2000 VW Jetta: Timing Belt Popped & Bent Valves... Got Hope???
Timing belt popped in the middle of the highway at 121,000 miles. We had a new timing belt, serpentine belt, and water pump put in, before we learned that at least 2, may be 4 valves were bent (VW are very tightly tuned and depend on precision timing. When the timing belt breaks some valves may open into the combustion chamber at the wrong time, and they get crushed by the upward thrusting piston). See http://www.alldatadiy.com/techtips/Volkswagen/20050926b.html
We'd either have to redo the head, valves, and pistons, or replace the whole motor... or just get a new car. The fix could easily cost another $1000 - $2000, in addition to what we just paid, without any guarantees.
Finding If A Timing Belt Or Chain Is Worn.
Scotty Kilmer, mechanic for the last 45 years, shows how you can find out
if the timing belt or timing chain on your engine is worn. It's a
relatively expensive job replacing them, so you don't want to spend all
that money for nothing. It's a pretty simple job checking them for wear,
Once you know how to do it.
This is what it means when a timing belt breaks.The valves bend after they
hit the pistons.This is a test i use to determine
quickly if severe damage has occured.A shop may use vacuum or simply
rebuild the head as bent valves become obvious when refaceing them.Valves
of a small stem diameter may not leak as the valve spring pressure
pulls the valve straight enough to seal.
But after repeated cycles of opening the head of the valve will break of
destroying the engine.
Also the valve guides are usually cracked in KIA HYUNDAI heads and the
smalls pieces will go in the engine.I have seen guides cracked in all the
16 valve heads
Cylinder Head 201 - Radius Cut Valve Job
This video covers the complete valve job process that your machinist might
perform. If the 100 series videos didn't help you identify and correct a
problem with your cylinder head, then this is the next step. This video is
brought to you with permission from my machinist in full 1080HD, and covers
cleaning up the head inside and out, preparation and setting up a radius
cutter, cutting all 16 valve seats, valve grinding, and spans 3.5 hours of
actual work in under 30 minutes. There's nothing like this anywhere else
THANK YOU BALLOS PRECISION MACHINE. Thank you for the professional
explanation and execution of a job excellently-done, and un-precedented
access to your facilities.
A valve job is done by re-grinding or replacing valves, and then having new
seats cut to match the faces of the valves you're using. There are several
different machines that might be utilized to achieve this result, but the
process is the same no matter how it's done. There are seat cutters that
utilize cutting stones. There are valve seat cutters with 3 separate
angles installed 120° out-of-phase, and there are single cutters with all
3 angles (radius cutter) that cut with one blade in one pass. The machine
demonstrated here is a Sunnen VGS-20 Radius Cutter. This machine (now out
of production) produces a gradual curved seat that's superior to the shape
of a traditional 3-angle seat. While a radius cutter does contain the 30,
45 and 60 degree angles, it does so without leaving any sharp edges between
My valve selection includes Supertech 1mm oversized nitride-coated
stainless steel undercut and back-cut intake valves, and 1mm oversized
Inconel back-cut Exhaust valves.
Inconel is a high-temperature alloy utilized in marine and forced-induction
performance engines that can handle more abuse than steel can without
melting. The other characteristics of the valves which are discussed
typically yield bigger gains in airflow than simply using a bigger hole and
a bigger valve.
Why I did this to a perfectly-good cylinder head:
I changed cams. Because the valves were previously recessed during another
valve job 9 years ago, my valve installed height was increased and this
raised the operating positions of my rocker arms. My new camshaft
selection dictates using the stock valve install height. The only
solutions to this valve install height problem are to either replace the
valve seats, or install oversized valves. I opted for the latter.
Pruven Performance engine melt down 4 cracked pistons, 8 bent valves.
Pruven Performance screwed up brand new Evo IX after this run the car had 4
cracked pistons, 8 bent valves, warped head and a long list of issues car
had to be taken to AMS for a new engine and head.
Video of the way the car was picked up!
Timing Belt & Water Pump Replacement : Water Pump Replacement: Cam Shaft Sprocket
Carefully remove the car's cam shaft sprocket before removing the water
pump for replacement. Take off a cam shaft sprocket with tips from a
certified auto mechanic in this free video on car engine repairs.
Expert: Nathan McCullough
Bio: Nathan McCullough graduated from Nashville Auto-Diesel College with a
GPA of 3.5 and received their Craftsmanship Award and Honor Seal.
Filmmaker: Robert Rogers
First Cold Start of my Passat 1.8T after Timing Belt change
My car was really noisy lately, almost like a valve knock, plus it had
started overheating above RPM speeds above 1750. Those waterpumps were
unfortunately made out of plastic and were breaking off the shaft (my
case). So it was still spinning but slipping at higher speeds.. We realised
that my hydraulic tentioner was all the way at the end of it's course when
we removed the timing belt so the belt had a really big slack, and could
have easily jumped a tooth in the furture. Fortunately with lots ov LOVE
for a VW and patience, and with the help of my friend Marc (BMMRPT), We
managed to do a pretty good job.. il still puzzled why at TDC is my factory
timing off.. meh.. we put it that way and it runs REALLY nice.. so far.
Timing Belt - the Forgotten Belt (by Dayco)
Timing Belt - the Forgotten Belt. This video stresses the importance of
checking and following the manufacturers recommended replacement interval
for the timing belt. Along with recommendations to replace the "hardware"
associated with the Timing Belt (Tensioner, Water Pump, and Idler Pulleys)
at the same time the Timing Belt is being replaced. To find out more
information on our Timing Belt, Timing Belt Kit, Water Pump Kit, and Timing
Component Kit, visit www.daycoproducts.com
2000 VW Jetta Vr6 (0-60)
2000 VW Jetta Vr6 0-60 test
*We are not professional drivers, the iPhone Dyno App may or may not be a
completely reliable source, some of the cars in our tests do not have
completely stock engines. Knowing these three variables, our 0-60 times may
not be the actual times of the car.*
Thanks for watching
timing belt installation on a VW passat 1.9 TDI
cam belt installation on a VW passat 1.9 TDI using DAYCO TIMING BELT,
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