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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1answer
39 views

Does the crankshaft revolution count matter relative to combustion stroke?

I have a single cylinder engine with overhead cams. If I set the crankshaft/piston to Top Dead Center (TDC) with the cams set to the compression stroke, would it make a difference if I were to rotate ...
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Hi! Crankshaft for 400ci chevrolet engine from 1975 el camino

I've put my engine back together but the crankshaft moves back and forth about 1/8 of an inch. My motor is a 400 chev
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Opel astra H crankshaft sensor issue

I have replaced the crankshaft sensor on my opel astra H 2007. The question I still can not answer is where all those turnings are coming from. The mechanic told me they arr not from the engine side, ...
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On a 2013 Dodge Caravan is there a way to turn the flexplate without turning the crankshaft?

On a 2013 Dodge Caravan is there a way to turn the flexplate without turning the crankshaft? In other words is there a seal or bearing that if bad will allow the flexplate to turn freely?
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oil light flash while pressing gas

I have Hyundai i30 2008, i have changed crankshaft sensor 1 week ago. two days ago i start hearing some noise from motor while in idle and also while moving. Today the check engine light turned on and ...
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Method to remove crankshaft pulley

I am attempting to remove the bolt that holds the crankshaft pulley. However, even with a long bar, the car in sixth gear and the brake on, it was not possible to undo the bolt. I found online that ...
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Is the crankshaft connected directly to the wheels?

If my understanding is correct, a car (in simple terms) has; The crankshaft, then; The clutch and gearbox, then; The propshaft, then; The differential, then; The driveshafts and the wheels. ...
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81 views

Will it do any damage to the auto transmission if I manually rotate the crankshaft at Parking gear?

Car: VW golf 5 1.6 BSE with 6 speed auto(09G) transmission Purpose: Replace the timing belt Reason: Need to turn the crankshaft to match the TDC mark on camshaft pulley Thanks!
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06 Toyota Avalon Sensor positions

Looking for help diagnoising a couple issues with my Avalon. I have some codes coming up, bad crankshaft sensor and bad camshaft sensor. I also have the cel, vsc, and trac light on. I tried replacing ...
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2009 Hyundai Accent not starting after replacing crank shaft sensor

My car died on the road last Thursday with a P0345 code. This indicated the crankshaft position sensor was faulty. Replaced the sensor and now the car does not start. There are no codes presented now ...
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Removed the harmonic balancer with a wooden block and a rubber mallet - did I damage anything

I have the engine out of the car and I had to remove the harmonic balancer, I did not have the proper puller and for some reason I used a wooden piece and a rubber mallet to tap the balancer off the ...
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Will I throw a balanced and blueprinted engine out of balance by gluing magnets to the harmonic balancer?

I want to measure the position of the crankshaft with my homemade car computer and compare it to the signal from the no. 1 spark plug so I can measure the engine timing while driving. I was thinking ...
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475 views

2004 Mazda 3 stalls and bogs down on cold starts

So my 2004 Mazda 3 (JDM 1.5L model) stalls and hesitates during acceleration after a cold start. However, It runs perfectly after 7-10 minutes of idling. The only error code I have is for an upstream ...
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Flywheel being replaced

I have a 2016 Mercedes GLE350, they replaced the crankshaft sensor, car still not running good, now they are replacing the flywheel. This is not normal on a 2016 car with low milage. the car is still ...
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1answer
780 views

Measuring crank and rod journals

Does anyone have any pointers for mic'ing main bearing and rod journals? My engine has all of the main caps cast as an integral part of the lower block so I can't see how I can reliably use ...
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1answer
1k views

I cannot find TDC window on Jetta 2013 2.0 engine

I'm fixing my father-in-law car, Jetta 2013 S 2.0, and I'm in hurry since I need to fix before he come back on Dec 29th. I really appreciate for everybody input. The car has bad camshaft position ...
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1answer
658 views

I want to combine two 4 stroke engine together for my project . What will be the complexities in it ? Will it work? [closed]

Bike engine . Want to add two similar bike engine on a single shaft (https://i.stack.imgur.com/qMN5u.jpg)
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Is it possible to just change the crankshaft and bearing and 1 connecting rod with out changing the heads on the vehicle

I need to replace the Crankshaft and bearings in my 2001 toyota 4 runner is it possible to change with out replacing the heads.
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Oversize rod bearings question

I have a simple question that has been on my mind for a bit and I cant seem to find the answer. My question being: how do I know what size rod bearings to buy? I know that I have to use plastigage to ...
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799 views

Steel for crankshaft's / camshaft's woodruff key

I have a new little problem with the engine I'm rebuilding (Skoda 120L '70s, RWD, RME): after milling, adjusting and cleaning the crankshaft, camshaft and pulley I found out that their woodruff keys ...
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376 views

Why Tachometer shows idle RPM range instantly when closing the throttle and clutching

I have studied that, RPM is the measure of how fast the Crank Shaft is rotating. Lets consider the following case. You are riding in some speed which shows the engine at 5000 RPM. Now you are ...
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Oil Treatment made Nissan Altima harder to use steering wheel

The weirdest thing happened to my 2001 Nissan Altima. I was changing the oil and afterward, I put in oil treatment into the engine - and when I started to drive, the power steering started to make the ...
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518 views

How To Test New Timing Chain Before Engine Closed?

How much crankshaft turns to match the marks again? Car:VW CC Engine: TSI 1.8 Engine Code:CDAA Year:2009
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1answer
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Alternative to seal strips for crankshaft rear-end bearing cap/seal plate?

My engine uses a seal strip in the crankshaft's rear end bearing cap, which also holds the seal plate. But I don't have access to such seal strips...can I just use silicon gasket maker? Or wouldn't be ...
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How are crankshaft crankpin journals ground?

In looking at this question: What is crankshaft grinding and why is it done? @Pᴀᴜʟsᴛᴇʀ2 gave an excellent answer that got me thinking. First, lets include the same picture from that answer so we're ...
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What is crankshaft grinding and why is it done?

I saw a lot of YouTube videos referring to crankshaft grinding, while watching videos about working on crankshafts. I don't understand what crankshaft grinding does. If we grind a crankshaft, then ...
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243 views

How to fix my Honda Ballade. 92 Model (Luxline) [closed]

I drive a Honda and the crank shaft makes a lot of noise especially during high acceleration and it smokes white from the exhaust. Someone said I should just get a new engine as this a typical problem ...
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328 views

What is “seal saver”?

I recently replaced the oil pump in my dad's 1990 Mazda b2200 only to find that after I replaced it it started leaking from the crankshaft seal. He took it in to a local mechanic who pulled everything ...
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335 views

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 ...
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21k views

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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3answers
13k views

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 ...
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3k views

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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1answer
541 views

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?
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254 views

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, ...
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3answers
23k views

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 ...
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1answer
1k views

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 ...
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1answer
7k views

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) ...
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1answer
22k 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 ...
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2answers
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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 ...
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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 ...
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1answer
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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 ...
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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 ...
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3answers
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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 ...
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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 ...
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499 views

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 ...
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1answer
4k 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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2answers
12k views

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?