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Questions tagged [timing]

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12
votes
3answers
4k views

Strange noise from timing belt area

I just changed the timing belt and water pump on my 98 Mazda 626. After I got everything reassembled I started up the engine. I had been running the engine for a few minutes, revved it up to around ...
11
votes
4answers
9k views

Why would a water pump be run off of the timing belt?

I drive a 1999 Chrysler 300M, V6 3.5L engine. I am about to start a water pump replacement repair. I've discovered that the water pump is driven off of the timing belt, rather than either of the two ...
8
votes
1answer
11k views

Acceptable amount of slack in a timing chain with high mileage?

1995 Chevy S-10 Blazer - 4.3 L Vortec V6 (vin W with PCM) - 230,000 miles original owner. FWIW, this model car/engine does not have timing chain inspection and/or changing as part of the routine ...
8
votes
1answer
407 views

Why are these paint dots under the timing belt cover not consistent?

I am about midway done with changing the timing belt & water pump on my 1999 Toyota, which features a 6-cylinder 5VZ-FE engine. After getting the front timing cover off, I discovered that there ...
7
votes
3answers
1k views

Single-cylinder engine - no camshaft position sensor?

I'm doing some research on the Honda CRF450. This is a single-cylinder engine. I'm interested in the fuel-injected models (not the older carbureted versions). As far as I can tell, this engine doesn'...
7
votes
2answers
329 views

How much can sub-optimal octane affect efficiency or power?

Suppose a production fuel-injected engine is tuned for 93 octane fuel. As I understand it, the engine can still run on lower-octane (i.e., less knock-resistant) fuel, but it will pull timing to avoid ...
6
votes
1answer
842 views

High vacuum pressure on idle after timing gear and chain replacement

I just got my 1980 Chrysler LeBaron 318 V8 back from the mechanic, who replaced the timing gears and chain, which were the originals and very worn. Soon after leaving the mechanic, I noticed my ...
6
votes
1answer
760 views

Clicking noise in Opel Astra

I just bought a 99 Opel Astra and I have noticed a clicking noise in it. I opened the bonnet and it sounds like it may be coming from the timing belt! I really don't know though. The guy i bought it ...
5
votes
2answers
6k views

Diesel engine timing?

A petrol engine can fire the spark plugs slightly earlier or later to account for factors like revolution speed and engine temperature. However a diesel only fires when the mixture is compressed. ...
5
votes
3answers
4k views

97 Honda Accord won't start after head gasket replacement

I recently replaced the head gasket on my Honda Accord. The cylinder head was tested at a machine shop and they also replaced the valve seals. I didn't do any work to the cylinders, except use ...
5
votes
1answer
4k views

Properly Aligning My Timing Marks

I've run into an interesting dilemma. I'm doing my timing belt / water pump on my 98 Mazda 626 2L and am at the point of putting the belt back on, but something has come up. I checked my timing ...
4
votes
2answers
29k views

4 stroke valve timing diagram: if valves are open during TDC, wouldn't they hit the piston?

I am studying valve timing diagrams. Many of them show something like (for instance) the exhaust valve stays opens till ~20 degrees after TDC and the intake valve opens ~12 degrees before TDC. Wouldn'...
4
votes
2answers
19k views

95 Honda civic timing marks

I have a 95 Honda civic with a D16Z6 engine. I was trying to check the timing on the car, and wanted to get the engine to TDC. There were a few marks on the cam gear. There was no up pointing arrow, ...
4
votes
2answers
9k views

how to determine TDC after bottom end rebuild

here is my question, i want to know how to find TDC on compression stroke, the only problem is how do you find it without the cams or valves(they would have been taken off and then put on again ...
4
votes
1answer
292 views

98 Mazda 626 GF 2L ATX zero ignition timing at idle?

My 1998 Mazda 626 GF 2L ATX has zero ignition timing at idle when fully warmed up causing a rough idle condition. I've replaced the faulty O2 sensor with no effect on the retarded timing and replaced ...
4
votes
1answer
352 views

