http://wv.craigslist.org/car/355793747.html
Owner states that it has been happening for over 20k miles on a Pontiac Bonneville.
2007-06-26 17:03:08 · 10 answers · asked by PlasticTrees 2 in Cars & Transportation ➔ Maintenance & Repairs
The listing also says that the supercharger (engine I guess?), was rebuilt within the last year.
2007-06-26 17:10:52 · update #1
The first thing i would do is try using Premium fuel. If its not that It might be a valve or a rocker or worst case a piston, any of those can be a pretty expensive fix.
2007-06-26 17:06:30 · answer #1 · answered by neverdugdisco 7 · 0⤊ 0⤋
This is a bad thing. It is a lifter rod and it means the engine is bad. It will just be a matter of time before that lemon kicks out on you. A new engine may cost $800-$1200. That normally is a pretty good engine if it is the 3800. Sounds like trouble it should not be knocking!
2007-06-27 00:16:37 · answer #2 · answered by ccnice1 5 · 0⤊ 0⤋
Rods or valves? Knocking generally means the engine could seize up at any time and to correct the problem would require removing and dismantling the engine.
2007-06-27 00:07:00 · answer #3 · answered by Anonymous · 0⤊ 0⤋
If it is a knocking keep on a looking.Don't buy it the car can not be that good of a deal you will be putting a lot more money in it and it will use a lot more gas if it is not working in the best of condition.
2007-06-27 00:13:24 · answer #4 · answered by JR2003 1 · 0⤊ 0⤋
going straight to the heart if its a loud knock coming from the bottom of the engine its probably a thrown rod bearing
2007-06-27 00:13:29 · answer #5 · answered by Daryl C 3 · 0⤊ 0⤋
The car seems to be a wreck. Unless it is super cheap, don't bother. There are many problems with it, not just a knock.
2007-06-27 00:09:19 · answer #6 · answered by ja 2 · 0⤊ 0⤋
Spun crank bearing. (knocking)
Lifter, or valves? = (tapping)
ADDED:
Could also be "detonation" in the cylinder from crappy gas, or incorrect ignition timing, or bad knock sensor.
2007-06-27 00:11:40 · answer #7 · answered by Mr. KnowItAll 7 · 0⤊ 0⤋
it could be anything from a $2 spark plug to a $2000 bad motor - don't buy it unless your willing to pay
2007-06-27 00:06:23 · answer #8 · answered by Shopaholic Chick 6 · 0⤊ 1⤋
please do not consider buying a vehicle that has a knocking engine. It is likely that you hear worn lifters knocking and you don't want that headache
2007-06-27 00:07:17 · answer #9 · answered by Anonymous · 0⤊ 0⤋
need oil or pistons are shot?
2007-06-27 00:07:04 · answer #10 · answered by Anonymous · 0⤊ 0⤋