is a photo narrative of my 4.3L engine conversion.
I used the entire driveline from a
1989 Chevy S-10 Blazer - 4.3L V-6, 700R4 automatic transmission, and
NP231C transfer case. The motor mount used was the Advanced Adapters
bolt in saddle mount for a 5.7L in a YJ chassis.
Well, as of Friday May 27 2005 the
YJ is up and running on the 4.3L engine. All seems to be working well at
this point. I had to modify the 'Y' pipe from the V-6 to clear the front
driveshaft - I had a custom pipe bent. I have posted my wiring diagrams from splicing the 1989 Chevy
S-10 engine harness to my 1992 Jeep YJ chassis harness. I removed the
entire engine portion of the Jeep harness (i.e. injectors and sensors).
I did not use the mechanical fan on 4.3L and opted for a 2000 cfm
electric fan sitting in front of the S-10's radiator. (yes, I used the
S-10 radiator - it was way cheaper than a custom conversion radiator)
The wiring diagrams are posted
for information only I cannot warranty their accuracy, every
installation will vary. USE AT YOUR OWN RISK! (standard
legal disclaimer - don't be stupid and blame it on me!)
few key points ...
Chevy fuel pump MUST be used - the Jeep TPI system pumps at 19-39 psi
and the Chevy TBI system operates at 9-13 psi. The engine will not start
with the fuel pressure too high.