1997 Infiniti J30 is sometimes very slow to get power after a full stop, otherwise fine

My 1997 Infiniti J30 is sometimes very slow to get any power when I start going from a full stop. I can put the pedal to the floor, and it will slowly creep forward for 3-5 seconds, then suddenly ...
4
votes
0answers
482 views

Timing chain cover gasket

I posted a few weeks ago about cooolant leaking from the timing chain cover of my 2002 Corolla: Corolla - Coolant leaking from timing chain cover I went ahead and started to do job: removing the ...
4
votes
0answers
88 views

What would cause the cam carriers to shatter on my BMW 3 Series (2011)

The timing chain has stretched and the cam carriers have shattered after only 72,000 miles. What could cause this? I have found out that the car was mapped/chipped by the previous owner. Have no idea ...
3
votes
4answers
5k views

Timing belt changed, won't start

I just did the timing belt change in a Honda 2007 V6 Accord. I thought I aligned the belt, but I guess I didn't. Now it won't cranks but won't start. How do I fix the timing issue? mark on Crank is ...
3
votes
2answers
2k views

What is Variable Valve Timing technology?

Recently when I visited a car showroom the salesman pitched the car by saying it has VVT technology which is superior compared to other cars. I researched and found out that it alters the valve ...
3
votes
1answer
576 views

How is Dodge Spark Advance Controlled by the PCM if there is a Distributor?

The Chilton manual for the late 90s and early 2000s Durango and RAM says that PCM controls ignition timing and spark advance. I don't understand this, because these motors are equipped with a ...
3
votes
2answers
474 views

honda accord 1997 2.2L timing belt

I took off the timing belt and balancing belt before finding top dead center what can I do to get everything lined up before I put belt back on
3
votes
1answer
1k views

Diagnosing pinging issue in 2003 Nissan Sentra

While under load, the engine sounds like there is a bunch of marbles bouncing around in the engine. Revving the engine in neutral does not create the noise. Filling the gas tank with 93 octane instead ...
3
votes
1answer
32 views

Timing belt specification

I'm looking for the timing belt specification for my 1999 Subaru Legacy Outback. I need the number of teeth that are supposed to be between each mark, as my (replacement) belt came without the white ...
3
votes
2answers
534 views

2011 f150 ecoboost timing chain and valve train

Looking to find the book rate for how many hours labour to change full timing set including vct's, chains and intake cams 3.5l ecoboost
3
votes
1answer
216 views

Does the number of teeth on a reluctor wheel matter? (crank position)

A little background: I have a project car with an EFI system from 1985 where TDC is (apparently) measured by a little gear in the distributor. I'm slowly switching over to an aftermarket ECU that ...
3
votes
2answers
3k views

1600cc VW Aircooled Engine Backfires with no power when hot

I'm working on a custom built trike based on a 1600cc Air-cooled VW engine. I'm a specialist auto-electrician and these engines are a bit before my time so I'm struggling to work out what is wrong. ...
3
votes
1answer
3k views

What is the direction of rotation of the motor?

On 2005 Chev Classic 2.2 Ecotec, what direction do I need to turn it after replacing timing chain? I want to know what direction the motor rotates clockwise or counter-clockwise (anti-clockwise) when ...
3
votes
1answer
51 views

Rover Mini Mayfair Auto 1990/H

When cranking, the engine turns and there is a spark....not strong. I can't find the timing mark through the circulled(rubber) hole, but the arrow shows on the cover. How can I freely turn (by hand) ...
3
votes
1answer
2k 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 ...
3
votes
0answers
43 views

Making a Poor Man's Water Injection System

I was just reading this article on water injection systems and they made an interesting comment: Note that it has been suggested in some circles that the water can be directly added to the petrol ...
2
votes
3answers
13k views

How do I determine if I am on 1 or 6 at TDC?

The crank has been turned since the timing gears were installed. The distributor is out of the engine. I still have to put the push rods in. How do I determine if I am on 1 or 6 at TDC?
2
votes
2answers
487 views

Motorcycle: fuel and spark but no ignition?

