John Norvaisas: Can i use fiber lock in my 1997 BMW 740il?
Viet Hoang-Tran: Something doesn't make sense about this video explaining fiberlock.
This fiberlock gets mixed into the coolant and flows through the system
until it goes into a "leak". The video states that "air in the cooling
system passes over the patch" but why would there be air in the cooling
system? Aren't cooling system bled of air? How does the fiberlock know to
"seal" a leak versus "seal" a thermostat or radiator or coolant jacket?
Edwin Potts: JUNK...now to fight to get my money back and take my radiator out to unclog
Lei Yan: Don't use it. Its just crap. Clogged my cooling system. My car get
overheated. Can't even drive it.
Ahmed Marouf: I used K&W Fiberlock for my 2006 Kia Spectra, and the result is
unbelievable. It stopped the air bubbling COMPELETLY within two days. I
highly recommend this product. Thank you K&W to make me safe hundreds of
dollars in replacing the gasket.
arabiantxn: Read all the reviews read all the review. unfortunately i am not happy ,
arabiantxn: Good luck this product didn't work for me.
Part of the coolant was drained , this product was directly added along
with coolant directly to radiator. K&W FiberLock didn't work for me
cost (autozone ) $35.99
2003 infiniti G35 v6 3.5
CRCAuto: Mr. Crane, We are sorry you are dissatisfied with your results after using
K&W FiberLock®. We have thousands of satisfied customers for whom the
product saves them from costly head gasket repair. If you would like to
discuss the specifics of your experience, please call our Technical Support
Line at 1-800-521-3168. You may also call our offices for a refund form, as
FiberLock has a double your money back guarantee. 1-800-556-5074. Thank
Jeremy Crane: Blocked all my coolant ports so my car runs hot in record time... matter of
fact about 1 mile down the road is all it took to blow off ny top coolant
hose, if you decide to use this product be sure to flush your system out
soon after you do it and change oil IMMEDIATELY!!! I wish I had just
changed my headgasket in the first place, oh yeah I almost forgot... my
heater core is blocked beyond belief so when the winter comes ill be pissed
beyond belief... my car is a 1989 ltd crown vic with the 5.0
marco33717: can I use this on my turbo car??
Snc: Is it better to add it when the car is cold and then warm it up after it's
poured in? Or get the car to full operating temperate and then add it?
fcrespomt82: How use in a cadillac deville with problems head gasket
Kelvin Smith: Would this work for my northstar v8 engine?
Sergio Sierra: I just got your product today, Do this work for an Chrysler 300c 5.7 hemi
Tom Taylor: My coolant is not leaking after adding fiberlock, but the car is
overheating. It had a new thermostat and water pump before adding the
fiberlock. Any ideas on what to do next?
Azhr M: This K&w will clog you radiator, resivoier and every small coolant passage
then you're looking at more things to fix. I tried K&w few times never
worked but added to the problem. I had better luck with blue devil. If you
have northstar engine or mercedes or any engine has open cylinder wall
nothing will fix it other then making new bolts (time-sert) and new head
gasket. But if you have steal block and straight no double cylinder then
the blue divl will most likely fix it.
david thomas: check you cooling fans could be a fan relay
CRCAuto: Hi Kelvin - the short answer is yes, however it depends on the type of
problems you're experiencing. We recommend you call our Tech Line at
1-800-521-3168 to discuss your specific issues and we'll steer you in the
right direction. Thanks!
lampson1986: I used FiberLock to stop a coolant leak. So far after running the car for
15 minutes, it looked good at idle, until I revved the engine, then the
leak game back. I'm going to wait a little while to see if it helps, and
try and rev the car again. So far not impressed, however its doing a better
job than Bar's stop leak.
CRCAuto: Sorry it took a while to respond. If you haven't tried the product already,
here's the best way to install: The vehicle should be cold to start. Remove
radiator cap, then start the vehicle. With engine idling, shake FiberLock
vigorously and pour 1/3 of the bottle very slowly into your cooling system.
If the leak persists for more than a day, slowly add a second dose per the
treatment ratio for your vehicle. Call 1-800-521-3168 if you have specific
How to Use K&W FiberLock from CRC to Fix a Coolant Leak4.1
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