Question about 2004 Volkswagen Polo 1.4

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Engine timing Timing belt replaced after it snapped but vehicle still does not start. Valves been checked and still okay. What else can be wrong.

Posted by Anonymous on

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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: vw polo Broken timming Belt

Did you check the compression? If the compression is low then the most probable cause is the valves bent. Means the head has to come off.
If the compression is ok then have you got the HT leads on the right way or is the ignition timing ok. Check the resistance in the leads they have a tendancy to break down.

Posted on Nov 14, 2008

  • 2920 Answers

SOURCE: Timing Belt Broke. 2002 Volkswagen Passat . Time for a new car?

i would go with the mechanics advice and allow them to fix it. 1200 to 1500 beats spending 4000 on another motor if that one can be saved

Posted on Jan 26, 2009

  • 534 Answers

SOURCE: no compression 2003 jetta 1.8L Turbo

Either the camshaft are seriously out of time or the piston rings/pistons are worn out.
Check TDC of Piston No1 on the power stroke coincides with both inlet and exhaust valves being closed.

Posted on Oct 09, 2009

  • 119 Answers

SOURCE: 2000 VW passat timing belt replacement

80 000miles(120 000km) is recomended by the dealer but it's safer at 40 000miles(60 000km) its safer for town driving and cold conditions considering the diffirence between a cambelt change and a replacemnet engine and downtime.

Posted on Feb 02, 2010

kirkx
  • 2019 Answers

SOURCE: 03 jetta tdi timing belt broke

The number of miles is not relevant, because in 7 years of driving, obviously it was mostly highway miles and caused little wear.

It only takes about an hour to try just changing the belt. You need to buy a belt anyway. So it is always worth the attempt.
Most VW's have small depressions in the pistons for the valves, to prevent anything serious.

But no, I do not believe the TDI even is an interference fit.
Only the DOHC GTI engine was even close. I do not believe the TDI had a dual cam version, nor was any Jetta dual cam. And it is only with dual cam that the valves hit, because they are on such a hemisherical angle.

Posted on Feb 26, 2010

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4 Answers

Trying to replace broken timing belt. Trying to set #1 cyl. to TDC manually. no compression reading on 1 &4, readings on 2 & 3. What could cause this?? HELP!!


Hole in the piston crown is the worst Charles, but let's not be pessimistic :>(

More likely valves open. At TDC firing stroke both inlet and exhaust valves should be closed. The flat, low part of the cam should be on the followers. So 1 and 4 have valves open, 2 and 3 are closed. If you turn the cam 180 degrees, you should have compression on 1 and 4 and no compression on 2 and 3.

The other thing though, is that when the timing belt breaks, the valves are often in the wrong place at the wrong time and can often meet the piston head on. This can bend the valves. or damage the piston. The normal advice is to remove the cylinder head to check, and then service the valves whilst you have it apart.

A job like this, you need a workshop manual.

May 18, 2016 | 1999 Toyota Camry

1 Answer

How much fuel pressure do I have to have before it will start,


If the car started and ran fine before the serpentine belt broke - that may be the answer to your problem.

If the belt also controls the valve timing (not the ignition timing, which is a different thing) the valve timing has probably altered. You will have to reset the valve timing using the timing marks for your vehicle.

In a worst case scenario, a snapped timing belt can allow the pistons to hit the valves and damage them. If this is the case your engine isn't going to fire up.

If you're not sure what to look for or do - give a mobile mechanic a call

Jan 22, 2016 | Cars & Trucks

1 Answer

My timing chain has snapped


I assume it's your timing belt, not a chain, which rarely, if ever snap. Depending on the make of the car and the engine you may, or may not, have serious engine damage.. DO NOT ATTEMPT to start the car, have it towed to your shop of choice. If there is no engine damage a timing belt replacement generally will run you 2 or 3 hundred bucks...if you did serious engine damage you may have to decide if the car if worth the money to have it repaired. What you need to know is whether your car has an "interference" or "non-interference" type engine.. In an interference type engine if the timing belt breaks the valves will "interfere" with the pistons as they travel up if the timing belt breaks, which results in generally catastrophic engine failure.. non-interference engines generally suffer little or no engine damage with a broken timing belt.. I broke a timing belt on my 1990 Toyota Supra going 70mph, but it was a non-interference engine and after having the belt replaced it was fine.. here is a good list someone put together on what type of engine is in your car.. you should find the engine type either marked on the engine or on a label under the hood, or the owners manual.. good luck. http://yourcarangel.com/2014/07/interference-engines-complete-list/

Sep 27, 2015 | Cars & Trucks

2 Answers

I ve just changed water pump,the battery was weak friend pull the car to kickstart while trying to kickstart timing belt brakes while car is in motion but not idling,what went wrong in the engine?help


Depends on whether you have an "interference" or "noninterference" engine. Since you do not mention what you are working on, impossible to know. If noninterference engine, just replace belt after lining up crank and cam(s). If interference, you may have heard bad noises as belt broke, and could have bent valves or even damaged pistons.

Jul 02, 2015 | Cars & Trucks

1 Answer

Engine timing


send mail at tcifusion@yahoo.com including engine code number

Apr 16, 2014 | 2004 Volkswagen Polo 1.4

1 Answer

1991 2.5 transit snapped it timing belt, replaced belt fitted new pushrods, but when i try to manually turn engine over i cant get it to do a whole revolution, it stops with a loud hard knocking (sounds...


usually when the timing belt snaps it damages the valves also you have to get the head valves checked for damage if they are damaged its $$$ you have to replace if the head is not broken also
if so
you need to replace the valves
valve guaides
valve seals
and get it valve grinding

it has to go to a workshop dont try to crank the engine again as if something saved will be saved
but if you keep trying you can damage more parts

Feb 07, 2011 | Ford Transit Connect Cars & Trucks

2 Answers

My lanos snapped its timing belt and i have replaced it but it is still running a little ruff its like its putting and verry sluggish


it sounds like the timing is off
when you replace a timing belt after it has snapped you risk internal engine damage-i would start by checking the timing-the belt may be on wrong-if that is not the problem you may be looking at a new engine

Feb 16, 2010 | 2000 Daewoo Lanos

2 Answers

Timing belt is broken. Interference or non interference motor?


Most Ford vehicles from 1985 and up have enough valve clearence so the valves do not get hit when the timing belt snaps. Since I worked for ford for many years I have only seen one with valve damage and the youg man said he was driving his car really hard at high RPM's. I believe you will be okay on your engine as long as when the belt broke the engine was not at high rpm's. If know one has told you those engine recommend a timing belt replacement every 60k. I hpe this helped and I hope this fixes your problem. Good luck, Roger

Feb 10, 2010 | 2000 Ford Focus

3 Answers

My timing belt in my 98 Daewoo Lanos snapped recently and the mechanic i took it to told me there was no need to check to see if there was any damage inside the engine because daewoo motors always drop...


yes they bend valves
head needs to come off and valves will need replacing
this can be repaired
timming belts on these should be replaced every 60,000km

Jun 26, 2009 | 1999 Daewoo Lanos

1 Answer

Broken Cylinder head valves


sounds like your timing belt may have slipped or snapped a ceased timing belt adjuster could cause this check your timing belt and adjuster and all belt adjustment pulleys before you fix the valves otherwise its bound to happen againalso make sure your engine oil is full

Jun 11, 2008 | 2000 Volkswagen Jetta TDI

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