Crazy idea that might just work.
10-14-2011, 12:39 PM
#1
CF Veteran
Thread Starter
Join Date: Oct 2011
Location: Warrenton MO
Posts: 1,467
Likes: 0
Received 1 Like
on
1 Post
Year: 2000
Model: Cherokee
Engine: 4.7L I6
Crazy idea that might just work.
i need my jeep to run on the POS engine thats in it currently until i get my new 4.7 out of the engine shop...
BUT!!! this happened
Can I replace the bearings and rods and pitons and rings and run it again??
im gonna try.
input would be helpful
BUT!!! this happened
Can I replace the bearings and rods and pitons and rings and run it again??
im gonna try.
input would be helpful
10-14-2011, 12:51 PM
#2
Senior Member
Join Date: Jun 2009
Location: West Texas
Posts: 553
Likes: 0
Received 1 Like
on
1 Post
Year: 1991
Model: Cherokee
Engine: 4.0 L
Yep, you can.
might be sloppy (as crankshaft might need polishin' etc etc), the 4.0 is a damn sturdy platform.....
but yep.
use a honer in the bores if you do.
let us know how you come out if you do!
cheers!
cpnwrench
10-14-2011, 05:39 PM
#3
CF Veteran
Thread Starter
Join Date: Oct 2011
Location: Warrenton MO
Posts: 1,467
Likes: 0
Received 1 Like
on
1 Post
Year: 2000
Model: Cherokee
Engine: 4.7L I6
im leaving the block in. bores are clean.might have to steal my ported polished super HP making head off my 4.7 though...
valve on that cylinder is pretty beat up...
doing it this week so ill make a build page for it with pics.
valve on that cylinder is pretty beat up...
doing it this week so ill make a build page for it with pics.
10-14-2011, 05:54 PM
#5
Senior Member
Join Date: Jun 2009
Location: West Texas
Posts: 553
Likes: 0
Received 1 Like
on
1 Post
Year: 1991
Model: Cherokee
Engine: 4.0 L
yeah, might wanna replace both valves on # 5, along with keepers, guides, springs, etc.
should be ok. if your daily driver and you want peak action performance blah blah blah, then measure all the internal tolerances and see what your willing to sacrifice to accomplish (as in $$$$$$$).
go get em!
cpnwrench
10-14-2011, 05:58 PM
#6
CF Veteran
Thread Starter
Join Date: Oct 2011
Location: Warrenton MO
Posts: 1,467
Likes: 0
Received 1 Like
on
1 Post
Year: 2000
Model: Cherokee
Engine: 4.7L I6
I have my other engine getting stroked to 4.7 at machine shop but have to wait 2 or 3 months... have pleanty other vehicles but i love love love ol' dixie...
10-14-2011, 06:08 PM
#7
Senior Member
Join Date: Jun 2009
Location: West Texas
Posts: 553
Likes: 0
Received 1 Like
on
1 Post
Year: 1991
Model: Cherokee
Engine: 4.0 L
Dixie....you gotta do any mods to the mounting architecture to drop that 4.7 in? just curious? and what tranny/flywheel/clutch torque converter(if auto) are you gonna match up?
i apologize for my ignorance, but can you bore the 242 CID to that displacement? IF you can, HOLY CRAP!
you'll be a sleepin MO FO against them ricers (japsters) out there!!!!!!!!!!
"I think you shook somethin' loose there Tiger!"
cpnwrench
Trending Topics
10-14-2011, 06:34 PM
#8
CF Veteran
Thread Starter
Join Date: Oct 2011
Location: Warrenton MO
Posts: 1,467
Likes: 0
Received 1 Like
on
1 Post
Year: 2000
Model: Cherokee
Engine: 4.7L I6
Im not boring it at all. honing the cylinders. theyre perfect.
you get the extra cubic inches from the AMC 4.2L crank and then get more from the 4.2L short piston rods.
if you bore the cylinder to 4.000 then you can use chevy 350 pistons and make it a 5.0 but the cylinder walls are to thin for my liking. im not that ballsy.
the head has 40hrs of porting.
the whole set up looks and goes together and drops in like stock.
then im bumping the compression to 10:1 and running it on propane cause its safer cleaner and creates a 30-40% HP gain and around 30-40 MPG too!!
im lookin at 320 hp on the engine running gas then when i do the conversion about 370hp or so...
all drivetrain remains stock though.
btw right now propane is about $1.80 a gallon!!!
you get the extra cubic inches from the AMC 4.2L crank and then get more from the 4.2L short piston rods.
if you bore the cylinder to 4.000 then you can use chevy 350 pistons and make it a 5.0 but the cylinder walls are to thin for my liking. im not that ballsy.
the head has 40hrs of porting.
the whole set up looks and goes together and drops in like stock.
then im bumping the compression to 10:1 and running it on propane cause its safer cleaner and creates a 30-40% HP gain and around 30-40 MPG too!!
im lookin at 320 hp on the engine running gas then when i do the conversion about 370hp or so...
all drivetrain remains stock though.
btw right now propane is about $1.80 a gallon!!!
10-14-2011, 06:43 PM
#9
Senior Member
Join Date: Jun 2009
Location: West Texas
Posts: 553
Likes: 0
Received 1 Like
on
1 Post
Year: 1991
Model: Cherokee
Engine: 4.0 L
MISTER!!!!!!
send me your specs!!! HOLY CRAP!
Prop/LNG wah! serious, 370?
that'll shatter the axle setup! (if you are like me that is! HENH-HENH! He said "shatter" AHENH-HENH
).............that is so friggin cool!
so, what is the down side to the prop/LNG conversion? faster wear on piston/ring-valvetrain combustion portion?
never really thought of it until I was reading your posts.
good god! sleepin giant!!!!
ahahahahahahahhahahahhahahahahahaha i smell evil brewing!
hope you'll disclose parts , mods etc......THATS what I wanna be when I grow up!
cheers!
cpnwrench
10-14-2011, 06:54 PM
#10
CF Veteran
Thread Starter
Join Date: Oct 2011
Location: Warrenton MO
Posts: 1,467
Likes: 0
Received 1 Like
on
1 Post
Year: 2000
Model: Cherokee
Engine: 4.7L I6
LMAO
its better to run propane actually. more life out of engine.
only downside is theres more gas stations than propane fills. theres a conversion co that has a us map of fill spots though. im gonna have a spare tank for just in case times.
I dont know why more people dont do this.
www.gotpropane.com
the 4.0 is the only late model that they can convert. gotta bypass the computer by installing and old style distributer.
pretty cool stuff.
its better to run propane actually. more life out of engine.
only downside is theres more gas stations than propane fills. theres a conversion co that has a us map of fill spots though. im gonna have a spare tank for just in case times.
I dont know why more people dont do this.
www.gotpropane.com
the 4.0 is the only late model that they can convert. gotta bypass the computer by installing and old style distributer.
pretty cool stuff.
10-14-2011, 06:56 PM
#11
CF Veteran
Thread Starter
Join Date: Oct 2011
Location: Warrenton MO
Posts: 1,467
Likes: 0
Received 1 Like
on
1 Post
Year: 2000
Model: Cherokee
Engine: 4.7L I6
im using forklift tanks so i can bring 3-4 10 galloin tanks with me for long trips.
and also through my tractor stack it will sound ungodly powerfull.
my stock 4.0 sounds like a 350ci chevy with open headers!
and also through my tractor stack it will sound ungodly powerfull.
my stock 4.0 sounds like a 350ci chevy with open headers!
