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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1 answer
63 views

Is it true that crankshaft counterweights help with extending the life of the main bearings?

I have heard that use of counterweights in crankshafts also help with bearing life because "counterweights reduce peak main bearing inertia loads". Is this true? If its true how does that ...
1 vote
1 answer
55 views

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
2 votes
1 answer
298 views

Timing belt issue

I recently got a Mitsubishi L200 Trojan K74 4D56 2006, and after getting through its MOT, I decided to do full service and change belts etc. I followed instructions from the workshop manual http://...
1 vote
1 answer
120 views

Engine Stand fails and BB falls on end of crank/block: what to check before installing?

While trying to rotate my big block Chevy engine over on the engine stand it was mounted to, one of the welds on the stand failed. I had an engine hoist partially connected but it didn't provide ...
1 vote
5 answers
6k views

Do you have to machine the crankshaft after a spun main bearing?

I had a spun main bearing due to low oil, the crankshaft journal is pretty scratched, no dents just looks spun on the surface. To the inexperienced diyer it's hard to imagine this would be a huge ...
3 votes
3 answers
23k 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?
0 votes
2 answers
45 views

Front crankshaft bolt removal

The front crankshaft bolt, that secures the harmonic balancer, which is also the driving pulley of the drive belt, is 184 ft/lbs on my Tacoma. The Haynes manual says to use a pin spinner to lock the ...
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31 views

What could be the cause if long cranking in my 2009 Honda Accord triggers the check engine/VSA light?

I’ve had a recurring problem with my 2009 Honda Accord. Longer than usual cranking triggers check engine/VSA light. Diagnostics pointed to problem with crankshaft sensor. Thus far, have replaced the ...
1 vote
1 answer
25 views

Turning crankshaft specific angle

To check the valve clearances, the Haynes manual for my Tacoma (2006, V6) says to first set the first cylinder of the firing order in TDC, do a sequence of valves, then turn the crankshaft 2/3 turn (...
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1 answer
57 views

Is there any way I can tighten my crankshaft pulley without a torquemeter?

My crankshaft pulley requires 130 nm (95 lb-ft) of tightening torque. I have a torque meter but it only supports up to 80 nm. I can't afford to buy a separate torque meter just for crankshaft pulley ...
11 votes
4 answers
4k 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 ...
1 vote
2 answers
374 views

2008 Saturn Vue wont start after putting in new ECM [closed]

I put in a new ECM and tried to relearn the key but my security light does not come on and stay on. I did a reading and it gave code p0315. Can someone please help me to figure it out?
4 votes
2 answers
7k views

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 ...
2 votes
2 answers
4k 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 ...
1 vote
2 answers
53 views

I recently replaced my crankshaft seal on my 95 Infiniti but it’s still leaking oil in the same area, what could be the problem?

recently replaced my crankshaft seal on my 95 Infiniti but it’s still leaking oil in the same area, what could be the problem
1 vote
1 answer
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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?
20 votes
3 answers
118k views

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 ...
2 votes
1 answer
143 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 ...
1 vote
1 answer
217 views

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 ...
2 votes
0 answers
123 views

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, ...
1 vote
1 answer
990 views

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 ...
0 votes
1 answer
465 views

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. ...
1 vote
1 answer
459 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!
16 votes
2 answers
34k views

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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0 answers
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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 ...
2 votes
2 answers
291 views

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 ...
2 votes
3 answers
21k 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 ...
7 votes
2 answers
6k views

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 ...
9 votes
2 answers
30k views

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 ...
1 vote
0 answers
145 views

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 ...
2 votes
2 answers
1k 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 ...
1 vote
0 answers
32 views

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 ...
5 votes
2 answers
310 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, ...
17 votes
2 answers
31k 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 ...
3 votes
2 answers
546 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 ...
1 vote
1 answer
483 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 ...
2 votes
1 answer
1k 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 ...
3 votes
1 answer
1k views

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.
2 votes
1 answer
1k 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)
5 votes
1 answer
325 views

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 ...
9 votes
1 answer
10k 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) ...
7 votes
1 answer
18k views

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 ...
2 votes
2 answers
1k 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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2 answers
505 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 ...
4 votes
2 answers
181 views

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 ...
2 votes
2 answers
1k 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
9 votes
1 answer
413 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 ...
7 votes
3 answers
31k 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 ...
5 votes
3 answers
5k 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 ...