Internal Combustion Engine. Most engines in road going vehicles are 4-cycle internal combustion gasoline engines.

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4
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2answers
11k views

What is a rod knock?

What is a rod knock? What causes a rod knock, how bad is a knocking rod, and how can I tell if a rod is knocking?
1
vote
3answers
106 views

Timing belt changed, won't start

I just did the timing belt change in a Honda 2007 V6 Accord. I thought I aligned the belt, but I guess I didn't. Now it won't cranks but won't start. How do I fix the timing issue? mark on Crank is ...
1
vote
1answer
127 views

2007 chevy cobalt reduced engine power

I have a 2007 Chevy cobalt that shows a reduced engine power error. The problem is sporadic sometimes it will run like a sewing machine and other days it will show the error and shake like it is about ...
4
votes
1answer
34 views

Oil pressure low on an 84 Ranger

I've recently changed the oil and filter on my 84 Ranger 2.8L V6. I used 10w-30 dino oil and filled it in range on the dip stick. I noticed that after I changed the oil, the oil pressure gauge (on ...
2
votes
2answers
68 views

Ticking in the engine

there was a ticking sound coming from my boyfriends truck Tuesday...once he had driven it for a little while the noise stopped...I asked him to check the oil and when he did, it was close to dry. We ...
7
votes
1answer
140 views

Car can't start after rocker gasket change

I have a 2008 BMW 120d LCI with N47 engine. Recently was diagnosed with some oil leak on the rocker gasket near the injector area. Were advised to change the rocker gasket seals. So I did change the ...
2
votes
1answer
114 views

2000 mustang v6 engine swap?

Im planning on putting a short block v8 motor into my mustang. The problem I am facing right now is knowing how much torque and horsepower my transmission (4R70W) can stand. The junk yard sells motors ...
3
votes
1answer
223 views

How do the bore and stroke affect the characteristics of an engine?

How do the lengths of the bore and stroke affect the performance (power and torque), and general running characteristics (e.g. redline, noise etc) of a 4 cylinder engine? Note: When asking this ...
7
votes
2answers
289 views

Why do engines run badly below the normal idle speed?

When the engine speed in my petrol car drops below about 650-700 RPM - the normal idle speed - it starts to shake and judder. This could be because say, I didn't give enough gas when pulling away. ...
6
votes
3answers
500 views

After Replacing EGR valve and tube: repeat of code P0401 for 98 Accord V6

About 13 months and 7500 miles ago, my mechanic replaced the EGR Valve and Tube and cleaned the intake to solve the low airflow problem. Now I'm again getting an insufficient flow warning with my ...
5
votes
1answer
96 views

Honda Shadow VT750 louder exhaust noise, low power

Recently, my motorcycle got smashed by my girlfriend (who was driving behind me) in the rear. As a result of the impact, I got propelled into the rear of the car in front of me. Both fenders are ...
4
votes
0answers
141 views

My BMW X5 won't stay running

Hello I have a 2003 BMW X5. I just got the engine replace a couple days ago. I went to pick it up but because the shop was done installing the motor but now I have to deal with the other problems I ...
1
vote
2answers
147 views

Which Engine is more powerful?

Engine A Specifications: Displacement: 1198 CC Max Power (bhp @ rpm): 87 @ 6000 Max Torque (Nm @ rpm): 110 @ 4800 Engine B Specifications: Displacement: 1197 CC Max Power (bhp @ rpm): 82 @ 6000 ...
9
votes
1answer
6k views

Does stalling damage my car?

I sometimes stall my car, as I have a new one and the biting point is so high. Anyway, someone told me stalling damages my car, but all it does is force the engine to a stop... Does constant ...
3
votes
2answers
149 views

What are the implications of driving through flood water when I have a high air intake?

My 2003 Opel Agila 1.2 Petrol, has a high air intake. Here is the approximate location of it: [ Here is the engine bay, showing the air intake on the left. Is the height of the bottom of the ...
1
vote
1answer
159 views

2000 Toyota Celica GT stalls with acceleration few minutes after starting

I have a 2000 Toyota Celica with about 180k miles. When my car has been off for a few hours and I try to start it up, if I try to press on the gas (either in drive, reverse, or park) within a few ...
5
votes
1answer
72 views

Engine oil found in the radiator - how did it get there?

