11
votes
2answers
824 views

Why is a W-16 called, well, W?

The term "W-16" seems to imply some sort of configuration that resembles the letter W, which implies three banks of cylinders with one sharing a common cylinder head. In fact, the Bugatti W-16 in the ...
5
votes
2answers
48 views

Window frozen shut

Its freakin cold outside. I wanted to put my window down a little so I could smoke. However, the driver's window was frozen shut. All the other windows are fine. This in itself isnt all that ...
4
votes
1answer
11 views

Inspecting and reparing third generation (1996-2000) Dodge Caravan heater mode door

How can I inspect or repair the Dodge Caravan heater "mode door"? How much must be removed beyond the glove box? The mode door directs air to defrost or the heater vents, and it is controlled by an ...
6
votes
1answer
37 views

What is a sprag unit and what does it do?

I know a sprag unit is used in the transmission. What is it and how does it work? Is it used anywhere else or is it strictly a thing used in transmissions? Are there different kinds of sprags?
4
votes
1answer
25 views

1994 Silverado not accelerating past 35

I have a 1994 Chevy Silverado. On my way to work today my truck would not accelerate past 35 mph but was revving high rpm's. I stopped and checked my fluids and my ATF wasnt showing anything on the ...
5
votes
0answers
31 views

How will diesel engine perform with air in fuel line?

I recently replaced a fuel filter in my 2005 Dodge Ram 3500 Cummings (5.9L). I'm now getting performance issues: at low speed, and especially starting from a stopped position, I'm getting low power. ...
11
votes
1answer
72 views

Are there any plans to update OBD-II?

OBD-II is ancient It predates the Porsche 911 GT1, Windows 95 and implementation of the Schengen Agreement. I would have thought that SAE would be working to add more diagnostic coverage for ...
10
votes
2answers
1k views

Does Vaseline dissolve rubber?

Recently, someone suggested that I apply some vaseline to an O-ring connection to see if I can find a leak. I've read that oil-based lubricants, especially vaseline, can desolve rubber. It seems like ...
4
votes
0answers
38 views

2008 Vw Jetta won't move? Transmission issue!! Help [closed]

I have a 2008 Vw Jetta 2.5l. On the way to work this morning I stopped at a stop sign and when I took off I heard a clunk and had to coast off the road. It is an automatic transmission and I can put ...
3
votes
0answers
23 views

2005 Altima Shuts off while stopped, starts back up

Nissan Altima shuts off while waiting at a light. While driving at above 45mph it hesitates/jerks. Engine light has turned on only once and gave error code for cylinder#2 it has since not turned on ...
7
votes
2answers
44 views

Proper glow plug operation

Are glow plugs supposed to stay on after the engine has started to help with the firing of the first few revolutions?
8
votes
1answer
52 views

Steering Pump whining; no fluid loss

Over the last 3 month, our 2005 Honda Odyssey has had a whining steering pump. Here's a bit of the background, from the day that it started until present. One day in mid-October: Get a call from my ...
6
votes
3answers
430 views

Conversion from kW to HP?

Many of the European manufacturers of cars and motorcycles publish their ICE power numbers to reflect kW rather than HP. Is there a reason for this? What is the conversion for kW to HP?
1
vote
0answers
46 views

My mechanic forgot to put Coolant and now my car is not work! what can i do? or who should i blame [closed]

I had a small accident and I hit the whole front of my car and the radiator was damage. I took it to my friends mechanic (which i though i could trust) and asked for an estimate. He owes a Bodyshop ...
1
vote
0answers
27 views

The critical components that define an Adv tourer from other motorcycles [closed]

Mainly want to understand the running of an adv tourer. 1) what is the basic difference between the showa suspensions,WP suspensions and an upside down fork? Advantages & disadvantages of the ...
5
votes
3answers
45 views

How accurate and precise is a dyno and why?

It was pointed out to me that if you do two back to back runs of the same car on the same dyno the graph of the results will be different. Also, if you run the exact same car on two different dynos ...
4
votes
1answer
37 views

How Much Grease to Put into the CV joint?