I inherited a '79 Yamaha XS400 (2 cylinder, 4 stroke, air cooled, SOHC, duel carburetors). The timing chain had broken so I replaced it, setting the timing at the same time. I cannot start it. The ...
2
votes
1answer
569 views

my timing belt is broken and top dead centers (TDC) are off

T-belt on Sienna 2004 was broken. How do I do re-timing for my car both cam-and-crankshafts before installing the t-belt? Thanks
2
votes
1answer
170 views

Subaru Forester - Timing Belt

I have a Subaru Forester X Limited AT 2000cc 2AB 2009. The timing belt requires replacement. My question is if the Gates TCK304 Timing Belt Component Kit, fits my Subaru?
2
votes
1answer
2k views

97 manual ford ranger throwing a camshaft position sensor code

We've replaced the computer, sensor and timing belt(not sure of we did it right). Relays are good. Truck will fire, stay running for about 30 seconds then bog down & die
2
votes
2answers
13k views

Does timing jump cause engine replacement?

Does timing jump cause engine replacement? =========================================== My TOYOTA Camry 1999 was driving OK. I do check under the hood on and off, I did not do that check for awhile. ...
2
votes
1answer
20 views

2002 Saturn V6 L300 installing a timing belt

How many revolutions are required to hand crank a timing belt from Top Dead Center to Top Dead Center?
2
votes
1answer
6k views

When to replace the timing belt on a 2015 VW Golf TDI

I own a VW Golf TDI 1.6 Mk7 (2015) Odometer: 82,000KM. I would like to know at what Odometer reading should I change the timing belt/chain.
2
votes
1answer
24 views

1992 Fox Body 5.0

My son has a 92 Fox Body Mustang with the 5.0 Ford engine. We’re having problems setting the timing. The timing marks for coming up underneath the car rather than on the timing gage. We pulled the ...
2
votes
1answer
1k views

Bad exhaust leak or valve interference after HG change?

2006 Volvo s40 2.4i I replaced my HG the other day (I've done a few before with no problems). I was very careful marking everything. Locking the cams together with a cam locking tool specific for ...
2
votes
0answers
355 views

Slipped timing belt. Can hard cranking an engine with cam timing way off likely cause valve damage?

I have a 1979 Austin Sherpa with an "O Series" 1700 petrol engine. Engine was running great before I replaced exhaust/inlet manifold and an SU Carb. Then it just wouldn't start. The engine was ...
2
votes
0answers
67 views

Spark timing advances as engine gets hot

I bought a timing light to check my spark timing; my vehicle is a 93' Mazda Miata and I am rotating the Cam Angle Sensor to advance or retard my timing. When I first used my timing light the engine ...
2
votes
0answers
1k views

Timing related on 2000 Ford Excursion 6.8 Liter V10

Kind of a lengthy question. I had to pull the cylinder heads in order to repair exhaust manifold bolts that were broken. Unfortunately, I was not able to do it from the wheel wells. Before starting ...
2
votes
0answers
104 views

honda accord 2000 lx valve chatter

Timing belt was replaced and now there is a noticeable valve noise at 1600-1900 RPM. No noise at idle. Once you hit 2000 RPM and above no noise. Power is good across RPM band. Checked valve ...
1
vote
1answer
432 views

Timing chain issue

I'm working on a 2002 Ford Explorer XLT 4.0 2WD 6cyc SOHC gas And I just so happened to break the chain tensioner, yup. You heard it right. As if I didn't hit enough stripped bolts along the way. The ...
1
vote
2answers
37 views

Setting distributor correctly

I just got my engine back from the rebuilders. 1965 Pontiac 389 They have crank timing Mark at tdc on the front pulley. The distributor is not installed. The problem is that I don't know if piston 1 ...
1
vote
1answer
18 views

How to time a 2001 Saturn 2.2liter DOHC?

I had a weird problem. Drove the car two minutes up the street to a gas station to get air in the tires. It is literally two minutes. Car ran fine. No problem. I shut it off. Got out to pump the tires....
1
vote
2answers
98 views

Did my mechanic break my car?

I recently brought my car in for a 175k recommended maintenance (oil change) and when about to drive out of the dealer i heard a loud knocking sound from the engine. I asked them to keep the car and ...
1
vote
1answer
65 views

proper time for changing timing belt

Is it recommended to wait until it reaches the recommended mileage before changing the timing belt even if it is already 3 or more years