What could be the possible cause of oil leaking into the radiator when the engine is running? I have changed the O-rings on the oil cooler and pressure tested the cooler.
2
votes
0answers
73 views

Changing Freeze Plugs on a Mazda 626

On a 98 Mazda 626 4 cylinder 2L engine where are the freeze plugs and how hard is it to replace them?
7
votes
2answers
305 views

How do modern engines differ than older ones

Modern engines produce more horsepower with more fuel economy but with the same procedure of burning the fuel air mixture and moving the piston, but the old ones and new ones are both four cylinders ...
2
votes
3answers
100 views

Needle Going Wild in Engine Vacuum Test

My '96 Saab 900S has multiple symptoms, and I suspect multiple problems. For one thing, it gets the error code: P0422 Main Catalyst Efficiency Below Threshold (Bank 1) I made a video of my vacuum ...
3
votes
1answer
603 views

How often to start/drive a vehicle to keep it healthy?

In order to keep a gasoline-powered vehicle healthy, how often does it need to be started or driven? Please specify if it actually needs to be driven, or if just starting it and letting it run is ...
0
votes
3answers
77 views

Do I have battery or engine problems?

Yesterday, I used my car to drive literally 2mins. Away from my dorm building to get to my class building and back because of bad weather. 30+mins. Later I come back outside and use my remote to ...
4
votes
0answers
185 views

Engine Running Fast in Park

Never had this issue before but I just started my vehicle and the tac automatically revved up to 1500 rpm when I cranked it. It didn't go back down while in park, it basically idled at about 500 rmp ...
4
votes
1answer
106 views

Why is lugging hard on connecting rods?

I was researching the effects of lugging and came upon this thread, one of whose answers claims that lugging is really hard on the connecting rods. but without explaining why. Can you explain ...
4
votes
2answers
318 views

What damages may I have caused draining oil by filter?

My ATV oil drain plug is an allen 6mm bolt. The bolt was all rusty, and what I expected to happen happened - I stripped it. Instead of wasting times trying to remove the stripped bolt I drained oil ...
1
vote
2answers
134 views

MG Rover Immobiliser removal

I have a 2003 MG Rover Streetwise, I need to remove or at least completely bypass the OEM Immobiliser. Driver door lock is broken due to attempted theft, so no point trying to enter the code, the key ...
2
votes
2answers
654 views

Why use a 12-cylinder engine over a 8-cylinder engine

When I look at Lamborghini Veneno and compare it for example to the Ferrari 458 Italia I can see that Lamborghini used a V12 while Ferrari placed a V8 inside the 458 Italia. I wonder why Lamborghini ...
3
votes
1answer
140 views

Inconsistent warm engine tick sound in 2013 F-150

I'm the original owner of a 2013 Ford F-150 XLT 3.7 which now has 30,000 km. After the last oil change, the engine is making an inconsistent tick sound when warm and also vibrates a little. The ...
3
votes
3answers
140 views

After five years in garage diesel car wouldn't start, what should be done?

One of my friends left his car in the garage since five years back and he has lived abroad since then. He left it with a full tank(its a diesel), and it ran perfectly well back then. Now he's back and ...
4
votes
2answers
567 views

Parking a motorcycle with hot engine

I have a question regarding my motorcycle (Yamaha FZ8 - 4Zylinder 800cc). At the weeksend I was driving through a town. It was very hot outside and I parked the bike. The coolingwater-temperature was ...
2
votes
1answer
104 views

Milky Oil in the radiator - Mazda 323

My vehicle has oil in the radiator and I have checked the head gasket matter fact I replaced it with a new one and there still is oil In the radiator may I ask what could be another reason for oil to ...
3
votes
2answers
119 views

How Much Liquid Can I Put In My Cylinders Safely?

