Questions tagged [knock]

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3 answers
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Knocking valve sound after gasket replacement

I changed the intake gaskets top and bottom along with valve cover gaskets on my Ford F-150. After I finished it was hard getting started but I finally got it started and now it sounds like the valves ...
Tony Brown's user avatar
3 votes
3 answers
1k views

Knocking under load on first gear

I have this issue.. I already asked on FordOwnersClub, but I feel like here I might have a better chance to sort it out. I bought a Ford Focus mk3 2011 with 1.6 ecoboost 134kW engine with 90k km. My ...
h00ki's user avatar
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3 votes
0 answers
3k views

What else should be changed if I already have the oil pan off for cleaning?

I have a 2005 Chevy Suburban 1500 4WD 5.3L with 187000+ miles. It has a really bad tapping/knocking sound. I think this is the infamous lifter knock, and was caused by infrequent oil changes and ...
Nathan DeWitt's user avatar
3 votes
0 answers
1k views

Engine knocks and engine speed falls below idle upon releasing the throttle

I have this strange problem on my 1999 Volvo V40 1.9T T4 (B4194T engine, no VVT, ~150k miles), I'll try to provide a detailed description. I noticed that only when the engine is warm, whenever I ...
I have no idea what I'm doing's user avatar
2 votes
0 answers
43 views

Renault Clio 2007 1.2i ticking sound at one accelerator position

I have a Renault Clio 1.2i and the engine (I guess) makes a ticking sound only when accelerator is slightly pressed down (usually the location where I'd like to keep my speed and not accelerate), if I ...
Larry's user avatar
  • 21
2 votes
0 answers
628 views

knocking noise sounds like its coming from under my feet!

I have an 03 chevy cavalier. While out driving yesterday it started to make a loud knocking noise. It sounded like it was coming from under drivers feet area. It also got louder with acceleration. Not ...
Cat Lady's user avatar
2 votes
0 answers
133 views

Diagnosing Engine Knock

My 2003 Volvo XC70 had a slight engine knock for about 5000 miles but never showed any signs of damage to the engine. Oil was fine and it only made the sound in around the 2500-3500 rpm range. One ...
Dylan Ireland's user avatar
2 votes
0 answers
1k views

Engine knock when engine is hot

I have an 05 Mazda MPV V6 engine. When it starts up there is no noise and everything is fine. After engine is hot I get a knocking sound and the oil pressure light comes on. By looking at earlier post ...
Crazchris's user avatar
2 votes
0 answers
266 views

Engine knock due to contaminated cylinder, is there a way to purge? 1998 Ford F-150 4.6L

I am an apprentice for a small shop and we recently replaced a 4.6L engine on a 1998 F-150 due to knocking problems (important). The engine we swapped it for was presumably in good running condition, ...
AlanZ2223's user avatar
  • 121
2 votes
0 answers
141 views

Possible engine knock in 1995 GMC Jimmy

Hello I have a 1995 GMC Jimmy (Automatic & 4x4)and I have been working on it on and off for about a year and a half, i have fixed many things with it but there are couple things that I have not ...
Dylan Wisdom's user avatar
1 vote
0 answers
3k views

Can knocking noises caused by anti roll drop links be intermittent or just not detectable until they get worse?

So I was getting a knocking noise from under car and mechanic 1(who just had axle stands i.e. no ramp) said its either the anti roll bar or ball joint and there was no way of knowing which you just ...
James Wilson's user avatar
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0 votes
0 answers
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Strange noise only when accelerating in Peugeot 301

A variant of Peugeot 301 with naturally aspirated engine and DAE 6 speed AT. only if the car has warmed and only when accelerating, there is a knocking noise frequency around 1Hz at 60kph and ...
hosm's user avatar
  • 1
-2 votes
1 answer
315 views

What are the possible reasons for an Engine Knock?

I have a Perodua Viva Elite (2011 MT). Several months back my vehicle engine started to knock and Engine Check Light started showing up while driving in traffic. So I went for an Injector replacement, ...
Roshana Pitigala's user avatar