Re: Engine knock [Re: Nissan101]
ammolab Offline


Registered: 01/16/06
Posts: 957
Loc: Ruidoso, NM USA
"Letting off the throttle" knock does not sound like serious internal engine problems. Maybe a vibration from a pulley, bad engine or transmission mount, loose exhaust component etc.
_________________________
2009 Honda CR-V
2011 BMW R1200R
2005 Kaw Ninja 250
1994 Jeep Wrangler 2.5L
2016 Chevy SS Sport Sedan

Top
#4635940 - 01/15/18 04:44 PM Re: Engine knock [Re: Nissan101]
bullwinkle Offline


Registered: 10/09/04
Posts: 7486
Loc: Cincinnati, OH, USA
What happens if you hold the throttle steady, in neutral, at a fairly high RPM (3500-4000)-do you hear any knocking then? Is it better when cold (just warmed up) & only loud when the oil is hot? Usually when I have had loose/worn rod bearings they're a LOT worse with hot oil. If it has a bad rod bearing(s), 20W50 may not be thick enough!
_________________________
06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 15 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)

Top
#4635948 - 01/15/18 04:52 PM Re: Engine knock [Re: Nissan101]
demarpaint Offline


Registered: 07/03/05
Posts: 29408
Loc: NY
It could be a lot of things, tough to diagnose w/o seeing and hearing it. I had a noise in an old Ford van once, it sounded just a like an engine knock. I disconnected all the fan belts and ran the engine briefly and there was no knock. Then one accessory pulley at a time starting with the water pump I moved the pulleys from side to side to check for play and spun them to check for odd noises. I found the air pump was knocking. Years later I had the same noise in my 88 E-150, it was the air pump again. It could be an accessory or damper pulley in your case.
_________________________
God Bless Our Troops


Top
#4635975 - 01/15/18 05:20 PM Re: Engine knock [Re: demarpaint]
Nissan101 Offline


Registered: 08/13/15
Posts: 412
Loc: Caribbean
At max rpm (6200) no knocking,
only at the point of letting go of the throttle.
_________________________
Nissan N16 -10w30
Nissan S13 -20w50

Royal Purple HPS smile

Top
#4635978 - 01/15/18 05:20 PM Re: Engine knock [Re: Nissan101]
Nissan101 Offline


Registered: 08/13/15
Posts: 412
Loc: Caribbean
Does not make a difference, it is the same when hot and cold
_________________________
Nissan N16 -10w30
Nissan S13 -20w50

Royal Purple HPS smile

Top
#4636089 - 01/15/18 07:13 PM Re: Engine knock [Re: Nissan101]
TinyVoices Offline


Registered: 09/12/16
Posts: 465
Loc: Vienna, VA
What motor in your s13? KA?
_________________________
1993 Toyota MR2 Hardtop N/A - 157k miles - Valvoline Max Life 5w30
2006 Toyota Matrix XR AWD (Fiancee) - 126k miles - Valvoline Max Life 5w30

Top
#4636193 - 01/15/18 09:05 PM Re: Engine knock [Re: Nissan101]
FermeLaPorte Offline


Registered: 07/25/17
Posts: 430
Loc: Texas (south)
Take it to a mechanic, don't lose time asking strangers on the internet
_________________________
Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.

Top
#4636259 - 01/15/18 11:26 PM Re: Engine knock [Re: Nissan101]
Linctex Offline


Registered: 12/31/16
Posts: 5731
Loc: Waco, TX
Originally Posted By: Nissan101

And the knocking noise can only be heard for the split second as I let my food of the throttle.


It is a broken piston skirt.
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

Top
#4636334 - 01/16/18 06:19 AM Re: Engine knock [Re: Linctex]
Driz Offline


Registered: 09/23/07
Posts: 252
Loc: northern NY
You can get a decent mechanics stethoscope at Autozone for $8 and a really good one amazon foe $20. Get one , itíll open up a whole new world for you. Forget that long extension [censored] too. Once you have one you will use it again.
That will normally let you zero right in on where the noise is coming from by the process of elimination. As always while working on a running engine to tuck in long hair and long floppy clothes especially sleeves. Remember that fan comes on when it decides to so stay outa there always. Good luck

Top
#4636336 - 01/16/18 06:24 AM Re: Engine knock [Re: Nissan101]
Trav Offline


Registered: 11/20/06
Posts: 18272
Loc: MA, Mittelfranken.de
I cant even venture a guess but I would start by having someone operate the throttle while I listened under the hood to at least determine if it was an internal engine noise or external.
As you just put the engine in it could be a host of things from an exhaust hitting something, engine mount damage or a mounting bracket.
_________________________
ASE L1, Master. Deutsch Meisterbrief.

Top
Page 1 of 2 1 2 >