How Do I Know What Engine Is In My Truck?

35

Asked by May 26, 2012 at 05:40 PM about the 1998 Chevrolet C/K 1500 Cheyenne Extended Cab SB

Question type: General

So I just traded my 1998 Dodge Dakota Sport for a 1998 Chevy Cheyenne 1500 4x4. The kid I got it from said it had a 305 from
the factory but somewhere down the road a 350 replaced the 305. My question is how do I know if it's a Vortec 350 or an older
GM 350? I'm a gear head so dont be afraid to use technical terms haha

49 Answers

395

The 305 engine was pretty much gone out of GM's line up by 1988, as the throttle body EFI 350's were introduced. I have a 1988 Cheyenne 2500 4x4 & it came with a 350 EFI engine. In '98, the engine was either a V-6 or a 350 Vortec, as the Vortecs were introduced in '96. The intake runner should say "Vortec" right on it. Does your truck have an emissions decal under the hood anywhere? That will tell you what engine came in the truck from the factory, but I'm 99.9% sure it NEVER came with a 305. You can always get the casting #'s off the block & find out that way too.

9 out of 9 people think this is helpful.

just look at the engine code on the front of the engine under the passenger side head

10 out of 10 people think this is helpful.
16,255

In 98 they had a 5.0l V8 which is a 305 standard in the trucks, it was a vortec and produced 230 hp. There was also a vortec 5.7l (350)

11 out of 11 people think this is helpful.
1,655

the factory engine by the VIN # is the 8TH digit a 350 is a "R"

23 out of 23 people think this is helpful.
395

I stand corrected, but I've seen many of these trucks from the early to mid '90's, and NEVER seen a 305, they were either 350's or v-6's. Maybe here in MT, we never got any shipped this way.. Honestly, I've never even heard of one being used in a 90's vehicle & I know 3 GM mechanics. Maybe the 305 was an option & not a standard engine???

395

Sorry Quinton, for the mis-information! The 305 was in production until the early 2000's, just weren't any that I seen here in MT!

16,255

Oh. I think we totally missed the question. He wants to know how to tell if the engine is a vortec or not. If it is a vortec 350 the head bolta to the intake will be straight up and down, and there should be 4. On a non vortec there will be 6 and they are angled. Also vortecs use the spider injector setup and older fuel injection used tbi

15 out of 15 people think this is helpful.
Best Answer
30

I got a 96 Cheyenne and its got a 5.0 305 V8

3 out of 3 people think this is helpful.
20

Weren't all vortec heads center bolted, and non-vortec perimeter bolted?

2 out of 2 people think this is helpful.
100

Hi guys hope you can help me I have 350 out of a 1988 can i use the short block from it and use heads and manifold off 350 vortec in 1996 pickup and it work okay??

6 out of 6 people think this is helpful.
100

Andrew answered it above sorry fidnt read all. Bolt holes would have to be drilled

16,255

The heads and intake will bolt onto the block just fine. the important part is to always have the matching heads and intake.

1 out of 1 people think this is helpful.
100

I have matching heads and manifold I see people talking about knock sensors do i have to mess with that and timing gears and different camshaft ??

3 out of 3 people think this is helpful.
16,255

The cam will be whimsy compared to the vortec one. Still use able just less power. I'm not sure about the knock sensor, now that I think about it they will probably be different

1 out of 1 people think this is helpful.
100

I was thinking just swap all sensors anyway will timing gears be ok or should i swap that also

16,255

They have different timing sets

2 out of 2 people think this is helpful.
100

Ok will swap it all thankyou

1 out of 1 people think this is helpful.
60

I have a question my truck has no motor and I don't know if it was a 350 vortec or if it was just regular 350 if I'm replacing the whole motor anyway does it matter what I put in it or would I have to replace brain to do so please help I'm new at this

6 out of 6 people think this is helpful.
16,255

96+ used the vortec motor. 86-95 used the tbi motor and anything older was just a carbed motor

4 out of 4 people think this is helpful.

take vin number to parts guy at dealer or just call them with it and they will tell you what motor came with your truck just from vin number. .

190

Question ? I have a 95 with the tbi.5.7 L. What do I have to change to throw a vortec 5.7L in it?

6 out of 6 people think this is helpful.
16,255

Fuel pump, the vortec pcm. The trans is tricky. The vortec pcm won't run the 95 4l60e well. You could take the newer transmission or keep the old pcm as well and use it for only the trans. The trans will bolt up, it's the electronics are different. If you have a manual ignore what I said

2 out of 2 people think this is helpful.
30

Question- have a 96 k1500, 350/5.7... looking at a c2500 parts truck. Will the 8th vin digit R be the only thing I need to know? Bolt right up? Does that change trans, etc..?

