1 - -
5.7 V8 Engine
1 - -
Custom Oil Pan
1 - -
1 - -
2" Body Lift
1 - -
After Market Electric Fans
- - Fan Wiring (for dual
- - ECM Programing,
- - Wireing Harnes,
- - Transmission,
- - Vortec Intake Manifolds and Fuel Injection
- - First Radiator
- - EGR Tube
- - Exhaust Y-Pipe
- - Water Pump and Flow Kooler disc
- - Air Conditioning
- - Corvette Radiator mounted
in forward position
- - Ford Taurus eFan Installation
- - AC Condensor installed
in forward position
- - GM AD244 HO Alternater
- - Modifications List
and Planned Mods List
- Photo Gallery
- - - -
I decided to create
this place on the web to share my Blazer ZR2 project to others who may
be interested in also doing the all mighty V8 swap. On these pages you
will find info and images describing what and how I accomplished my
V8 engine swap. First, here is the history of my ZR2. I traded in my
'95 Sonoma for my '98 Blazer ZR2 in September 2001. I got it with 49k
miles on it. Shortly thereafter I bought a 20' boat and wished I had
a V8. But the 4.3 did alright pulling it. Fast forward to November 2006
and I got the dreaded Chevy intake manifold leak. By this time my Blazer
has 112,000 miles on it. The faulty intake gasket leaked coolant into
my oil damaging the bearings and possibly bending a rod. So I drove
the Clackity Clack 4.3 for a month before it locked up. I knew it lock
up eventually but when it happened a couple days before Christmas was
a real bummer. However, this was my excuse I needed to do a V8 swap.
I did my research over the month of JAN, got the JTR V8 swap manual,
started buying the needed parts and joined all the usual S10 V8 swap
forums to soak up all the info I could.
Photo taken after V8 installed (before fender trimming
I didn't want to do a backyard project, so I found a shop willing to
work with my project. I did all the research, bought all the parts and
they supplied the labor and experience, although this was their first
S10/Blazer V8 swap. My Blazer went into the shop in the middle of FEB
and was finished by the end of APRIL. Most of this time period was down
time waiting for parts and reordering parts that did not work. The V8
wire harness was the big pain to find because most junkyards just cut
the wire harness up when they pull the engines out of the trucks. I
made the decision to get a 5.7 Vortec factory Chevy crate engine to
keep costs and difficulty in check. Engine: 1996-2000 L31-R Vortec 5.7.
These photos above
were taken after the swap was completed and the 2" body lift was
Below are a couple
photos showing the 5.7 V8 installed. It looks like stock accept you
will notice where the radiator shroud was cut to allow the AC Compressor
MANUAL - JTR
to Swap Manual at s10v8.com
The manual was not all that helpful and not specific at all for the
later generation body style. Although it was good for ideas and comparison.
It definitely helped to get a general understanding of what to do. The
ZR2 having slightly different configuration of frame and mounts did
lead to some extra steps not planned, such as having to use Advanced
Adapters mounting plates over the 2.8 mounts JTR recommends.
V8 4WD Canton Oil Pan - 7 quart
to Oil Pan at s10v8.com
Oil pan came with a regular pick-up tube but the Vortec 5.7 crate engine
purchased has a high volume oil pump and required a larger diameter
pickup tube. A call to Canton Performance tech support and they told
my what part number to get, M211S if I remember right. It took me a
few auto stores before I found it.
4.3 engine mounts with Advanced Adaptors swap plates part number 713123
Link to advanceadapters.com
These adapter plates are needed for the ZR2 application instead of the
2.8 mounts as described in the JTR manual. On a ZR2 the frame mounts
are factory welded to the frame. At least mine were as well as others
I have talked to. If you want to use the 2.8 mounts you will have to
have the 4.3 frame mounts cut off with a plasma torch and grinder. Loads
of fun if you have hours of free time.
Below you can see
the engine mount adapters installed. It is basically a heavy steel plate
that bolts onto the engine block and relocates the engine mount several
inches back to match up with the factory frame mount.
Patriot 4WD Conversion
to Headers at s10v8.com
It didn't take long for the
black paint to start wearing off the headers. Especially on the driver's
side. Below is the driver's side header after 500 miles.
Below is the passenger's
side header after 500 miles.
Note above you can
see a bolt-up for a mechanical fuel pump to the right. There is no opening,
just left over from the castings of the original Chevy 350's. You must
use an electric fuel pump with a Vortec 5.7.
2 inch body lift
To Body Lift Kit at SummitRacing.com
The 2 inch body lift kit was a necessity for the ZR2 application in
order to be able to have enough clearance to close the hood. This is
because the Advanced Adapters swap plates raise the engine higher up
in the engine compartment and the air conditioning compressor was too
high. It would not have been a problem if I had not wanted to keep my
AC Compressor on the Blazer. Without the compressor the hood would have
closed. The kit comes with everything needed but we did get a longer
gas tank filler tube. Also comes with brackets to adjust your bumpers
to the correct height to match the body lifted. The only thing noticeable
was the kit did not come with a steering shaft extension. There is enough
play to not need an extension but the steering seems to bind up a little
when steering to the left and the right and then it loosens back up.
A search on the internet forums revealed others noticed this too but
said that after driving a while this binding will wear and get less
noticeable. There seems to be no safety complaints about this though.
And after putting 500 miles on it I do seem to notice it has loosened
up just a little.
ProComp 12 inch electric fans(2) from White Performance - set up as
Link to whiteperformance1
Link to whiteperformance.com
Below the fans are
installed as pushers mounted with the supplied plastic mounting kit
to the air conditioning condenser. Its not a great angle to see then
as the the camera shot is through the front grill. But they are not
noticeable from the outside at all.
I have now changed my efan set-up to a single Ford Taurus efan
because the aftermarket fans were having trouble keeping the radiator
cool enough while the AC was running in stop and go traffic.
MIKE's 5.7 V8 BlaZeR2 - Page 1
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