Loud knocking after truck sat for 4 days

Like the title states. I've not been driving my truck since I determined that my coolant leak was coming from the water pump, reservoir emptying after of couple days, that I'd drive my car while I determine whether or not my Daddy and I are going to do the repair or cough up $1000 for my trusted mechanic to do it. I had to make a quick trip to the UPS store so I decided to drive the truck. When I cranked it up there was a very distinct knock coming from the engine. I couldn't pinpoint where but it became more faint as the truck idled. While driving I didn't hear anything even at WOT.

What do you all think that was?

 

Do you mean Loud or indeed Load ?

In any case, what type oil are you using and when was last time it was changed.
Also, do you still practice the same as you've mentioned in other posts ?

After sitting awhile and on first start, I can believe it might take a bit took circulate oil into all the passage ways. If it makes that noise every time every day, that's a different story.

 

Automotive stethoscope can help pinpoint noises in the engine bay. Are you sure the water pump is the source of coolant loss?

If you’re hearing funny knocking sounds coming from the engine, don’t drive it WOT. Especially if you haven’t determined what it is. Have you tried to restart the engine cold since then?

 

Sorry! Yes..."Load"

I use 5w-30 and I change the oil and filter as soon as the maintenance light comes on.

I use whatever synthetic blend is on sale. It's all the same as long as it has that "API Donut" stamp.

 

If you follow the black bar at the top of your 1st comment in this post, all the way over to the #1 in the top corner of that comment, there's a button above it, "Thread Tools" (but only for you, the thread creator). You can click on that to Edit the Title or whatever, fix your typo. May help with others reading later.

 

The noise faded to nothing in about 5 minutes. I didn't go WOT once I pulled out of the driveway. I didn't hear anything but my Thrush mufflers

Yes I restarted it again... nothing.

 

Thanks! I knew how to edit the post but I didn't see how to edit the title...please standby while I make the correction.

Dude I've been on this forum for years and didn't know that!!!! Well damn!!!!

 

So just the single episode of knocking after sitting for 4 days. If it doesn’t pop up again, it may forever remain a mystery….

 

Yeah, it's pretty handy to know if you post things over in the 1st gen marketplace.

Yup. Maybe just bad gas? Someone pissed in OP's tank?

 

If you feel froggy and wanta learn more, head to your profile and add some specs about your 1st Gen on the “Vehicle one-line Description” line….ENG(V6/V8), Type(SR5, Limited), CAB(Reg/AC/DC)….etc or at least put it in your initial post when asking for assistance. Various things different on each year.

https://www.tundras.com/account/personal-details

 

Oil drained down from setting once it was started oil pumped up and stopped knocking. Just my thought

 

My 2000 will sit for days if not a week or more at times and does not do this.

 

My truck hasn't been cranked since yesterday evening...just remote started it while standing by the hood. Absolutely nothing! Oh well!