Recieving quotes from 4000-7000. can get rebuilt longblk. from kragen for 3040. Really cant afford that right now.Want to do a crank kit so i can get as much milage as possible before i have to rebuild it.Any recomendations or tips, such as.... change oil pump, use synthetic oil.... and so on.
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Re: continued question,spun bearing...
It would not Hurt to Change the Oil Pump But, You Probably do not need to. Use Valvoline Full Synthetic 10-40. If you have no other Problems with it right now Do not Change anything, Just do the Crank kit and it will be Fine.
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Main bearing replacement (there are four main bearings in your V6 engine) is MAJOR work. The engine must be removed from the vehicle and almost completely disassembled to get to the main bearings. If the bearings have 'spun' (likely), the engine will require machining to correct.
Unless you have a LOT of mechanical experience, this is not something a DIYer will be able to do. I'd strongly recommend getting a rebuilt engine and have it installed, if the van is worth keeping. It will probably be cheaper than having yours repaired.
You are up for an engine rebuild. Remove the engine and turn up side down in a stand. Remove the sump and find the failed bearing by taking off the big end caps. If you find a con rod damaged you will have to remove the head and that piston and replace the con rod. If it is a main bearing that has spun you should only have to replace the crank shaft and fit new bearing shells Either way you will need another crank shaft. Check the price of a low mileage engine from a wrecker as it will be quicker and possible cheaper in the long run
I'm not sure where your knock is coming from, but If you rev your engine up and the knock becomes faster and louder you may have a bad rod bearing. If this is the case and you haven't ran your engine too much it is possible to put a new set of bearings in it and you'll be ready to go. But it is possible that you have spun a bearing and the crank would be ruined. Hope that's not where your knock is. Hope this helps, Jeff Horton
Engine noises are hard to diagnose when following a description.
Have you tried a stethoscope or a socket extension pressed against the pan to isolate the location?
It is possible a crankshaft bearing or a connecting rod bearing has spun or is scored. If you can confirm the noise is in the bottom end of the engine and its approximate position it's time to remove the caps looking for a failed bearing.
The block transmits noises very efficiently so be sure the noise is not being transferred from a different location.
Spun bearing = time for engine rebuilt. Sounds like your engine spun a crank shaft bearing or connecting rod pin is loose or worn out. If your lucky, it may just be a worn distributor gear that is causing your knocking due to bad timing.
Good luck and try not to run the engine with the knocking, it may be a simple fix that will lead to a major problem.
Thank you for using fixya and is the engine oil level right where it suppose to be???
You are right about the connecting rod bearing being a possibilty. The smaller sound you hear could be the pistopn contacted the head, which can happen if the con-rod bearing has failed. If it were the flex plate, the sound would be coming from the rear of the engine and would change when you put the transission into drive. If you have little money, you had better start saving. I would not even start the engine, Drain out the engine oil and check it for metal particles. You may have to remove the sump to really see what's going on, but the oil, if contaminated with fine metal is a good pointer.
you really cant rebuild these engines without special knowledge. buy a remanufactued engine or have yours rebuilt by a qualified local machine shop. Can you afford a mistake that would cost you another engine?
you can fix it. you shouldn't drive the car anymore to prevent damaging other parts. it sounds like a spun bearing, which is cause when the bearing doesn't recieve enough oil. the bearings are usually in a fixed position with the crankshaft rotating between them. the knocking noise is from the bearing wearing down from lack of oil, and they start rotating with the crank.
it might not be worth fixing because the cost of fixing it may be more than what the car is worth.