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

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114 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?
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263 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 ...
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1answer
129 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 ...
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2answers
185 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 ...
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1answer
2k 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 ...
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21 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 ...
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1answer
1k 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. ...
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1answer
978 views

Car won't start problem

I have a problem with my car it won’t start. Just a little background on my car, I have a 2008 Nissan Versa and I have a cold air intake installed in my car with a hydro shield covering the air filter ...
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1answer
509 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 ...
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1answer
523 views

Ford Fiesta Mk6 engine component

I have a ford fiesta mk6. Can someone please identify the hose on the left (green square) ? It's cracked right now and it's leaking cooling liquid (I think). Here is a picture of the engine: PS: ...
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93 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 ...
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110 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 ...
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313 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 466/...
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1answer
962 views

Ford Fiesta - the colour of the water in the water container

I own a hatchback ford fiesta. I took my car out for a drive today for 10 minutes and when I came back, I opened the hood and checked that the water in the water container was quite hot (not ...
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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 ...
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727 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 ...
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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 ...
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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, ...
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38 views

Engine block (?) break, please confirm and suggest causes - 2003 Suburban

There was no indication of a problem last time the vehicle was driven. This morning when starting there was immediate clang/grind sound and rocking of the vehicle. Motor oil began leaking below the ...
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18 views

08 Silverado 5.3 cold start exhaust smoke and engine stall

For some time now I've been getting a considerable amount of dark smoke from my tailpipe on cold starts which I believe to be an oil burning issue. I have an oil consumption test in progress, so far ...
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1answer
78 views

Why does my car engine rev so fast when running uphill

I have a 2015 Civic EX (6000 miles). It's revving 2000/2500/3000RPM at 70/80/90MPH on flat ground. However, it's having 3000RPM at 60MPH when going uphill and EVERYONE was passing me by (Except for ...
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2answers
66 views

Higher idle RPM on first start at morning

Unlike starting the car in the afternoon, after you've already started it at another time of the day. I understand that the higher RPM can be because of the temperature, however on hot days it's still ...
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1answer
341 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 ...
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1answer
41 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 ...
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1answer
47 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 ...
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1answer
681 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 ...
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2answers
101 views

Interpreting Cylinder Compression Readings

So I've been having some engine trouble with my 98 Mazda 626 GF 2L, specifically a low, rough idle and lack of power on acceleration. One of the things the WSM says to check for both these problems ...
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1answer
219 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 ...
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1answer
41 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 ...
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85 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.
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406 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 ...
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339 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 ...
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52 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 ...
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1answer
652 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 ...
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2answers
128 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 ...
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1answer
113 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 ...
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1answer
632 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 ...
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68 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 ...
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3answers
2k views

Massive oil drop in the course of a few days

A few days ago i posted a question about the dealer reporting some oil spillage/leakage but that it passed the mechanical test. I checked the oil level of the car from my 80 minute drive home and it ...
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1answer
1k 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 ...
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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. ...
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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 ...
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1answer
184 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 ...
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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 ...
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1answer
378 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 ...
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1answer
3k 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 ...
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58 views

1995 Mercury Grand Marquis, loud whine corresponding to engine revving

My '95 Grand Marquis (or as I like to call it, a Grandma Rquis) is suddenly very loud. There doesn't seem to be any issue with the performance, and when it's idling, it's as quiet as can be. I'm ...
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2answers
121 views

What is the theory behind rpm and torque? [duplicate]

*I am sorry if this seems too basic for you guys. From what I understood is that fuel and air enters the cylinder, combustion occurs, Piston expands generating work and torque. The Rpm should match ...
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3answers
596 views

Pontiac Sunfire mysteriously won't start

So, here's the deal: -No lights, no noise, no clicking. -Battery voltage reads fine on multimeter. Terminals are very clean and not corroded. -But it won't jump start. -Headlights turn on. -Fuses are ...
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2k views

Car won't start - replaced alternator - didn't help

I have a 5-6 years old Mazda 6 2010, 2.5L engine. My car simply won't start. I had this issue yesterday, so I called roadside assistance and they were able to jump start my car. I drove straight to ...