Rebuilding an Engine that doesnt need a rebuild.

[enkeivette]

There is a strong possibility I will be scoring a 4.0L Jeep I6. It has 190K miles but still smogs and runs like a champ.

But Id feel silly installing it without freshening it up at all, so, what are the high wear parts in a motor? Im thinking, new valve guides in the head (skipping the valve job), flex hone the cylinder and new rings, new crank and rod bearings, and a new timing chain.

Anything else? Im sure the lifters and bores will be fine, machine shops dont really even touch the lifter bores. But how about the cam bearings? I would think that they dont wear out nearly as fast since there isnt much rotating mass on a cam.

AND if anyone plans to lecture me about doing it once and doing it right, please also answer my question :) :p

[94cobra69ss396]

Lap the valves and install new valve springs.

[enkeivette]

Think the valve seats will be fine? Its an iron head. Can you get a tool to lap valves yourself?

[94cobra69ss396]

Yes, you can pick up one of the cheap suction cup style ones at any autoparts store as well as the compound.

[enkeivette]

Thanks man. Whats your experience with cam bearings? Have you ever really seen them wear out?

[Damian]

Look at the lifter and rocker components. The rocker bridges might be twisted like mine were.

[kdracer73]

I think the 4.0 motors are prone to valve issues. The valves stop rotating in the guide, causing abnormal wear. We pull the rockers and look for scoring on the valve tips. Not sure what years are effected, but there is a factory TSB.

[Leedom]

Can you get a tool to lap valves yourself?

You can use a hose that can fit on the valve stem as well and just pull on it and twist.

See it in action here (www.powerblocktv.com/episodes/HP2012-19). Just skip to about 13 minutes.

[enkeivette]

Thanks for that video! It's great. I didn't realize that lapping valves meant checking them. I thought it meant taking off material to make the edges true again. Good to know. ...So if they seat correctly, no need to machine or replace anything.

[BRUTAL64]

There is a strong possibility I will be scoring a 4.0L Jeep I6. It has 190K miles but still smogs and runs like a champ.

But Id feel silly installing it without freshening it up at all, so, what are the high wear parts in a motor? Im thinking, new valve guides in the head (skipping the valve job), flex hone the cylinder and new rings, new crank and rod bearings, and a new timing chain.

Anything else? Im sure the lifters and bores will be fine, machine shops dont really even touch the lifter bores. But how about the cam bearings? I would think that they dont wear out nearly as fast since there isnt much rotating mass on a cam.

AND if anyone plans to lecture me about doing it once and doing it right, please also answer my question :) :p

I have an 88 4.0 long block with intake and exhaust sitting in the shop...I want to get rid of it..std bore was running when I pulled it.

[enkeivette]

Post it on Jeep forum, it'll be gone by the end of the day.

[BRUTAL64]

Post it on Jeep forum, it'll be gone by the end of the day.

what jeep forum.....:p

I found it...waste of time...you have to be a certain level on the forum to post parts.:crutches:

[enkeivette]

I'll do it, whatcha want for it? Mileage ballpark? Send me your public contact info.

[BRUTAL64]

I'll do it, whatcha want for it? Mileage ballpark? Send me your public contact info.

$400.00 is what I want...will take ?
Mileage is about 75,000--- was running when pulled. Head is off for inspection and STD bore. Longblock with intake and exhaust.

[enkeivette]

Contact info?

[BRUTAL64]

I think the rings will be fine, if there's no scoring I'd run them. Youre already getting kicked in the balls having to get your crank welded up and machined back down, why kick yourself any harder?

New crank? new bearings? new cam? new rings... fuck. Take a page out of the book of Chiltons. NOTHING gets replaced unless it is out of spec. You're building a motor, not a china doll collection.

Yea...thinking like that is what engine builders love......:bang:

Always build the short block the BEST you can afford..then go up a step or two. :judge:

Oh yea, one more thing......I do not know of one TRUE engine builder that uses Chiltons for building an engine:smack:

[BRUTAL64]

Contact info?

You mean a phone number or Email?


It is an 88 jeep 4.0.

[enkeivette]

I may not have your experience, but you know I can build an engine. Case in point, the last two times I melted a piston, I ordered just the one piston, just the one ring set, just the one rod bearing, copper sprayed the MLS HGs to reuse them... and you saw it, my motor runs like a champ. Spent prob $130. If the rest of the parts are good, why junk them?

[BRUTAL64]

I may not have your experience, but you know I can build an engine. Case in point, the last two times I melted a piston, I ordered just the one piston, just the one ring set, just the one rod bearing, copper sprayed the MLS HGs to reuse them... and you saw it, my motor runs like a champ. Spent prob $130. If the rest of the parts are good, why junk them?

DID you cheap build the original short block????:pot_stir:

[enkeivette]

No sir, but I didnt build it twice either :)

[enkeivette]

Ya, whatever you want me to put in the Jeep forum thread.

[BRUTAL64]

Ya, whatever you want me to put in the Jeep forum thread.

glenn64vette@yahoo.com

[BRUTAL64]

No sir, but I didnt build it twice either :)

You did do it right the first time so you didn't have to build it twice. You used good parts so no reason to replace anything but the damaged parts.:p


You are a lawyer right? :pot_stir:Then you know never to ask a question you don't already have the answer to:judge:

[Vettezuki]

. . .You are a lawyer right? :pot_stir:Then you know never to ask a question you don't already have the answer to:judge:

In court and some other debate scenarios. Useless for actually learning!

