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4.0l lifespan

Tech Talk for Jeep owners.

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Posts: 1908
Joined: Thu Aug 04, 2005 8:09 pm
Location: central queensland

4.0l lifespan

Post by known 2 »

whats the lifespan of the 4.0l six
kaylee 2004 hdj78 RV. 33 mickey atz's, winchbar, 3i lift, 3i exhoust, spoties, roofracks and ufh. pimped interior .

86 lwb zook wt soa, 33's, locked, bard up, prety lights. monster tacho:/
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Posts: 1275
Joined: Mon Jan 13, 2003 10:32 pm
Location: Sydney

Re: 4.0l lifespan

Post by Gonzo »

known 2 wrote:whats the lifespan of the 4.0l six
Longer than all the other components in the car!




They are an old school, bombproof motor (mostly).
500 000 is not unheard of.
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Joined: Tue Oct 22, 2002 8:37 am
Location: Performing booty fab in my Garage

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Post by Wooders »

Just killed our XJ 4.0L with only 135,000 on the clock.....but it had been fairly abused and I'd basically cooked the engine twice and now the piston skirts have gone in #4 cylinder....
But a replacement engine wasn't that expensive (will be fitting it this weekend) and then I plan to rebuild the old engine bored & stroked ;)

Don't let my expeience put you off - overall thy are a solid an reliable donk.
Cheers [url=http://www.wooders.com.au]Wooders[/url]
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Posts: 1908
Joined: Thu Aug 04, 2005 8:09 pm
Location: central queensland

Post by known 2 »

what can be done to them to improve power. has anyone turbo'd them in or is a 4.7 v8 a better option if u want power.
kaylee 2004 hdj78 RV. 33 mickey atz's, winchbar, 3i lift, 3i exhoust, spoties, roofracks and ufh. pimped interior .

86 lwb zook wt soa, 33's, locked, bard up, prety lights. monster tacho:/
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Posts: 322
Joined: Fri May 21, 2004 12:10 am

Post by Steve F »

Best option is to stroke them, take it out to 4.6lt and it'll still look stock, no problems with rego etc. Plenty of power as well. Golen in the US quote 260hp for thier stroker, 190hp is stock.

Cheers
Steve
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Joined: Fri Feb 04, 2005 8:12 am
Location: Mel-bourbon

Post by franco »

i agree with steve, stroker kits are avail in the US...you ca even supercharge them too :armsup:
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Joined: Sun Apr 22, 2007 8:00 pm
Location: vic

Post by tjm_tj »

mmmm... i'm saving for a stroker kit
back in a zook....
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Posts: 1908
Joined: Thu Aug 04, 2005 8:09 pm
Location: central queensland

Post by known 2 »

sweet.

how does the drivline handle abuse running 35's. are breaking uni's a problem in the steering?
kaylee 2004 hdj78 RV. 33 mickey atz's, winchbar, 3i lift, 3i exhoust, spoties, roofracks and ufh. pimped interior .

86 lwb zook wt soa, 33's, locked, bard up, prety lights. monster tacho:/
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stu
Posts: 913
Joined: Wed Jan 22, 2003 8:08 am
Location: brisbane

Post by stu »

yes and yes, your steering rod ends will flog out a little quicker, your power steering pump will flog out a little quicker and your uni's will flog out a little quicker. i also have had the problem of the extra weight doing a little damage to the CA brackets.
i don't need no stinking quote for my sig. line!
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