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Old 03-18-2014, 03:36 AM   #1
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Engine Test Stand for the 4.0?

I'm pretty sure I know the answer to this question but figured I'd ask anyway...

I am rebuilding a 4.0 from my wife's 2002 wrangler. I started the pre assembly the other day only to find out that the machine shop put the cam bearings in wrong and bored 4 cylinders .020 and the other two .030 (glad I double checked). After all the retarded mishaps were fixed I am now back at the pre assembly.

Here's my question:
Is it possible to start the motor and test everything BEFORE installing it? Of course I will check all clearances and make sure everything is within specs during the assembly process but I just feel the urge to do as much bench testing as possible before attempting to start this thing. If anyone has any input I'd greatly appreciate it.

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2002 Wrangler 4.0 Apex Edition--4'' RC Lift--35'' BFGs--A work in progress.
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Old 03-18-2014, 03:53 AM   #2
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Quote:
Originally Posted by jordison460 View Post
I'm pretty sure I know the answer to this question but figured I'd ask anyway...

I am rebuilding a 4.0 from my wife's 2002 wrangler. I started the pre assembly the other day only to find out that the machine shop put the cam bearings in wrong and bored 4 cylinders .020 and the other two .030 (glad I double checked). After all the retarded mishaps were fixed I am now back at the pre assembly.

Here's my question:
Is it possible to start the motor and test everything BEFORE installing it? Of course I will check all clearances and make sure everything is within specs during the assembly process but I just feel the urge to do as much bench testing as possible before attempting to start this thing. If anyone has any input I'd greatly appreciate it.
Yes! You can start the motor on a stand
Either find a shop with a stand that can do it or look up how to build one of your offer own or you can buy one not cheap but easy to build.
But you could dyno test it for the same price or less. Good idea to do it. Allows you to make sure it is correct and easier to fix if needed
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