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

learn more… | top users | synonyms

3
votes
1answer
610 views

Comparing v-twin with straight-four engines

This isn't really on-topic for "motor vehicle repair", but I figure it's kinda close. A few months ago, I bought a 1983 Honda Nighthawk 550, which has a straight-four engine. A friend of mine was ...
3
votes
2answers
2k views

What is the potential damage of a temporarily partially submerged front end?

I have a 2005 Nissan Sentra (base model, FWD, 1.8L 4-cyl engine) and I took some bad advice from the Maps app on my iPhone and I ended up driving on a very, very bad road. At one point, I drove into a ...
3
votes
2answers
2k views

2000 Nissan Maxima Service engine light

The dealer diagnosed it and says it got tripped by catalytic converter and rear oxygen sensor. The total estimate was around $2000. The blue book value on his car is around that amount. Is there a way ...
3
votes
1answer
63 views

Over heating of my 05 Honda Civic

I first purchased my Civic in Jan of 2015. My first car had terrible over heating problems so I decided to get rid of it for my civic. Turns out, my Civic has the SAME problem. I decided to take it ...
3
votes
1answer
50 views

Engine Temperature from OBD data

Engine Coolant temperature is obtained from OBD. But there is no PID to get engine temperature. Obviously, they are related, rather proportional I guess. But can there be a case where my engine is ...
3
votes
1answer
85 views

Top speed of my Bajaj Pulsar 135 is decreased after changing Clutch plate

I would like to know if my clutch plate can be the reason that my top speed is now lower. Top speed of my bike is 115. I drove my bike after the clutch plate replacement and the top speed is now 90- ...
3
votes
2answers
87 views

What would be better for an engine driving at 60mph or 70mph? I wish to get the most miles out of my engine?

At 60mph my engine revs at 2800RPM and at 70 it's 3200RPM. My qustion is which condition would give the most miles from my engine.
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 ...
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?
3
votes
1answer
242 views

VW Golf 2001 Mk4 Diesel ASR Engine Problem

I've spent a crazy amount of money on my car lately and I still have the same problem. I've replaced the: Catalyst Converter Radiator Starter Motor EGR Valve Track Rod ends & Wheel Bearings ...
3
votes
1answer
101 views

Valve lapping and lubrication

I have recently taken all my valves out and cleaned them with a wire brush as well as the shafts in the cylinder heads. I am now getting ready to put them back in and have several questions: What ...
3
votes
2answers
151 views

2006 Pontiac g6 rough idle and intermittent spongy brake and starting issue

I have a 2006 Pontiac G6 with 160k on the 3.5 motor. Around 155k the brake pedal went hard and spongy. Also, about 1 in every 40-50 times I start it cold, the starter will turn without a successful ...
3
votes
1answer
1k views

What is Opel/Vauxhall's TwinPort Technology?

Some Opel Engines come with something called TwinPort Technology. I guess that this increases power, as the original Z12XE (1.2) engine has 55kW, and the TwinPort (Z12XEP) version engine has 59kW of ...
3
votes
1answer
20 views

How does cylinder leakage tester kit work?

I was browsing Amazon in search for a combustion leak detector (AKA "block tester") and I stumbled upon a cylinder leakage tester kit, which is supposed to do similar things? But I am not quite sure ...
3
votes
1answer
957 views

Risks of “excess and lack” of Engine oil

I ride a Honda Stunner CBF 125 CC daily for approx 30 kms, with an average speed of 45 km/hr. I noticed that my motorcycle has been consuming too much engine oil like it not used to few years ago. ...
3
votes
1answer
437 views

Bottom piece of spark plug broke off in motorcycle engine

I was riding my 2005 RM125 dirt bike the other day when it bogged down all of a sudden. I noticed the spark plug had backed out of the head, thus causing the stall. I pulled the spark plug all the way ...
3
votes
4answers
2k views

RPM jumps up & back down at 40mph

My question is for a 2006 Dodge Magnum, 2.7 liter engine. Just over the past month or so, I noticed when I'm cruisung, just coming from a dead stop, when I'm at 40 mph my car kinda feels like it ...
3
votes
1answer
91 views

Jeep Grand Cherokee redlines after engine overhaul

I just replaced pistons, lifters, pushrods, and head on a 1999 Jeep Grand Cherokee. It started right up, but the RPM went to redline. I checked throttle body components, the linkages are OK, but the ...
3
votes
1answer
100 views

How are the engines of street cars different from trucks and performance cars?

