How do you loosen a timing belt tensioner?
The bolt in the center of the tensioner secures it to the engine block. Use a ratchet wrench 1⁄ 2 to 3⁄ 4 in (1.3 to 1.9 cm) in size to loosen the bolt. Rotate the tensioner away from the belt first as far as possible, then reverse direction. Note any problems you experience.
What does the pulley on the timing belt do?
The snakelike timing belt on the side of the engine is essential for maintaining your car’s performance. It is controlled by a round pulley called a tensioner that keeps the line taught as it rotates. More often than not, the tensioner goes bad before the timing belt does.
Can a bad tensioner cause a belt to break?
More often than not, it is actually the tensioner that goes bad, not always the belt (unless it is really old). Most of the time a belt will break due to a seized pulley or bad tensioner allowing it to contact the timing cover.
What happens when a timing belt goes bad?
More often than not, it is actually the tensioner that goes bad, not always the belt (unless it is really old). Most of the time a belt will break due to a seized pulley or bad tensioner allowing it to contact the timing cover. Listen. A bad tensioner will usually be accompanied by noise.
What are the signs of a bad belt tensioner?
The most common symptom of a bad or failing drive belt tensioner is noise from the belts or tensioner. If the tensioner is loose the belts may squeak or squeal, especially when the engine is first started.
Where is the timing chain tensioner located?
The old timing chain tensioner on the 1ZZ-FE 1.8 liter engine is located on the passenger side at the rear of the engine block. See the picture above for a better idea of the location.
What does a bad timing chain sound like?
Place the probe of the stethoscope on the top or side of the timing chain cover. If you hear a rattling or scraping sound, with no other noise being emitted from the engine, it indicates a bad timing chain.
What are the symptoms of a bad timing belt?
Let’s look at some of the symptoms of a bad or failing timing belt: 1. Engine runs poorly: A worn timing belt can slip, getting out of the proper alignment. 3. Ticking sound coming from engine: A failing timing belt can cause a ticking noise when the car is running.
If equipped with a tensioner screw, back off the tensioner screw. Then, push the alternator toward the other pulleys, loosening the belt. To loosen an NAI tensioner, loosen the locking nut or bolt, then back off the tensioner screw. Push the pulley toward the other pulleys or accessories, loosening the belt.
How do you tighten a tensioner bolt?
Turn the adjustment bolt on the side, top or bottom of the pulley counterclockwise with the ratchet and socket until the accessory belt is loose enough to remove. Tighten the tensioner pulley by turning the adjustment bolt clockwise with the ratchet and socket until the belt is tight.
How tight do you tighten a tensioner pulley?
More videos on YouTube The required measure of tension in the serpentine belt is that it should not deflect more than ½ inch when twisted either way from the middle. If twisted more, the belt is loose, and if twisted less, the belt is too tight. Either of the positions does not work for the vehicle.
What’s the best way to change a timing belt?
Loosen the mounting bolt (s) holding the belt tensioner using any special cam holding tools, while following the service manual. Do not remove the tensioner completely unless replacing it. Instead, pivot the spring-loaded tensioner away from the belt and then retighten the mounting bolt (s) to hold the tensioner in the loose position.
Where is the tensioner on a camshaft timing belt?
The tensioner is a roller which bears on the outside face of the belt. It has two adjustment bolts, one of them fitted over a slot. Slacken both bolts just enough to let you slide the tensioner. Move the tensioner as necessary to tighten or loosen the belt.
How to fit timing belt on crankshaft pulley?
Fit timing belt on crankshaft pulley, starting clockwise. Take care to ensure that timing belt is not creased during fitting! Timing belt must be tight between pulleys on tight side! Markings on timing belt must align with markings on camshaft pulley, crankshaft drive pulley and high-pressure pump pulley (Figs. 6a and 6b).
Can a broken timing belt cause a bent valve?
If you have not already bent your valves with a broken timing belt, you will likely do so if you spin the crankshaft without the camshaft spinning. Determine if the harmonic balancer pulley needs to be removed to remove the timing belt cover.