[enkeivette]

Generally true, very good insight.

But, first I dont think our back and forth ended with me asking a question, but rather a poignant remark :)

Plus, the witness response doesnt always have to be congruent with the answer youre seeking. If the question suggests the answer strongly enough, the witness' response may be irrelevant.

[BRUTAL64]

In court and some other debate scenarios. Useless for actually learning!

Is there more for you to learn?:pot_stir:

[enkeivette]

And absolutely, Im no UTI tech, teach on professor Glenn :)

[BRUTAL64]

Generally true, very good insight.

But, first I dont think our back and forth ended with me asking a question, but rather a poignant remark :)

Plus, the witness response doesnt always have to be congruent with the answer youre seeking. If the question suggests the answer strongly enough, the witness' response may be irrelevant.

So in this case what I ask or state is relevant ....cause in learning one has to teach ...one has to learn? Correct or not correct??

[BRUTAL64]

And absolutely, Im no UTI tech, teach on professor Glenn :)

Until I was about 45..... I thought I was smarter than.......... and knew everything worth knowing...do not make that mistake....:judge:

[enkeivette]

Until I was about 45..... I thought I was smarter than.......... and knew everything worth knowing...do not make that mistake....:judge:

I wasnt being sarcastic at all, I was serious.

But there is nothing to learn here. Of course new parts would be better. And a 502 would also be better. And a 557 would be better than that. This is a subjective cost vs benefit argument. There is nothing to learn because there is no correct answer.

Ill clean up this thread when I get to a comp, we've hijacked it.

[enkeivette]

Today, is a day, that will live in infamy. Today... enkeivette was more frugal than Brutal. ...I believe!!!

[BRUTAL64]

I wasnt being sarcastic at all, I was serious.

But there is nothing to learn here. Of course new parts would be better. And a 502 would also be better. And a 557 would be better than that. This is a subjective cost vs benefit argument. There is nothing to learn because there is no correct answer.

Ill clean up this thread when I get to a comp, we've hijacked it.

That is all you got from this? Yea clean it up.....:rolling::judge:

[enkeivette]

http://www.jeepforum.com/forum/f126/88-jeep-4-0l-i6-long-block-running-w-75k-miles-1525526/

[enkeivette]

That is all you got from this? Yea clean it up.....:rolling::judge:

No, didn't get anything from this :p

Agreed that you have more experience with engines, more to teach, and I have less, and more to learn. :judge: But remember that just because you know more, doesn't mean that you are inherently right.


Me: :pot_stir: ...:eek::leaving::leaving::leaving:


Glenn: :mad::mad:


Me: :shock: ...:banburn::banburn::banburn:

[Damian]

$400.00 is what I want...will take ?
Mileage is about 75,000--- was running when pulled. Head is off for inspection and STD bore. Longblock with intake and exhaust.

If it was a 2.5l, Id take it right now.

[Shaolin Crane]

If it were me, i'd just put an LSx in it.

[enkeivette]

If it were rich you, if it were rich me Id do that too :)

[Shaolin Crane]

If it were rich you, if it were rich me Id do that too :)

It's really my answer for everything now.

"Man I have a huge headache" "Do an LSx swap, you'll feel better"
"Dude I think my wife is cheating" "Swap and LSx into your car, you'll forget all about it"

[enkeivette]

Lmao, its funny cuz its true.

[Damian]

Yes it is!

[BRUTAL64]

93 GMC Typhoon: new money pit/PITA. Now GT3788R powered.

Boost, because sometimes atmospheric pressure just isn't enough.

"If it has tit's or tires, you can be pretty sure your going to have problems with them..."

Yea..but if the Tits are big enough..you won't mind the problems so much:laugh:

[enkeivette]

Yea..but if the Tits are big enough..you won't mind the problems so much:laugh:

Invaluable words of wisdom :)

[Damian]

Depends on who the tits are attached to though.

[BRUTAL64]

Depends on who the tits are attached to though.

I'm talking a REAL woman here...you have something else in mind????:laugh:

[Damian]

A 300lb jungle woman can have big tits, doesn't mean I want burry my face in them!

[enkeivette]

Lol, 300 lbs no thanks, jungle woman, yes please.

865

[enkeivette]

Mmm raquel welch. :drool:

[Damian]

That jungle woman is fine.

[BRUTAL64]

A 300lb jungle woman can have big tits, doesn't mean I want burry my face in them!

Have you tried it???......try it you may just like it...:smack:

[Damian]

Some do say that bigger girls make better lovers. A buddy of mine is dating a big girl and she treats him almost like royalty. Kinda gealeous sometimes.

[enkeivette]

300lbs is too much. Voluptuous or curvy is nice, wider than tall is not.

[enkeivette]

Speaking of 300lbs, look at this girl, very cool story. But there is no way she is 300lbs in that pic. She looks smaller than my Dad did at 290, and there is now way she had the sort of muscle density that he did.

http://www.aworkoutroutine.com/meet-tina/

[Vettezuki]

She was 230 in that pic.

[enkeivette]

Oh ok, I read too much to be careful when I leisure read. Ha

I need to post the story I read after it in DA... involves a 300lb woman killing a man by sitting on him