I'll be replacing my CV boots soon and was planning to clean out all the old grease and put in new grease. Should I pack the whole thing full of grease, including the boot, or is just packing the ...
4
votes
1answer
28 views

Best Way to Clean CV Joints of Old Grease

I'll be replacing the CV boots on my axles pretty soon and was wondering what the best way to clean the old grease off is. Are there any common solvents that would be useful, or are just a bunch of ...
3
votes
0answers
23 views

VW Golf TDi smoke

My 44k miles 1.6 TDi after a 2m down hill drive from cold and stopped at lights began to smoke - burning the oil smell which lasted fo several miles.Engine has now apparently returned to normal. Any ...
7
votes
4answers
433 views

Corrosion on battery, won't start, making clicking noise, won't charge

I'm trying to charge the battery on my 2002 Celica. Here is some background: Battery is a bit old, around 3 years or so. Corrosion has been building on the battery to the point that it almost ...
5
votes
1answer
32 views

Trouble starting car, cold weather. MB A140 W168

So, I have a Mercedes-Benz, A140 W168. I moved to Finland about 18ish months ago which is when we bought the car 2nd hand. Last winter temperatures only went down to around -15C (5F) degrees, and ...
6
votes
1answer
62 views

ATMA on OBDII not Working

I have successfully connected a terminal android app to the obd port of my car. And tried dry run of many at commands, many are working as expected. But ATMA (AT command to Monitor All) is not ...
5
votes
1answer
40 views

Advice on learning automotive repair knowledge

I am an online customer service selling automotive diagnostic tools. Now I have a question, I came to my company since last October. I don't know much about our product, even though I am just a ...
5
votes
1answer
28 views

Toyota corolla verso 1.794 petrol vvt-1-t2 [on hold]

Recently Purchased Vehicle @milage 81.075 in the past vehicle has consumed 5.25 Litres of oil a full oil composition test was carried by my Garage. They also advise it is an uneconomical repair it has ...
4
votes
2answers
54 views

What is meant by bore and stroke?

All engine specifications reflect a bore and stroke number. Example Aprilia Tuono V4 R 2012 Four stroke, longitudinal 65° V four , DOHC, 4 valves per cylinder 998.9 cc / 60.96 cu in Bore x ...
14
votes
4answers
1k views

What are the benefits of a dry sump?

I've heard references to dry sumps, usually in reference to racing engines. But more recently I came across an article about a 'supercar' which stated that it had a dry sump. What are the benefits of ...
5
votes
1answer
104 views

How do old cars actually lose horsepower?

I have heard that when a car gets old it slowly but surely loses its horsepower to some degree. For example, I used to drive a 1997 Ford Fiesta with a 1.25L 1242cc engine that supposedly produces a ...
8
votes
2answers
48 views

How do I go about replacing the head gaskets in my Dodge truck?

It's a 1999 Dodge Ram 1500 4x4, Laramie SLT, automatic transmission, 5.9l magnum engine, and crew cab (222k mi). It seems to have some head gasket leaks, as there is some coolant burning. I have only ...
5
votes
1answer
30 views

2006 Honda Civic Hybrid - instrument panel lights going haywire

My wife has a 06 HCH that we bought from an individual owner January of last year. It's been running fine, until Jan 5th of this year. It seems the IMA battery is degrading, but that shouldn't cause ...
8
votes
2answers
45 views

Scooter: Motor goes off when accelerating

A friend wants to sell me a scooter for a very cheap price. It is a Chinese model (Qingqi QM125T-10M). Probably a 125cc machine. He tells me that the scooter worked fine and he used it to go to work ...
8
votes
2answers
384 views

What are some good options for bumper pushing

What is a good way to push with your bumper without ruining the body of the car you are pushing (paint scratches do not matter.
3
votes
1answer
31 views

Are there any vehicle engines that don't have a mechanical oil pump?