Consider three cars. All three cars have different engines, but all engines are 3 lit. V6s. The engine in first car is made for great gas mileage. The engine in second car is made to be able to tow ...
3
votes
1answer
282 views

Different heads on Dodge Magnum 360

I'm working on a 98 Dodge Ram 2500 with a Magnum 360 V8 (roller cam shaft). It had a cracked head on one side, so I purchased a pair of remanned heads from an eBay retailer. These heads are the ...
3
votes
2answers
958 views

Is incessantly revving an engine necessary for tuning?

I have a neighbor who revs his engine loudly over and over again, for anywhere from 15 or 20 minutes up to several hours at a time, several days a week, and has been doing this for over a year. It ...
3
votes
2answers
2k views

2002 Renault Clio V6 won't start - just turns over

So I'm round my old dears and park on her drive. She needs to move my car (a 2002 Renault Clio V6 3.0) off the drive to get her car out. She gets in, reverses it and stalls it. Starts up again and she ...
3
votes
1answer
708 views

2000 Grand AM GT engine and electric cut out randomly while driving

My Grand Am is cutting off randomly while driving. I have not been able to purposely reproduce the problem, which makes diagnosis difficult. I am looking for any advice in diagnostics, or parts to ...
3
votes
1answer
1k views

1994 Ford Escort won't start

I have a 1994 Ford Escort that was bought used 2 years ago. When we bought it, it would barely run, and we had to replace the engine head. As a result of that and other repairs, it has been losing ...
3
votes
2answers
1k views

Motorcycle 125cc question about PISTON condition and battery

Last year I bought a 125cc bike, Modenas brand, most likely unknown to you. It is a moped. http://www.modenas.com.my/v2motorcycle.asp?id=70 It can go as fast as 110 km/h enough for the city, ...
3
votes
1answer
223 views

VW Passat B5 EPC Light on Dashboard

There is a yellow light on my dash that says 'EPC'. I have no idea what this could mean on my car as I haven't noticed any difference in the way it drives, nor are there any unusual sounds other than ...
3
votes
1answer
38 views

74 Corvette with slight pop in exhaust

I've got a (new to me) 1974 Corvette with the 5.7 / GM 350 . Dual exhaust. Driver's side exhaust sounds perfect. Passenger's side exhaust has a subtle pop/rattle to it and does not pass the "dollar ...
3
votes
1answer
45 views

What would go into a tranny swap on a modern vehicle

I have a 1999 Isuzu trooper and I have been toying with the idea of doing an engine and transmission swap on it. If all goes well with the engine I plan on getting I would like to replace the ...
3
votes
1answer
593 views

White smoke coming from hood in cold weather at a stop light? [2003 Ford Taurus SE, Vulcan Engine]

As winter approaches, I have been noticing that on some occasions in which it is relatively cold outside (20-30 degrees) ,and also early morning or night time when the temperature is low, that my car ...
3
votes
1answer
143 views

Replace 2003 Highlander engine w/Avalon or Camry?

I have a 2003 Toyota Highlander, 3.0L V6, FWD, mfr 12/02, with a blown engine. My local salvage yard sold me a 2002 Avalon engine that "is exactly the same except the intake manifold". I took the ...
3
votes
1answer
38 views

What Do I Use for a Thrust Plate After Double Roller Timing Chain Swap

History/Background of This Engine The Magnum 3.9 V6 was introduced in 1992. In 1997, a TSB was issued to fix excessive timing chain noise. The fix was to remove the cam thrust plate and chain oil ...
3
votes
1answer
73 views

If there is a vacuum leak, after you shut off engine, there should be no assisted braking immediately

Is this true or false? Without vacuum leak, the first few times you pump the brake, you can still get some of the vacuum assisted braking. I'm trying to diagnose suspected vacuum leak in this case.
3
votes
1answer
271 views

Is it better for car's longeviety in cold climate or hot climate

Leaving out performance aspect ( Since cold weather is best for that ) I want to know which is better to maintain a car and its longevity. My arguments for Hot weather: Engine reaches optimum ...
3
votes
1answer
285 views

Do Compression Rings and Oil Ring Wear at the Same Rate?

