ya so a week ago or so i was topping off wiper fluid, checked my oil and everything for that rochester meet.

then today, i pop the hood and hose it down, just a general wash down, nothing too picky, when i notice my oil cap missing. Now. It was there last time i had the hood open, and its gone today.

Now. the truck has been running fine, no problems at all.

However, I KNOW water got into that lil hole, prolly not much, maybe 1/4 a cup. but still Im gonna change the oil and filter.... anything elese i can do?

 

changing the oil and filter is about all you can do....

 

how bout a bottle of sea foam in the oil?

 

i wouldn't run the truck at all......change the oil........use cheap oil and filter....let the truck run for a bit and then drain the cheap oil and replace it with your normal oil and filter......

 

btw, what size is the nut for the oil pan?

 

i have no idea off the top of my head......

 

im going to say 15mm, thats what mine is, i have no idea what size it is on a 4.0.

 

just fyi, remember oil and water seperate, they don't mix. Use that to your advantage.

 

I would change the oil with cheap dyno oil, then change it again after 50 miles or so with whatever you normally use.

 

I would change the oil like everyone said then when you go to fill it up with the new stuff pour it in with no oil plug so you can push everything out with the new oil. I'm sure a quart or 2 will do it. Yes your waisting good oil but its better than getting a new engine.

 

allright, now i drained the oil. and i put a couple qts in with no plug as well. its draining now. then ima put new oil in it, and then run it for a day and then drain and change it tomarrow.

now, where to get a cap?

 

Bone yard or the dealer...

 

junk yard.....dealership will charge you an arm and a leg and take a couple days...

 

Local Parts store...

 

Duct tape it until you get a real one.

 

Can pick them at any auto parts store. Usually have a book that tells you the model no. you need and it's like $5.

 

parts stores have oil caps, on my 4.0 the drain plug is 13mm

 

I was going to say 13mm too... and parts stores have oil caps in stock...

Rocky

 

Hey uhh I was thinking, what if he parked his truck inside with the oil cap off and a heater running for for a day or two? like, get the garage really hot (but obviously nowhere near a dangerous level, altho it isn't easy to light oil on fire).


Because all the water is going to seperate to the top of his oil and draining it isn't going to get that water too well. But he could force a lot of the water to evaporate out of his engine.

 

I wouldn't do that, unless his house isn't attached to the garage, because of exhaust gases, but I still wouldn't do it. besides, I dont think the engine will get any hotter by doing that...it gets pretty freakin hot just running at operating temp.

 

alright, i got it back together, gonna head to a job interveiw and then to my buddies to get my cap. right now i used an old beer can, cut it in half and then taped it to the filler tube with HVAC tape. I thought about duct tape, but I was afraid it would melt. i also poked a hole in the beer can to let any moisture out.

 

Noo. The furnace. If he ran his engine the oil and water would just mix up real quickly.

 

my thinking is i really doubt you got a bunch of water in it.

change your oil like you did and do it again in a few days you will be fine.

 

oohhh. lol I thought you was talking about the heater in his truck...i was like, what does that have to do with it. lol

 

I always do 2 flushes if I ever get water in.