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

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2
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1answer
127 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 ...
3
votes
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 ...
2
votes
2answers
1k views

Car still burning oil after replacing head gasket and rings; what's next?

I have a 1991 BMW e34 525i with 374,000 km which burns oil. I don't have any leaks, and I have little smoke when I go uphill and accelerate. I have replaced the cylinder head gasket set and the ...
3
votes
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 ...
2
votes
1answer
298 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 ...
3
votes
1answer
146 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
197 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 ...
1
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1answer
102 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.
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2answers
455 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
191 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 ...
2
votes
2answers
335 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. ...
6
votes
3answers
16k views

How do I find a vacuum leak? I'd highly prefer not to use a carb cleaner spray

The car is a 1998 Oldsmobile Intrigue with 3.8L V6 engine (3800 Series). I've been doing my research and due diligence, but please understand I'm very inexperienced with automobiles. I went to ...
4
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0answers
95 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 ...
3
votes
0answers
167 views

Engine randomly turns off on Mazda Capella 2000

Recently I have been having some issues with my Mazda Capella 2000 occasionally just switching off while I am at low revs. It doesn't often happen but when it does it seems to happen multiple times in ...
5
votes
1answer
64 views

Rebuild for longevity

So, I have a question about a 98 2.0 rt neon. I am going to get a top/bottom rebuild on it, the block has 260000 km on it. I have seen rebuild kits on the market anywhere from 300 dollars (ebay ...
2
votes
2answers
146 views

how a car engine can get accustomed on some behavior?

A lot of people say that a car engine gets accustomed to the driver style and in particular to specific RPM gear changing and it will perform into those "learned" parameters. I must mention that I am ...
1
vote
1answer
149 views

1974 Ford Econoline E200 Van acts fuel starved after warm up

I have a 1974 Ford Econoline E200 Van with an 8 cylinder with the present symptoms: It starts and runs great, but once is warmed up, it feels like it is not injecting fuel. It loses power and slows ...
4
votes
2answers
214 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 ...
1
vote
1answer
247 views

Saab 93 Automatic died when waiting for traffic light and won't start again

I just bought a 2006 Saab 93 Aero 2.0T automatic in October, 72000 miles. Everything seems perfect. But 2 weeks ago, the engine died while I was waiting for red light in the town centre, I just braked ...
2
votes
1answer
121 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 ...
2
votes
2answers
926 views

is there any way to adjust my idle speed - 2003 Cadillac CTS

My 2003 CTS vibrates pretty bad at idle speed (around 600 RPMs) But If I rev up to 800 or so, it's totally smooth. The real problem is partially due to worn motor mounts, but I dont want to spend $...
1
vote
3answers
79 views

2001 Honda Civic timing belt assembly repair question

I have a 2001 Honda Civic. I bought it almost 2 years ago at just over 100,000 miles. It now has almost 116,000 miles and when I took it into my mechanic for a failed sensor replacement he told me ...
5
votes
3answers
456 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 ...
10
votes
5answers
935 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 ...
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
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.
3
votes
1answer
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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vote
2answers
202 views

Can someone identify this part of the engine on a TVS Apache

I tried looking up everywhere, and this is unique to this bike. Can someone identify the below component. Looks like a pipe connecting the engine with starter motor. Close up of the engine , both ...
3
votes
1answer
404 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
35 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 ...
2
votes
1answer
669 views

Toyota Avensis Intake Manifold Rattle Fix - quesion about gasket

I have a Toyota Avensis which has the intake manifold rattle problem. I asked the dealer for a price on the new part and he quoted me €400. From a breakers yard they are hard to get and the going rate ...
9
votes
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 ...
6
votes
1answer
898 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 ...
32
votes
9answers
47k views

Is it necessary to 'burn in' or 'break in' a new car?

I've just bought a new 2011 plate car. I've heard stories of people 'burning in' engines for the first few hundred or couple thousand miles using methods such as: Not driving above 50 mph. Varying ...
7
votes
2answers
4k views

What is this loud semi-regular clicking on a 2001 Honda CR-V?

Due to the nature of my problem I've had little success on Google. I appreciate any help. I have a 2001 Honda CR-V EX with 130000 miles on it and I'm the original owner. The week prior to my ...
2
votes
3answers
320 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
5
votes
5answers
2k views

What good is it for an engine to have lower CCs and higher BHP?

I was watching "The Perfect Road Trip 2" by Top Gear, where at some point Richard Hammond is driving a Mercedes A45 AMG. He says that the car develops a whooping 355 BHP, and all that comes from a ...
3
votes
1answer
37 views

Dodge Caravan 2000 sudden rev

My Dodge Caravan 2000 suddenly revs at high speeds. When travelling at 70km/h, the rpm would suddenly go from 1.5k to 2-2.5k instantly and jerks afterward. I'm not really a car guy so if you guys ...
4
votes
1answer
812 views

Oil pressure decresases when I step on the gas

I have a 1982 Mercedes W123 with a 2L gas engine. I have noticed some weirdness with the oil pressure and want to know if this is an indication of a problem. Let's say I am driving at 60km/h and the ...
3
votes
1answer
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 ...
0
votes
1answer
566 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 ...
1
vote
1answer
35 views

2004 Chevy Silverado 4.8 check engine light on

Codes are: P0101 mass air flow circuit failure. P01071 bank 1 lean and P0174 bank 2 lean. Did a replacement of the intake manifold gaskets and a fuel injector de-carbonization service. After 40 ...
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 ...
4
votes
1answer
283 views

What is a stress riser?

What is a stress riser and why is it important to avoid them during engine construction or rebuild?
1
vote
0answers
181 views

Gas pedal suddenly not giving power to my car [closed]

I have a 2006 Mitsubishi Lancer.I was driving about 110 km/hr and then my car started to lose speed. I was pressing on the gas pedal but it was like it lost the ability to work. My battery light and a ...
4
votes
3answers
6k views

Why do valve lifters get stuck? How come they unstick by themselves?

I've seen this happen on a couple of different engines so far (BMW S62, Mitsubishi 4G63) but am not sure about how commonplace it is. If an engine isn't used for an extended period of time, the ...
1
vote
2answers
448 views

2006 Infiniti G35 - Blown engine following Kwik Kar engine flush

(Apologies in advance for the lengthy post.) Background 2006 Infiniti G35 Coupe, 6-speed manual, 112K miles. I bought the car from a friend when it had about 50k miles. He had the car for the ...
5
votes
1answer
1k views

Is cylinder leak down test needed if compression test results are fine?

If I compression test my engine and the results are fine, could there ever be any need to leak-down test it as well? IOW, can a leak down test ever fail if the compression test is fine. RELATED: ...
7
votes
1answer
1k views

Why does an engine's idle RPMs take time to settle from a cold start?

I've noticed my car's (healthy) engine will idle at a slightly higher RPM for a few moments after it's been started from cold/not run for a day. I also noticed that my (somewhat less healthy) other ...
1
vote
1answer
347 views

Are Boxer Engines Easy to Work On? [closed]

How hard are boxer engines to work on and how common are they? Specifically, I'm looking at a Subaru Impreza with a 1.6L EJ16 boxer engine ( which seems to be in very good condition ) and am ...