89shithatch

Just picked up a 98 s10 zr2. Just wondering what you think of the 4.3 engines with the vortec heads. I would like to stick with the v6 but possibly build it.

Tom-Guy

The cranks are incorrectly cross drilled and tend to trash rod bearings. There is no fix for this except to listen for rap at cold startup + after oil changes, and when it sounds really bad yank the engine partially out so you can get the oilpan clear of the subframe and toss some rod bearings in that bitch.

They get the same mpg as the 350, but only make 3/4 the power.

I'd try to flip the truck for a profit is my $0.02. Nothing really wrong with those trucks... but there is definitely nothing right about them either.

89shithatch

i bought it for a daily driver. i know it may be stupid because this truck has shity gas mileage. But i feel way to cramped in my eg that i used to commute. My dad has had a blazer and i have had one also. Both had high mileage and ran good. Never heard of the rod bearing mishap though.

Tom-Guy

It's about like an F-series, those engines trash rod bearings at 150-170K like clockwork. The difference between a 4.3 and an F22/F23 is you can find an F-series cheap, and it is easy to swap.

chriskuipers

Ive had a 93 blazer for over a year now i get like 20 mpg in town and it has like 265,000 miles on it and i beat the ---- out of it. its the best $500 car ive owed.

seerex

Hey Jd what do you think about the 6.0 vortec engine that came in the 03 yukons?

HondaTuner

I'm very surprised Buk hasnt come in here yet.

I don't know ---- about reliability and all that but it has some *****, did some nice peely burnouts with my friends grandma's blazer w/ a 4.3L 4wd

N1ghtM0nkey

My Business Law teacher swears by these engines, he says they're some of the best engines ever made.

I still swear by B and D series motors, and I think we can all agree on that. K series not so much.

Smith-02

what to do with gm 4.3's?

because a trash can won't hold that much ----:

sailman

my shop van is a 97 astro van with 438xxxkms on the origional 4.3 vortec and runs like a champ