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

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2answers
2k 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
98 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
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0answers
238 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
85 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 ...
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2answers
43 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
122 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?
7
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3answers
1k 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 ...
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vote
2answers
518 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
196 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
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2answers
1k 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
99 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 ...
2
votes
2answers
356 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. ...
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vote
1answer
112 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
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1answer
468 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
411 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
6k 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 ...
5
votes
1answer
214 views

Reliability of water test for valve seal

I took my valves out, cleaned and lapped them and put them back together. I also put new valve stem seals. At least on one side of my V6 Tacoma. I performed several water tests to check the seal of ...
3
votes
1answer
167 views

Timing Sprocket Marks Disagree with Distributor for TDC

I am in the middle of replacing my 1998 Dodge Dakota 39. V6's timing set. According to the manual and everywhere online, the camshaft sprocket dot should be at the bottom and the crankshaft ...
5
votes
1answer
595 views

Engine run-on (dieseling) condition suddenly getting much worse

1995 Chevy S-10 Blazer - 4.3 L Vortec V6 (vin W with PCM) - 230,000 miles original owner. OBD-I (or 1.5) GM transitional year with OBD-II style connector. I've been working on my vehicle a lot ...
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vote
1answer
245 views

what engine came in 2007 chevrolet avalanche LTZ?

I have a 5.3 Liter engine from a 2007 Chevy Avalanche LTZ. I removed it and swapped in a 6.0 for a customer. What is the name given to this V8? It has an aluminum block and cast 243 heads. I need to ...
2
votes
1answer
326 views

When to Use a Sleeve 'N' Seal?

A Sleeve N Seal is a thin-walled metal ring ~1" deep with an accompanying tube of "seal". It comes with some timing cover gasket sets. To install it, you heat the ring up in the oven on 500 degrees ...
4
votes
2answers
222 views

Is it reasonable to charge the customer $1000+ to assemble the top of the engine?

I recently have an engine overheat issue and see my previous post for details: How long does items in the engine last in general for standard size cars? This is an interesting follow up on that at ...
2
votes
1answer
124 views

1999 Ford Expedition 5.4 sparkplug/ignition coil replacement

I got a service engine soon light and and scanned it. It came out to be cylinder 5 misfire. My truck shook a little on idle more when I gassed it. I talked to some mechanics and told me it would be ...
4
votes
2answers
447 views

VW Golf IV Possible Engine Misfire

I guess I better start with a few details on the car in question: VW Golf IV 20 valve V5 petrol engine (2.3L) ~80k miles on the clock Now the problem, it feels to me as if the car is down on power,...
3
votes
1answer
501 views

How long does items in the engine last in general for standard size cars?

I have a volkswagon passat wagon. It just reach 70000M and it is 2007 model. I recently check the engine at the dealership. Now they asked me to replace all the following items to fix engine overheat ...
3
votes
1answer
44 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 ...
5
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2answers
4k views

Effects of driving through deep water WITHOUT hydrolocking (car still bogged down and died)

So, yesterday we had very heavy rains, and unfortunately I was driving in an unfamiliar area of town. I drove through high water, which caused my car to sputter and so I turned around. The car behaved ...
6
votes
4answers
2k views

Why does the power output peak and then drop as engine speed increases?

I have been looking at the power bands for my car (2000 Opel Agila 1.2) recently, as I want to work out when it is best to change gear and stuff, as I have no life! This is the approximate graph I ...
3
votes
1answer
96 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
267 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
483 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 ...
2
votes
0answers
36 views

My car is running very poorly when I start my 1994 Buick Century

My car is running very poorly when I start my 1994 Buick Century for the first time every day. It will stall out especially at a stop, but starts right back up and it stutters. Plus, the service ...
10
votes
5answers
948 views

Second hand car - Engine/Tyres/Etc

I am looking into buying a second hand car from a reputable Mercedes-Benz dealer (not just some dodgy salesman by the side of a road lol....). Anyway, there are a few maintenance/mechanical things ...
3
votes
1answer
140 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 ...
9
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2answers
3k views

Modern cars and diesel warm-up time

First of all let me say that I already read this question and its answer, so it's clear to me why diesel-powered cars need a warm-up time. My question is: do modern cars need it too? I have VW Golf ...
5
votes
3answers
484 views

Honda FIT GP1 HYBRID 2011 knock

in my auto gear honda fit gp1 hybrid car, (mileage 56 000 KM) I had a engine tune up and changed my injectors (8 injectors) last month and after 2 weeks i started getting a slight knock (jerk or ...
2
votes
1answer
129 views

What does valve lapping compound actually do?

As I understand, valve lapping is done to ensure a seal between the valve and its seal ring at the end of the shaft. I am just curious how valve lapping compound facilitates that? Does it make a ...
6
votes
1answer
1k views

Acceptable amount of slack in a timing chain with high mileage?

1995 Chevy S-10 Blazer - 4.3 L Vortec V6 (vin W with PCM) - 230,000 miles original owner. FWIW, this model car/engine does not have timing chain inspection and/or changing as part of the routine ...
3
votes
1answer
190 views

Should I care about valve order or are they interchangeable?

So I've just learned how to take valves down and I'm pretty fascinated by the whole mechanism. I got a C-clamp compressor and took two valves out just to try. Went smooth. A question: is it important ...
3
votes
2answers
150 views

Why are intake valves dirtier than exhaust?

I took my engine apart and one of the things I noticed, on both cylinder heads of my Tacoma V6, is that the intake valves (picture right) are significantly darker (or dirtier) than the exhaust ones (...
6
votes
1answer
1k views

Engine revs to 4000 RPM without pressing gas pedal

I tried to start my car today but something strange keeps on happening. It turns on just fine, but once the engine is operating it starts revving to 4000 RPM even though I am not pressing the gas ...
2
votes
3answers
340 views

Lugging vs stalling an engine

Does stalling an engine count as lugging it? I know lugging is not good for the engine for various reasons. Does stalling do those to the engine as well? Thanks
4
votes
2answers
229 views

Should I lap my valves if I have easy access?

Now that I have my cylinder heads out of my V6 Tacoma, I am considering taking the valves out to inspect them in case they are bent or whatever and grind them. There is no symptoms of valves ...
3
votes
2answers
199 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
360 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 ...
4
votes
1answer
291 views

What is a stress riser?

What is a stress riser and why is it important to avoid them during engine construction or rebuild?
2
votes
0answers
19 views

Be van with problem at higher altitudes [closed]

2000 euro van engine shuts off when reaching altitude of 9000 feet in mountains. After standing for 20 minutes, it starts. This happened twice but ran well when not in the mountains. Similar to cars ...
3
votes
1answer
54 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 ...
0
votes
1answer
592 views

Non-interference engine explanation animation/Videos?

Non-interference engine explanation animation/Videos ? I did ask my Toyota dealer about published material on 1999 Camry 2.2 non-interference engine that did not cause piston hitting valves/ valve ...
5
votes
1answer
168 views

2007 Hyosung GT250R not starting, some repairs have been made

Hoping to find some good advice on fixing my (above mentioned) motorcycle. I'll try to keep it brief but with as much details as I can. I had an issue with the bike and it sucked up some varnish from ...