I my answer to How to move car a small distance without tow dolly I suggested putting a manual transmission vehicle in 3rd gear while towing with a rope or strap to apply back pressure and help keep ...
1
vote
0answers
14 views

trouble codes on a 1993 chevy silverado

when I hook my scanner up to view the check engine codes it says I have no power to my scanner. I tested all circuits and my fuses are all good. what could be my problem?
4
votes
1answer
24 views

Vehicle light problems 101 (2000 buick century)

How can make really dim brights brighter. And the dash light doesn't turn on (the prnd and mileage lights). I've jumped my car once when it died and they all turned on but they never did after ...
4
votes
0answers
29 views

Why would headlights stop working after turning over

I have a 2006 Pontiac G6. When I walk up to the vehicle and unlock it, the headlights turn on. After I get into the vehicle and turn it over, I cannot turn the headlights back on. Fog beams and turn ...
3
votes
2answers
43 views

2004 VW Passat B5.5 - Why are my wing mirrors being weird?

Today whilst I was trying to park my 2004 VW Passat B5.5, I noticed that something to do with my wing mirrors wasn't working quite right. When the toggle was on the left position, the left wing mirror ...
4
votes
4answers
40 views

Replace or recharge a battery after is has been drained?

The keys in my car were left in the on position for about 12 hours (and maybe the interior light left on) and the battery is drained. Is there any way I tell if I should replace the existing one or ...
7
votes
1answer
50 views

Issues cold starting diesel van

Our van has been progressively getting worse at starting up in the morning. It only has issues when the engine is cold. Initially I thought it might be the glow plugs. I tested their resistance and ...
6
votes
1answer
26 views

Scania clutch issue with syncromesh gearbox

The clutch of our 124 Scania stopped working properly with the "14 speed" syncromesh gearbox. The first time it happened, it ground instead of smoothly going into reverse (a non-syncro gear), to back ...
3
votes
0answers
22 views

Ford Focus 2012 Continuous Wiper Issue

I run a 2012 Ford Focus Zetec which has been having an issue, I think, when the wipers are set to continuous mode. Occasionally, the wipers will switch to intermittent mode when in continuous mode. ...
5
votes
1answer
32 views

ECM Fuse Blown what to test next

Recently I was on the highway and suddenly my car broke down and it was cranking and all but not starting so I knew some fuse has blown. I removed the indicator fuse and used it for fuse which gave ...
10
votes
1answer
45 views

What is the efficiency delta between rotary and modern four-stroke engines

Background There is a lot of opinion out there regarding the efficiency delta between wankel rotary engines and four stroke engines of various configurations (forced induction, etc). This delta, ...
6
votes
1answer
37 views

What are the basics of the combustion cycle in wankel (rotary) engines?

I'd like to understand more intimately the basics of the wankel engine combustion cycle. What I find interesting is: Simplicity of design Use of ports for intake and exhaust Conversion of energy to ...
1
vote
1answer
57 views

How would you move a small vehicle a relatively short distance [duplicate]

I'm buying a honda and the owner said it doesn't start( it's 400$ so worth it) and am trying to figure out a few things 1 would be what are some things to check on it since it hasn't been started ...
5
votes
2answers
98 views

How to move car a small distance without tow dolly

How could you move a small car a small distance (like 5 blocks) without a tow dolly or tow straps I have rope but don't have tow straps.
6
votes
0answers
40 views

Ford Tractor 5600

This is a older tractor. My question relates to the fuel system. The older fuel injectors don't have any external seals? All of them seat and 3 don't leak but one does. I was looking for a seal but ...
3
votes
1answer
19 views

2003 Chevy Malibu Deluxe. Engine counter balancer timing

I replaced my timing belt. Now the engine vibrates horribly. I believe the cam timing is 100% but I believe I didn't time my counter balancer correctly. The Haynes manual photos and description ...
7
votes
1answer
35 views

2005 Mazda 3 at warning light at cold start ups

I've noticed recently that my mazda 3 on cold starts would show the at warning light. When I start it, it normally flashes it for a few seconds then disappears. Then when I pull it out of the garage, ...
12
votes
2answers
687 views

What does under-square and over-square mean?

When building an engine, the terms over-square and under-square come up. What do these terms mean? How do they apply to engine building? Which is better for what purpose? Can you give examples ...
6
votes
1answer
71 views

What exactly is an “idle jet”?

I think this thing has something to do with injecting fluids in to the engine. What exactly is an "idle" or "pilot jet"? Does every car have one? What is their functional purpose (i.e. what do they ...

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