I wanted to do a little bit of a "scientific" test to see how well a homebrew seafoam type mixture will dissolve carbon deposits on the cylinder crowns. I thought of simply taking the plugs out and ...
5
votes
2answers
562 views

Reboring a cylinder: compression ratio of new piston

I'm going to have the cylinder of my 2004 TT600RE motorcycle rebored (because it's damaged, not to increase power). The manual says the piston size is 95mm and the compression ratio is 8.5 : 1. I'm ...
2
votes
3answers
151 views

Popping Sound when A/C is on - 2009 Kia Rio

I've noticed that, when I first start my car, there is an intermittent popping or clicking sound coming from up near the engine (sometimes it almost sounds like a very quick burst of air escaping a ...
4
votes
2answers
899 views

Effects of Dirty Piston Heads and Intake Valves

What are the effects of dirty ( allot of carbon build-up ) piston heads and intake valves? I just used an endoscope to take a look at my piston heads while changing my spark plugs and the heads had ...
5
votes
2answers
91 views

Machine turns off randomly and won't start after staying off for a while

It all started about a year ago. I had to go to another city and the drive was about an hour long, it went perfectly fine. I left the car parked on the sun for about 2 hours, nothing special, on a ...
4
votes
0answers
170 views

How to remove engine cooling fan from a W169 Mercedes A-Class

How do you remove engine cooling fan from A-Class Mercedes W169?
2
votes
2answers
81 views

Car wont turn over after trying to get it out of snow

I have a 1998 Mustang V6. Last winter I attempted to get it out of the snow on an inclined driveway. I revved it apparently too hard and the engine sputtered for a moment and stopped. Since then it ...
-1
votes
2answers
42 views

BMW 320d es auto engine size

I would like to know how to tell engine size of a BMW. I only buy cars a 1.9 litre or smaller engine.
3
votes
1answer
106 views

Shortblock vs Longblock

What is the difference between a shortblock and a longblock? Both terms are used to refer to the engine, but what's the difference between them?
6
votes
2answers
969 views

Do valves rotate over time?

As I was doing my valve servicing, one question came to mind: As valves undergo millions of cycles of reciprocating motion, do they actually rotate or is their position relative to the seal fixed? Or ...
1
vote
2answers
315 views

Dodge Stratus 2000 shaking at idle after timing belt replacement

I have a Dodge Stratus 2000 SE 2.4 L with 150,000 miles on it. I decided to change the timing belt and water pump, since my mechanic told me to do so because of the mileage it had on it. Anyways, I ...
5
votes
2answers
166 views

Water leaking into frame case/engine?

I just had my 2012 Mini Cooper S (66K miles) repaired last week last week for a failed/leaky water pump. My car had an episode where it overheated and shut down and wouldn't start after pulling over ...
6
votes
2answers
926 views

Why would I paint my car engine?

I've been watching Pete's Garage on YouTube and the guy is absolutely amazing and very enlightening on the subject. He has at least one video on engine painting but he mentions it in a number of ...
4
votes
0answers
87 views

2009 Kia Rio - Potential Misfiring?

I have a 2009 Kia Rio with ~75,000 miles. After I first start the car and accelerate away from where it was parked (especially if I accelerate hard), the car will repeatedly make a quick sound that ...
1
vote
2answers
255 views

Car won't start, dies after jump

I have a 2007 Ford Mustang, 6 cylinder. A few hours after I drove it, the battery was completely dead. It can start with a jump, but if left to idle the engine stops soon after the cables are removed. ...
1
vote
1answer
84 views

Are valve guides normally reusable?

A valve assembly diagram from my Tacoma FSM designates valve guides as non-reusable. I was wondering if that is just a CYA or really the case.
5
votes
1answer
365 views

Minor grinding noise and vibration when car is idle

I have a 2005 stick shift Toyota Camry. Sometimes when I am at a red light or stop sign and the car is in neutral I feel a slight vibration from the pedals and a slight grinding noise coming from the ...
2
votes
2answers
325 views

Engine jerking and revving, multiple failed ignition coils

This problem started a month ago. My Aveo started revving and jerking when it was sitting at a light on my way home (2 blocks from my house) and the engine light came on. I drove it home. The next ...
7
votes
3answers
4k views

Effects of leaky exhaust valves

While rebuilding my valves, I noticed that 4 out of 6 exhaust valves on one side of the V6 engine were leaking after lapping and I had to relap them. I determined that by doing a water test. I am ...