4.3 h.o vortex good or bad?

[HopinImFloatin]

Re: 4.3 h.o vortex good or bad?

please correct me if i am wrong, and i may very well be, but dont the vortec engines use 8 bolt intakes? afaik all automotive ones were unless some of the real early ones were 12. Unless marine applications are different. Just curious, i may need one in the future.

 

[JasonGS]

Re: 4.3 h.o vortex good or bad?

I have never serviced and i/o how do you do it?

 

[bruceb58]

Re: 4.3 h.o vortex good or bad?

please correct me if i am wrong, and i may very well be, but dont the vortec engines use 8 bolt intakes?

OP never said he had a Vortec engine.

 

[Don S]

Re: 4.3 h.o vortex good or bad?

I have never serviced and i/o how do you do it?

Spend some time reading the different sections here http://forums.iboats.com/showthread.php?t=288430

Then you will have a better idea of what needs to be done. Especially items 5 and 6. They cover much of what you need to do.

 

[bruceb58]

Re: 4.3 h.o vortex good or bad?

And read this web site:

http://www.hastings.org/~stuart/cobra/

 

[JasonGS]

Re: 4.3 h.o vortex good or bad?

How can i find out what motor I have? Because the number i get off the block matches up with the vortex motor...

 

[HT32BSX115]

Re: 4.3 h.o vortex good or bad?

You didn't post pictures of the drive but the first picture does show you have the older dog clutch Cobra and not the newer Volvo style SX. That's too bad.

Yeah. It's also not a 94 model either. The 94's were the cone-clutch models..........So the presence of the ESA and shift actuator indicates it's a Dog-clutch model according to the BRP parts site, it would be a PRE-94 model. (93 or earlier if someone has done some swapping in previous years)

I have never serviced and i/o how do you do it?

You need to get an OEM OMC service manual (on ebay, craigslist, etc)

Do a little reading. A dog-clutch Cobra MUST be serviced (with oil) using the correct re-fill procedure or you will destroy the drive.

 

[bruceb58]

Re: 4.3 h.o vortex good or bad?

How can i find out what motor I have? Because the number i get off the block matches up with the vortex motor...

Vortex or Vortec? GM called all of the 4.3L Vortex. True Vortec heads weren't put on GM engines until 1995.

 

[QC]

Re: 4.3 h.o vortex good or bad?

This History is good too:

http://www.glmmarine.com/30yearsomc.html

 

[HT32BSX115]

Re: 4.3 h.o vortex good or bad?

Also look for your model number.

It will look like the following from BRP........ http://epc.brp.com/

Most likely one of the below model numbers......


432APLJVB 1993
432APLJVN 1993
432APRJVB 1993
432APRJVN 1993
434APLJVB 1993
434APLJVN 1993
434APRJVB 1993
434APRJVN 1993

 

[JasonGS]

Re: 4.3 h.o vortex good or bad?

How can i tell what kind of motor i have? I found the block casting number and it came up with the vortec motor.

 

[bruceb58]

Re: 4.3 h.o vortex good or bad?

How can i tell what kind of motor i have? I found the block casting number and it came up with the vortec motor.

Please show us a link how you determined this.

Your intake manifold have 8 or 12 bolts holding it down? 12 = non-vortec. Actually, I can tell from your pictures that you don't have Vortec heads.

http://www.chevymania.com/tech/vortec.htm


Look on the transom assembly for the model number. Should look like what Rick posted earlier.

 

[JasonGS]

Re: 4.3 h.o vortex good or bad?

How much HP am i looking at?

 

[Bondo]

Re: 4.3 h.o vortex good or bad?

How much HP am i looking at?

Ayuh,.... 'bout a couple hundred,... 205....

 

[JasonGS]

Re: 4.3 h.o vortex good or bad?

My model number looks like 434aprjun but that isn't listed so I am assuming that its 434aprjvn... Whats the specs on that motor I cant seem to find it on google?

 

[Scott Danforth]

Re: 4.3 h.o vortex good or bad?

please correct me if i am wrong, and i may very well be, but dont the vortec engines use 8 bolt intakes? afaik all automotive ones were unless some of the real early ones were 12. Unless marine applications are different. Just curious, i may need one in the future.

Vortec heads came out in 1996, the engine is in a 1994 boat. NOT a vortec engine in this case.