View Full Version : what should I do with my truck?

07-25-2010, 07:51 AM
Hey guys, I got a 1991 chevy cheyenne reg cab 2wd. It has a 4.3L v6 in it. I went to a mechanic and he said I should swap out the engine. Because I took it to him and the engine leaks oil like crazy. The mechanic took a look at it and said the whole bottom end of the engine is done. And it would be cheaper to get a used engine and do a swap.

How hard is it to do a swap like put a 350 in it or something along those lines. I will get a mechanic to do it for me.

07-25-2010, 03:37 PM
depending on how much the mech will charge you extra to do it i'd do the 350..there a dime a dozen as are the 4.3's though..the 350's of that era have around 200 hp and alot more torque then the 6cyl.

if the truck is in good shape i'd throw in the 5.7...if its a rust bucket with alot of little probs just buy a newer car...How many miles are on it, and by bottom end noise does he mean rod bearings? is it piston slap? does it burn oil, can you hear the noise, were is it leaking? oil pan? rear main seal. ect ect?

07-25-2010, 03:40 PM
buy a ford

07-25-2010, 03:53 PM
buy a ford

If we could neg rep here this would be one of those times

To the OP, I would go hit up a Chevy forum as they would have more knowledge on this topic.

07-25-2010, 03:53 PM
buy a ford

Funny, funny guy you are.

07-25-2010, 06:35 PM
like the whole bottom end of the engine is done. needs everything to be replaced on the bottom end. I could go through all the oil in the engine in a day. Leaks out pretty heavy.

07-30-2010, 01:10 PM
you need new motor mounts, a v8 chip for your computer a few more odds and ends but the transmission is the same 4L60

07-30-2010, 01:21 PM
swapping from a NBS 4.3 to a V8 (http://www.fullsizechevy.com/showthread.php?144116-swapping-from-a-NBS-4.3-to-a-V8)
this should help i helped a friend with a swap from a 5.3 to 5.7 (305 to 350) in his 99 and the link is for a 99-07 classic swap but it shouldnt be too different

08-01-2010, 04:26 PM
its easy if you aren't retarded you could do it yourself. Oh and park the truck.

08-01-2010, 07:10 PM
Just gotta pull the engine out some how. That's the only thing I can't do. I could prob do everything else and if I don't know just come on here.

08-01-2010, 07:19 PM
They make these things called cherry pickers...

08-01-2010, 07:20 PM
I would have to find one in my town lol. My city ***** for everything. Next city is 1 hour and 45 mins away.

08-01-2010, 07:25 PM
Find an Italian Chip for your truck if you want to fix it right......

08-01-2010, 07:42 PM
its not real hard since you got a throttle body motor

08-19-2010, 03:36 PM
Find an Italian Chip for your truck if you want to fix it right......
Nobody else got it i guess

09-18-2010, 01:06 AM
did you crawl under the truck and have a look for your self ?

if your engine is BURNING the oil - then yes its done.
but if its just leaking
it could be from a fiew problem areas - like the front and rear main seal would be terrible

did you crawl under there with a wrench and try and tighten up all the bolts holding on the oil pan and **** ?
check around for other areas leaking out oil... maby its something stupid like a oil preassure sensor that is leaking like a std

or maby the motor is done... investigate

09-18-2010, 03:50 AM
I had a mechanic and a person to look at it. Both of them said the bottom end was toast. Dunno how much it would cost to redo the whole bottom end. Doesn't burn oil.

09-18-2010, 03:53 AM
Hmmm. A leak does not signify the bottom end being "toast" at all. A leak is a leak. If you threw a rod through the pan and it was leaking that would be a different story. Get under there and see where it is leaking from. Most likely the rear main. You can just keep re adding oil....

09-18-2010, 04:25 AM
the oil drips right onto the front cross member. like not on the back of the engine in the middle. And you hear it knock when running. Sounds like it's gonna blow up if you give it some gas.

09-18-2010, 04:28 AM
u can easily find an engine, harness and trans, say an ls1 and replace it all.

usually junk yards have good deals, and craigslist has even better ones if u can find them.

09-18-2010, 04:36 AM
not when your in Northern BC where there is nothing good to be found lol. Not by any big cities. Like my city is almost by alaska.

11-27-2010, 08:46 AM
I agree........4.3s are not great engines for trucks
but for the dollar Id dump the whole truck , its too old
to put money into it...or seal it up yourself....