I've got nothing but praise for the old beast. Oh yeah, I forgot my family and I owned a farm in the 80's and 90's and we had a full size pickup with a 4. We hauled silage wagons and it never missed a beat. It did have a 4 speed with a granny-low so that prob helped. There is no telling how many tons of feed we hauled with it and it took all the abuse. They have some serious issues.
Injector, 1 cylinder ovaling out. Had one in my 91 Blazer and my brothers 92 Bravada. I was hoping the El was a 4. This regular cab Silverado is nearly perfect, 4WD is what would have made it perfect. I don't think they ever had good heads and you can't within reason hack and weld aluminum heads to fit. GM Performance had better heads for circle jerk racing back in the day, but that's long since dried up. Took me 2 hours to change the starter on a 99 4x4 4.
The TBI engines are boring, but super tough. The early vortech engines had a lot of CPI issues, among others. The later vortech engines don't have nearly as many problems with the fuel injection, but had rod bearings make out of play-doh, or something equally crappy. We swap out at least two a week where I work. I remember seeing a HotRod magazine article on a supercharger mated to a 4. I've been seeing them with bad bottom ends regularly myself. And not necessarily neglected or high mileage examples either.
It's a shame they don't make a 6-cylinder LSX. I had that Hot Rod article.. However, thats a supercharger. You know, that thing that's inefficient, doesnt have an intercooler, and is hard to change boost levels on. There are I like the 4. Skip the middle years unless you accept what you'll be getting into.
I also dont have much love for the later years did a motor in a '00 blazer in june.. Id go for the El Camino by far because its cooler. I dont think its any less capable of truck work than an s10 other than that it is less disposable.
As for the full size 4. They're alright to me, much easier to work on than the s10s, but also just reek of mediocrity and anonymity. It has an offset-throw crank, so the rods and rod bearings are 4. Other than that, and the timing set if it has a balance shaft and timing cover, pretty much yeah. I was recently entertaining the thought of a powered RX-7, and so I'd been doing research on the buggers.
Consensus was, just find a Vortec 4. I want an odd-fire V6 that you can have a snowball's chance of finding parts for, unlike an odd-fire Buick. Step 1: Actually try and locate an odd-fire Buick. I'm not kidding Crossbolted mains, rear block plate, front mounted oil pump But then, that doesn't make much sense on an iron block engine, that's a lot of additional weight for a little bit of leak prevention.
And the Gen IIIs do leak oil eventually at the valley. Have been seeing it more and more on vans. You'll need to log in to post. Log in. Login Digital Edition Buy a Subscription. Forums » Grassroots Motorsports » The Chevy 4. Most of the Chevys that the local SBC uses are 4.
First things first: if your engine has fuel injection, then toss your throttle body, computer and intake manifold into the trash and set it on fire.
The only decent induction systems for this engine are made for carbureted induction, and aftermarket computer-operated fuel injection just isn't worth the money if you're not installing a turbo. Intake manifold selection for this engine is pretty poor, but the ones that are out there are pretty good. Top your manifold off with a 2-inch carb spacer and a CFM carburetor.
Like intake manifolds, exhaust header selection is a bit thin. Hooker makes a set of decent full-length headers for the 4. If you get the Edelbrock Performer intake, you'd be best off getting their matching exhaust headers, which are designed to work in the same RPM range.
If you swap over to a carb, then you're going to have to swap in a new distributor to go with it. Fortunately, the standard GM HEI distributor used on V8s will swap over on most model years, and can be made to do so on all if you swap the cam out for an aftermarket one.
As far as heads go, you're pretty much stuck with the stock ones unless you feel like spending several thousand dollars on a racing set. Flow on even the best stock heads is pathetic; a good porting job and valve replacement are prerequisites for making anything over horsepower.
Fortunately, the 4. Just pick whichever set best suits your budget and compression requirements.
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