Is it possible that the oil control rings might be worn to the point that you're burning significant amounts of oil, but the compression rings still be good? Or do they typically wear out together ...
3
votes
1answer
51 views

Access to Piaggio MP3 engine

Some help needed here. I ride a Piaggio 250 mp3 scooter. After a few weeks of stalling at traffic lights, it finally refused to start engine at all. I've tried the garage but they didn't repair it ...
3
votes
1answer
536 views

Opel Corsa D engine issue?

I have a 2011 1.4 petrol Corsa D. When accelerating the car lurches. This doesn't happen all the time and is seemingly random. It may happen when I accelerate from 60 on the motorway back to 70 or 30 ...
3
votes
2answers
119 views

Engine stalling/not wanting to go

Hello so I have a 1988 chevy 1500 with a 350 in it. I drove it for about 10 minutes the other day no problem would spin the tires over easy also. The next day I drove it to my grandma's no problem. I ...
3
votes
1answer
102 views

Can you make a tapped hole deeper?

I tapped a hole in my motor (to hold the valve cover) but I don't think the pre-existing hole was deep enough. Can you make a tapped hole deeper? As the drill bit for the pilot hole should fit right ...
3
votes
1answer
469 views

Loose crankshaft bolt. Cause?

I usually service my Mitsubishi L200 Sportero 4x4 5FWD Diesel at Mechanic A, but I had not for several months. Needing a service, I tried another mechanic, Mechanic B, who did the usual 'tune-up'. Two ...
3
votes
1answer
64 views

Can the crank be removed from a 1999 beetle without engine removal

Spun the rod bearing. I dropped the oil pan and found the affected rod. I disconnected the rod. If I can remove it and have the journal turned or replace it, it would be more work but less money than ...
3
votes
1answer
989 views

What could make a noise when I decelerate with a manual gearbox?

Update 06/23/2014 One week later, this noise is now very, very loud, even when I don't decelerate. As soon as I put the 5th gear and clutch, it vibrates whether I accelerate or not. It's like if the ...
3
votes
2answers
1k views

What will happen if there is something else also with petrol in car

Today someone broke my car fuel outer case and taken out fuel. I came home by driving but then i have now one doubt in my mind. What if he put something else in tank like water, sand, etc in there. ...
3
votes
2answers
1k views

2013 Yamaha XT250 engine clicking/ticking noise

I just bought my xt250 as my first bike after getting my permit about a month ago. It's 2013. At 100 miles I dropped the oil and changed the filter. As a small woman I've also installed lower links to ...
3
votes
1answer
389 views

How often should spark plug wires be replaced?

I last replaced them with the plugs about 4 years/60-70k miles ago. I bought platinum plugs I if I remember correctly, so I still got some life on those. The car (2001 Buick Regal) is still in good ...
3
votes
1answer
181 views

Honda Accord 2004 V6 Australian, Can stopped in the middle of the road

Recently, when I was driving and had to stop at a set of light the car all of a sudden stopped. All the lights on the spedometer came up, but the A/C, radio all was working fine. I turned it off and ...
3
votes
1answer
2k views

Engine does not have enough power (and has limited RPM)

I have a 1982 Mercedes W123 (engine M102 - gasoline, 2.0L, 80kW, with Stromberg 175CDT carburetor). The car has been modified to run on LPG, the modification consists of adding a LPG tank, vaporizer ...
3
votes
1answer
364 views

How much vacuum should be present in a 2 stroke intake manifold?

I have a 2 stroke Mercury 2.5 hp that has recently been dropped in the water. The motor used to run fine but now it won't start. I have dried the motor out and cleaned the carby, it's got plenty of ...
3
votes
3answers
746 views

2003 Nissan 350 Z won't accelerate

We own a Nissan 350 Z and this morning it would not start. It would turn over but it wouldn't fire. After pulsing the gas a little bit it would start but then letting off the gas would cause it to ...
3
votes
1answer
2k views

How to attach PCV breather hose on MkIII Golf?

The old "breather hose" on my Mk3 VW Golf became cracked and fell off. I bought a replacement tube, which connects to part of the PCV apparatus on top of the engine via a hose clamp, but it is not ...
3
votes
1answer
180 views

Jerks on 2nd gear at low speed

My car jerks on second gear when I slow down while on second gear and then want to accelerate back. After changing the plugs and air filter it got a bit better but after driving 500+ miles it is back ...