2 out of 2 people think this is helpful.
16,255

Make sure it's a 96+ as 95 and older won't work

30

Right, 96-99 is the "long block". Guess I'm asking if the k1500 vs c2500 changes anything (besides frame and 4x4) as far as just slapping it back together goes.. motor mounts, etc..? Need the (z71) to move ASAP!

1 out of 1 people think this is helpful.
16,255

Oil pan is different

30

I have a 95 gmc ext. cab. Vin 2GTEC19.K7S1587408. Could you tell what exact motor came with it? Also which others will fit? I would appreciate it as I am new to this and

2 out of 2 people think this is helpful.
190

it should tell you when you pop the hood right above the radiator. Should be a white sticker about a inch and a half square that has the motel size printed on it. But should be a 4.3 v6 or a 5.7 v8

30

Sticker is gone and it is v8 but does that mean its the vortec?

30

I bought the truck from a guy who was also clueless and the motor is really strong and I'm not a mechanic but seems its more than the usual is why im asking

190

No its not. It's tbi only, or it should be. I believe vortec didn't come out in the 1500 till 96. but it could have had some work done to it. but you could run the numbers next time you pull th e engine

190

Oh. I think we totally missed the question. He wants to know how to tell if the engine is a vortec or not. If it is a vortec 350 the head bolta to the intake will be straight up and down, and there should be 4. On a non vortec there will be 6 and they are angled. Also vortecs use the spider injector setup and older fuel injection used tbi

190

Andrew posted that a up th ere somewhere

30

Could you tell me what all v8 motors would fit in that specific truck?? That would be nice knowledge to know.

190

Anything with a carb or tbi. stay away from vortec heads And intake. but I thought you said it ran strong?

1 out of 1 people think this is helpful.
30

It does have a carburetor. Oh it runs strong Im just curious of all the possibilities the motor could be by asking you vehicle wizards. Im also considering buying a 93

1 out of 1 people think this is helpful.
30

To put the motor in( because of the body)...Will it fit the 93??

30

I had a blonde moment. Its tbi. Sits underneath air breather

10

Hi I'm Ryan i have an 88 k1500 with the efi 350 and a few of you have said you have never seen a 305 in these models but my freind has a 92 With a 305 from factory the only 100 percent way to tell what engine you have is to look on the back of the engine block

1 out of 1 people think this is helpful.
30

I have a 96 chevy k1500 with a 5.0 vortec the motor is knocking and I have a 5.7 out of a 95 gmc suburban can I put my heads and intake on that motor and put it in my truck or is there other things I would have to change

3 out of 3 people think this is helpful.

Is it possible to put a 96+ vortec engine in a 95 chevy silverado 1500 4x4? Is that a good idea rather than using the stock 95 350? I'm new to this

16,255

Good yes, you have to get a special intake to bolt on your tbi. It won't be just drop in and go but will be more powerful

30

I jus bout a 98 Silverado its got the 5.0 are they good motors

3 out of 3 people think this is helpful.
10

Hey guys i got a question. I have a 96 motor in my 97 body bc i swapped motors when i swapped trucks.. I have the vortec 350 for sure but my motor went bad. I could have another motor lined up but its out of a 95 chevy. Would i be able to put the 95 chevy motor in my truck with a faily direct bolt in?

1 out of 1 people think this is helpful.
16,255

The 95 motor will be a tbi and not a vortec. You could use your heads and intake but you would have vary high compression as the pistons in the vortec are dished more than the tbi. I'd suggest finding another motor

This question is for Andrew. "What are some quick tips or best practices you have found with these 5.7 litre350 motors

And to help guide the question. My example is..... for a dodge 4.7 if you ever swap the heads, Lets say out of the "junk yard" the cam gear wheel plate that the cam has that the cam sensor reads has to match the crank plate on the block because dodge produced two sets of these and if they are not the matching pair the sensors(both the crank and cam sensor) will not read the sam firing order and the truck wont start... (saves you lots of time and money if you would know this tip)so is there any tips like this dodge example that we should all know about with these 4th generation 350 chevys?!

i have a 97 c1500 vortec is it a 5.3 or a 5.7?

My VIN says 1GCEK19R3TE245034 in my 1996 chevy 1500 5.7 liter 350..when I decode the vin it says it is a 6 Li V8.....as far as we know the engine has never been changed....any info on how this is would be helpful..second question...we are changing it out...without tearing it all apart would we be looking for a 2 bolt or a 4 bolt???

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