The ZX2 Zetec is a non-interference engine. This means the valves are not capable of touching the pistons at any time. If your belt breaks, there will not be any valve damage. There are reliefs cut into the top of the pistons that allow clearance for the valves if the belt breaks. Most engines are interference and will cause several hundred or even thousands of dollars of damage when a timing belt breaks. Most shop manuals list the ZX2 as interference but it is not. Many people seek out this how-to because a mechanic has informed them that they have valve damage and quoted a repair price over $1000.
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Re: 1999 escort zx2 timing belt broke
Yes this is possible, it is an interference engine, but there is a chance that it didn't (bang a valve), i've seen this have a good ending many times. so if you are replacing the belt your self go ahead and do it ,...you might have one of the lucky cars and it will run great.
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if you need it changed I seriously suggest that you take it to a reputable mechanic, especially if it's already broken. If the intake and exhaust valves are not in the right position when the piston is TDC, it will cause extensive damage.
This is a non-interference engine. Anyone saying anything different is using an old book. Some Ford dealers might even tell you it is interference. There are reliefs cut into the top of the pistons to clear the valves if the belt breaks. There is a how-to posted here and on Team ZX2 .com
Maybe not. Not all engine have an interference problem. Many wil be fine after the belt is replaced and the valve train is retimed. Was there a lot of noise? If the engine just stopped without much fanfare you are Ok. Check with your mechanic or dealer to be specific.
This is catastrophic for the engine and there will be damage beyond the inevitable bent valves. This is the cost of poor preventative maintenance. Rebuilding the engine will be expensive as will installing a replacement unit. Get some quotes but I suggest it's probably not worth it given the market value of the vehicle.
If timing belt broke when the engine was running then a belt wont fix your problem as when the belt brakes the valves stop straight away and the crankshaft will still turn over at least 4to6 times adn in that time could AND would bend a couple of valves at least.if
not a lot more problems BUT if you still go ahead with fitting the belt then all the casings are marked to fit the belt and the keyway in crankshaft is always at 12 oclock to start with.. Ron
a couple bent valves shouldnt be more then a few hundred dollars to have replacedand can be fixed yes, but also the vehicle has to have another timing chain ooput on and be retimed this will probably be a total cost of somewhere in the $800 dollar range (this is only an estimate!!) to replace your entire engine would cost substantially more and in all realit i would try to sell the opother vehicle for parts, trade in, or as a whole and buy another vehicle before i invested the money into a new engine for this particular car
cam shaft timing marks on back of cams ,two slots ,use a flat piece of metal to align .remove no1 spark plug and drop long thin screwdriver down it to bring piston just below tdc,then align cams so both cams are on the rock (valves closed) with knob on back cam aligning with pick up sensor left side between lobes.then bring piston up to tdc and fit belt.turn engine over twice with socket on bottom pulley to make sure no valves clear pistons.Remember to remove flat edge from back of cams i didnt last time and bent my home made tool