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26 votes
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Why do I need to turn my crankshaft after installing a timing belt?

Yes, it's absolutely necessary. As you state, the primary purpose is to check the timing. It is far better to do this by hand and ensure the timing is right rather than to start the engine without it ...
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13 votes

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

I think the main reason for this is convenience. It's an easy place to run the water pump. If you ran it out to a fan belt, it would be in the way of the timing belt while doing it, or it would be a ...
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12 votes
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Strange noise from timing belt area

I don't know if I deserve all this credit. My idea was sound, but my measurements were pretty bad so my numbers are way off. If you try this, use the more precise software that Robert S. Barnes ended ...
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11 votes
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Why would a water pump be run off of the timing belt?

Engine safety. If you lose an accessory belt driven water pump, you're likely to keep driving, thinking the "oh, I just don't have an alternator" while you're busy cooking your engine beyond repair (...
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9 votes
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Diesel engine timing?

Diesel engine timing is accomplished through the fuel injectors (they inject fuel at the proper times). Proper timing prevents pre-ignition because there's no fuel in the cylinder yet to ignite. Glow ...
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  • 4,910
8 votes
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Acceptable amount of slack in a timing chain with high mileage?

Referring to this website: If all is well and there is no slack in the timing chain then you will see about three to five degrees of "reverse motion" before the distributor begins to turn. To ...
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7 votes
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97 Honda Accord won't start after head gasket replacement

You need Spark, Fuel, and Compression for an engine to run. Since this engine was just reassembled, there is a lot to question. Spark - rotor position - beware of caps where the points are not "...
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  • 8,403
7 votes
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Single-cylinder engine - no camshaft position sensor?

In the dawn of fuel injection most cars used a simultaneous double fire system. During every crank shaft revolution the injectors spray half the fuel needed. This way half the fuel waits on top of the ...
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  • 15.9k
6 votes

Timing belt changed, won't start

On the Honda SOHC V6 engine when doing timing the mark on the crank sprocket should line up with a small arrow on the block @ 12 o'clock. The bank 2 cam gear should have the cylinder 1 TDC mark ...
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  • 10.7k
6 votes

Timing belt changed, won't start

quick tip if any one is doing their timing chain or belt. make sure you have a picture showing the tdc( top dead center), double check all the marks match exactly no error is tolerated here, the crank,...
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  • 1,100
6 votes

Timing belt changed, won't start

The OP indicated in their comment that they didn't maintain timing in the process of replacing the timing belt. Since the 2007 Accord V6 has an interference engine, attempting to crank the engine ...
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  • 39k
5 votes
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How is Dodge Spark Advance Controlled by the PCM if there is a Distributor?

While the vehicles are equipped with a distributor the innards of that distributor have changed quite a bit. The distributor no longer contains flyweights or any mechanical timing controls, instead it ...
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  • 15.9k
5 votes
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What is Variable Valve Timing technology?

Variable valve timing permits an increase in the torque in the lower engine speed ranges and increased engine power in the higher engine speed range. Basically, the system alters the relative position ...
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5 votes

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

First, remember that we are talking about four different engine cycles here: Intake; Compression; Ignition/Combustion; Exhaust. Top dead center (TDC) happens between two of these cycles: between ...
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5 votes
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Diagnosing pinging issue in 2003 Nissan Sentra

Pinging is caused by one of several different reasons. It is usually a hot spot in the combustion chamber which is causing the issue. A hot spot is usually made of carbon buildup, the edges of which ...
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5 votes

Timing belt specification

I don't like those "preprinted" marks anyway. You are much better off following the sprocket alignment pictures below. After the belt is installed and the tensioner properly set, crank the engine ...
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  • 12.2k
4 votes
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95 Honda civic timing marks

Rotate the engine so the timing hashes on the VMS cam gear are straight up. Ensure piston #1 is at TDC by checking on the timing mark on the crank pulley is lined up with the mark on the timing cover. ...
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4 votes

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

Before installing the timing belt, I'd worry about engine damage The 2004 Sienna came with two engines: a 3.3 L V6 (code 3MZ-FE), which comes with a timing belt a 3.5 L V6 (code 3GR-FE), which ...
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  • 39k
4 votes

Subaru Forester - Timing Belt

Yes, that should fit O'Reilly's compatibility chart for the Gates TCK304 shows your vehicle under the compatible vehicles. In addition, Amazon's compatibility seems to say the same thing. Are you ...
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  • 1,364
4 votes

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

Excellent question, at present both pistons (1 and 6) are at Top Dead Centre. You will probably have noted this from the zero timing mark on the harmonic balancer (I assume this is fitted!). Mate, ...
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4 votes
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Timing chain issue

If the tensioner has broken in two you'll need to replace it I'm afraid. They aren't mega bucks for those and bodging it back together is just putting a timebomb in place IMHO.
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  • 9,728
4 votes

Lack of power/acceleration

It's possible but extremely unlikely that the timing belt is the culprit to a power loss. The timing belt (or chain in some cases) synchronizes the movement of the pistons and valves in the engine. ...
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  • 14.5k
3 votes

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

Historically the water pump was at the front of the engine in close proximity to the vehicle radiator, when vehicles were mostly rear wheel drive. There is no real advantage with todays vehicles but ...
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3 votes

What is Variable Valve Timing technology?

i-VTEC changes HOW MUCH the intake and exhaust valves can open. VVT changes WHEN the intake and exhaust ports open. It's a lot of information to put in an answer. The short version is that by ...
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3 votes

honda accord 1997 2.2L timing belt

All the important pulleys (the crank, the camshaft(s) and anything else that is vital) will have alignment marks that you can use to align them - usually an indent on the pulley and a matching mark on ...
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  • 28.6k
3 votes

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

Question 1: This depends on engine design. In an interference engine, the valves can collide with the pistons, so you need to design the timing diagram to prevent that. In non-interference engines, ...
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  • 4,402
3 votes

95 Honda civic timing marks

I think the biggest issue that your are potentially having is the aftermarket cam sprocket. The stock sprocket has an UP mark with to horizontal markers that you align to the valve cover surface. ...
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  • 32.8k
3 votes
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Properly Aligning My Timing Marks

When you check the timing previously, you may have noticed the marks being slightly off because some belt stretch. Install the new belt according to the manual (even with the head is very common) ...
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  • 9,035
3 votes

Strange noise from timing belt area

well you either have bad bearings in your tensioner or a really fast telegraph operator in there. Change out that tensioner and its springs which is what should almost always be done when changing ...
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  • 2,859
3 votes

Strange noise from timing belt area

This is a bit of a shot in the dark, but I'm going to point my finger at the tensioner spring. To me, the sound in the video is very... dull. Kind of thudy for lack of a better term. It sound like one ...
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