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Tool Talk Discussion Forum

I finally got the 4.0L engine out.

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RobMD

08-20-2007 20:38:09

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Of course the 4.0 L straight six is a great engine. It's just the stupid torx bolts planted totally at random all over it. There's no need for stupid torx bolts. Nothing.

Anyway, Finally caught the snap-on man for a set of sockets and torx bits. Finally managed to rig up a good maneuver to get the bolts out. Took a total of 5 hours to get the two top bolts out.

Oh, and someone mentioned manuals. I have to laugh, as my haynes and chilton manual both say "loosen the bottom engine-to-bellhousing bolts and remove the top bolts". ----- ---Well, NO schitt, right? LOL.

And my "kill chrysler engineers" was just a result of my steam blowing off. Rather really offensive, i'm sure, but, sorry.

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Hobo,NC

08-21-2007 17:05:36

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Re: I finally got the 4.0L engine out. in reply to RobMD, 08-20-2007 20:38:09

You are gonna hate me for this but I have never had a problem with them bolts. the rite tools do make it go much EZ'er. I was thinking they were replaced with standard 3/8" bolts but may B wrong. I do know they do mix and match metric and standard threads on that block and have found a mix with the engine to trans bolts. to git back on your good side I will give ya a good tip with a pix, remove the front grill and headlight panel as a assy, only 4 more bolts and it opens the whole front, look B-hind the park'n lamps fot the bolts and it has a nice bulk head disconnect on the left side b-hind the park'n lamp.

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Bill-KCKs

08-21-2007 13:19:28

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Re: I finally got the 4.0L engine out. in reply to RobMD, 08-20-2007 20:38:09

The 4.0L straight six traces it's heritage to a Nash design from the 20's. I happen to have got a bad one in my 2001 Cherokee. Camshaft bearings went out at 47000 miles, causing no oil pressure at idle. Chrysler's extended warranty (which I'd been having buyers remorse over) covered all but $50 of the short-block. BUT, 4000-miles later, the camshaft position sensor died, taking the camshaft with it, and leaving me sitting along the roadside in the rain. At first, Chrysler said, sorry, warranty is up, that will be $700, but I got that straightened out.

Prior to Chrysler putting in the short-block, while I was having oil pressure problems, I sent an oil sample in to Blackstone Labs. The analysis showed heavy anti-freeze contamination, which is what ate my cam bearings. Evidently that block or head had a crack.

Unfortunately, it still uses coolant. The dealer has tried to find where its going, without success. I suspect the head had a crack and they didn't magnaflux it...

That vehicle will need a new owner soon.....

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Hobo,NC

08-21-2007 17:22:48

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Re: I finally got the 4.0L engine out. in reply to Bill-KCKs, 08-21-2007 13:19:28

I worked on a 4.0 (98 or 99) for years that would loose coolant and went threw a couple radiators. I tried Evey EZ trick in the book to find the leak but it never showed up. I don't remember how I came to replace the head but think'n instead of the usual coolant pressure test I removed the plugs then put the system under pressure overnight and saw coolant in a cylinder next day. Removed head and saw crack, new head fixed it and far as I know has not lost a drop of coolant. I do all the maintenance on it and like your dealer more than likely took it for granted that the standard quick checks did not show up a problem. Its EZ to say add a little coolant to it, but they are not spose to git low a few times in 3k miles. B-cause a replacement radiator did show to have a small leak I felt I found it but more than likely the cracked head got both radiators. What got my goat was it never showed any of the symptoms that I would have expected from a cracked head. I had pressurized the system over night but never took the plugs out and looked for coolant in a cylinder. Chrysler is rite proud of a new head, 4 to $500 best I remember.

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Stumpalump

08-21-2007 08:28:31

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Re: I finally got the 4.0L engine out. in reply to RobMD, 08-20-2007 20:38:09

What is stupider is they guy who puts them back in without changing to regular bolts. The other think that is cool with jeeps are the tork bolts that arn't threaded. The are heat set rivits but you will break a torks bit trying to spin them.

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IH2444

08-21-2007 07:21:36

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Re: I finally got the 4.0L engine out. in reply to RobMD, 08-20-2007 20:38:09

you ought to try changing the EGR valve on a 4.6 lincoln engine....
about 4 hours.

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RobMD

08-21-2007 09:23:10

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Re: I finally got the 4.0L engine out. in reply to IH2444, 08-21-2007 07:21:36

Uh oh, It just so happens that I have a Merc grand marquis with the 4.6- maybe I'll sell it before getting that EGR valve replaced.

However, All is good now. Just think, I didn't even open a can of beer. Just a bunch of cuts and knuckle busting pain.

In all honesty, I shouldn't complain anymore. It's life, right?

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IH2444

08-21-2007 18:21:19

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Re: I finally got the 4.0L engine out. in reply to RobMD, 08-21-2007 09:23:10

Umm you might also consider paying to have someone change the starter if it goes out there is this one 10mm bolt over behind...
I bent and welded up a wrench to do one.

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Jon Hagen

08-20-2007 21:00:09

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Re: I finally got the 4.0L engine out. in reply to RobMD, 08-20-2007 20:38:09

Feels good to vent a bit about a stupid design:-)
Some of the older trucks/cars with equally tight fit to the top bellhousing bolts had holes in the firewall with pop out plastic plugs. Peel back the carpet, pop out the plugs and the "impossible" bolts were looking right at you.
Some durn bean counter will overide anything the engineers try to do to improve service ease if they can build the car $1 cheaper by forbiding the change. Even if it means the dealership mechanic or do it yourself type have to waste hours to get around it. Not the bean counters problem you see.

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MeAnthony

08-22-2007 14:11:30

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Re: I finally got the 4.0L engine out. in reply to Jon Hagen, 08-20-2007 21:00:09

My dad was an engineer at Chrysler back in the late 60's, early 70's. I recall him telling me that the final step in the approval process for a design change was to take it out to the shop and ask the guys who did the work if it was sensible or not.

Things sure have changed.

Y'all have a good evening.

Anthony

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Vern-MI

08-21-2007 04:34:02

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Re: I finally got the 4.0L engine out. in reply to Jon Hagen, 08-20-2007 21:00:09

You hit the nail on the head Jon. Design and test the part / product and it goes to the bean counter or purchasing if you will. They decide where and how the part will be sourced. Some occasions the part doesn't even match the design. The purchasing department should have to pay for any and all warranty so that they get a feel for the real cost of making a bad part. As it is the design group has to pay for warranty.

They always like to use existing tooling and will even put drilled and taped holes where they were not designed to be just so they can use existing tooling.

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Joe In CA

08-22-2007 13:07:24

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Re: I finally got the 4.0L engine out. in reply to Vern-MI, 08-21-2007 04:34:02

To correct an earlier post, the 4.0 Liter engine traces its design back to the AMC 232 six cylinder which came out in 1964 in the Typhoon (midsize) Ramblers. That generation of engines came in 232, 199, 258 and later 4.0 Liter displacement.

Joe

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