Questions tagged [crankshaft]

A component within an internal combustion engine which converts the reciprocating motion of the prisons to rotary motion which can be transferred to the transmission.

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V6 Toyota 4Runner - Broken Crankshaft Pulley

I am new to working on cars and this is the first timing belt change I have attempted. I was trying to remove the crankshaft bolt using a breaker bar and my pulley broke. Now I am unable to remove the ...
EasyOhm's user avatar
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7 votes
3 answers
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A safe way to turn the engine without a crankshaft pulley tool?

Car: Audi S5 4.2L 8 cyl, 6 speed manual Purpose: I want to clean the carbon build up on the intake ports and valves. The reason: Not all the valves are closed at the same time, and so the engine ...
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How to loosen the crank pully bolt with hand tools?

I remember when I wanted to change the dust covers on my axle, what a pain it was to break free the axle nut with my breaker bar. I have only standard hand tools. I can only imagine that loosening ...
Robert S. Barnes's user avatar
5 votes
3 answers
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Can I run the engine for a short amount of time with a loose crankshaft pulley bolt?

I have a 2001 Honda Prelude SH (Honda H22A4 engine). I am about to tackle replacing the timing belt and the cam/crank/balancer shaft seals on my own. However, the one tool I don't have is a torque ...
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How would a camshaft start moving during a cold start?

I want to know how would a camshaft ( and valves by association ) start moving on a cold start up? What gets them running and moving. Are there something they connect to to get them going?
user15938's user avatar
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Pivoted curved-path piston engine

Years ago, I saw a documentary about engine efficiency where people were testing a pivoted, curved-path piston engine. The claim is that the standard piston engine, with straight up-and-down path, ...
fernacolo's user avatar
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8 votes
3 answers
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How to lock crank shaft while torquing central screw?

It seems I have to replace the oil seal at the pulley-side of my crankshaft. According to the technical manual of my car, the central screw should be torqued with 120-145Nm. I don't know how much ...
sweber's user avatar
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Hand turned the crankshaft while in gear. Clutch damage?

My timing belt broke on a 2008 Hyundai Accent and due to being broke I decided to try and fix it myself. I managed to get everything off, two slightly bent valves on the head which I took to a shop ...
Dave's user avatar
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9 votes
1 answer
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Why won't my crankshaft turn a full rotation?

I have a 95 Camry LE (v6) and I'm in the process of replacing the water pump. One of the prerequisites for accessing the pump is crank pulley removal. User cdunn (thanks a bunch for the suggestions) ...
Nathaniel Davidson's user avatar
9 votes
1 answer
39k views

removing crankshaft pulley without the puller tool?

It sounds ridiculous but I have to wait until tomorrow for the tool, but I'm sure there is a way to do it? I haven't even attempted it yet on fear that I mess something up big time. My 95 Camry ...
Nathaniel Davidson's user avatar
17 votes
2 answers
34k views

What mechanical revolution is measured in "RPM"?

I do realize that it stands for revolutions per minute, but what are the revolving pieces that are measured? Assuming it is the crankshaft, is RPM calculated by the crank shaft sensor, or by some ...
method's user avatar
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What is a "crank throw" and how can I determine the number of crank throws on an engine?

This term is confusing me a little and I wanted to make sure I understood it correctly. Based on my understanding of the Wikipedia article, it looks to me like a crank throw is what allows the piston ...
Zaid's user avatar
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Is firing order sufficient to tell if a crankshaft is cross-plane or flat-plane?

If I know the order in which the cylinders on a V-engine fire, can I know for sure whether the engine has a cross-plane or flat-plane crankshaft?
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What does a flywheel do and what is it connected to?

I understand roughly how an engine works and that there is a crankshaft which is able to turn the flywheel using internal combustion. I have just realised that I have got absolutely no idea how the ...
Max Goodridge's user avatar
7 votes
1 answer
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What are crankshaft bearings and how are they different from camshaft end bearings?

I hope the answer is not too similar to this question. I have a basic understanding of the role a crankshaft plays in the internal combustion engine, which leads me to ask: Crankshaft Bearings What ...
Max Goodridge's user avatar
11 votes
4 answers
5k views

Why won't my engine rotate?

After doing some maintenance on a 2000 Porsche 911 engine (3.4l normally aspirated), I find that I can manually rotate it with a wrench on the flywheel, to a certain point but no farther and I can't ...
Edward's user avatar
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Filling gouge on oil sealing surface in aluminum engine block

I bought a 2004 Subaru Impreza Outback Sport (2.5L EJ251 SOHC) a year ago and have found a leaking crankshaft seal. When going in to replace it, I see that the leak is probably caused by a small gouge ...
tef2128's user avatar
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Sticking While Rotating Crankshaft By Hand

One thing I noticed while trying measure cam lobe to lifter clearances on a 98 Mazda 626 GF 2L, was that when I rotate the crankshaft there seems to be one spot where I have to put in a lot more ...
Robert S. Barnes's user avatar
3 votes
1 answer
9k views

Holding crankshaft still while unbolting pulley by shifting to smallest gear

I've heard that it's possible to hold the crankshaft still, for the purposes of unbolting the pulley, on a manual transmission vehicle without a special tool, by shifting it in the smallest gear (5th ...
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Does it matter which side to turn crankshaft?

When doing things like setting TDC or just random testing (of the timing chain/belt, for example), does it matter whether the crankshaft is rotated clockwise or counterclockwise?
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