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Posted by stryped on April 13, 2009, 11:20 am
Please log in for more thread options > 09d6eb531...@e18g2000yqo.googlegroups.com:
>
> > Well, been working on this v6 2000 3.9 l Dakota that my brother said
> > overheated and started blowing white smoke. I have the heads off and
> > wanted to make some comments and get some advice:
>
> > 1: This is the first time I have worked on a dodge. I thought the
> > distributor would need to come out in order to take the intake off. I
> > took off the mounting clamp for the distributor. I made a mark with a
> > sharpie on the "plate" that is on top of the distributor base below
> > the rotor. I made the mark in the direction the rotor was pointing.
> > (The best I could, it was hard to see back there.) =A0I actually never
> > took the distributor out. When putting this back together, can I just
> > aline the rotor with this mark. If it is off a 1/4 inch will it matter
> > or do I need to do something different?
>
> It must be timed back after you reinstall everything. 1/4" will be way
> out of time.
>
>
>
> > 2: I took all head bolts out and pushrods and punched holes in two
> > shoeboxes to store them to keep them in order. How do I tell if the
> > head bolts need replaced? Also, the push rods had a clack coating on
> > them. DO they need to be cleaned? Also, an old manual to another car
> > said to put grease on the top of the pushrod the area the rocker arm
> > contacts. Is this good advice or will it block oil flow?
>
> Everything should be cleaned. =A0The head bolts are most likely "torque t=
o
> yield" and will have to be replaced. =A0"Torque to yield" bolts are good
> for exactly 1 use.
>
>
>
> > 3. The back piston where I had high compression and was blowing
> > coolant out the spark plug hole was about two inches from the top. I
> > felt around and used a mirror and did not see anything wrong. Should I
> > turn the engine over so I can inspect the rest of the bore? Will this
> > disturb timing?
>
> Your timing is already disturbed from the distributor being moved. As
> long as you have not taken the timing chain off, turning the motor over
> at this point is not going to make any further difference at this point.
>
>
>
> > 4: On this same piston there are two areas where a small "glob" of
> > metal apparently attached to the piston. In this same cylinder during
> > disassembly, the spark plug gap arm was missing. They are about the
> > size of a baby asprin. I could not pry them loose with my finger.
> > Should I try a razor blade? Is this really bad?
>
> I would definitely get that off. =A0This will be bad for a couple of
> reasons, first and formost is potential interference with the head or the
> new spark plug. =A0Secondly, this will create a "hot spot" on top of the
> piston and lead to premature ignition, which could destroy the piston and
> engine. I would get that material off. =A0Turn the motor over to where th=
at
> piston is at the top of the bore. Melt a small amount of plain candle wax
> around the piston to cylinder gap, you just want to prevent any chips
> from getting down around the rings. Get the metal blob off the piston and
> make the area as smooth as you can. You don't want any sharp edges.
> After you are done, use a vacuume to clean up the area, then use an O-
> ring pick and carefully get all the wax out of the gap you can. The small
> amount left will melt off and be of no issue once the engine is fired
> back up.
>
>
>
> > 5: I am not sure if I am looking for is right but the head gasket
> > looked alright to me. There were no "blown out" areas where gasket
> > material was missing between cylinders or anything. Does this mean it
> > might not be the head gasket?
>
> Look for areas where the gasket laminate has separated. Many times there
> won't be a large gap, but the layers will have separated. =A0But, it soun=
ds
> more like a cracked head to me.
>
>
>
> > 6: Lastly, I am going to have a shop mill and crack check the heads.
> > If they hot tank them, will this mess up the valve seals? Should I
> > have them replaced? This engine has about 151,000 and ran ok when
> > disassembled other than the overhweatign and smoke assumed from a
> > leaking head gasket and anti freeze in the intake. I may drive this
> > truck if it runs or sell it, not sure.
>
> You have to have a "head set" of gaskets anyway. =A0This set comes with n=
ew
> valve seals. =A0With that many miles, provided they are not cracked, I
> would just have a full head job done. This normally costs about $75 per
> head. They will hot tank em, check for cracks, replace the valve guides,
> new seals, new freeze plugs (if applicable), regrind the seats and
> valves, check the valves for warpage, check the springs, etc, and re-
> assemble the springs, etc. =A0
>
>
>
> > 7: Oh, one last thing, some "leaf" material fell into the engine when
> > I took the intake off. I vacuumed it as much as I could but did not
> > get it perfect. Will this be a problem?
>
> Cleanliness is your best friend when doing engine work. Did this material
> fall into a water jacket or into the oil galleys? How much did not not
> get?
>
>
>
> > As always I appreciate your help!
>
> Yw.
>
> --
> Anthony
>
> You can't 'idiot proof' anything....every time you try, they just make
> better idiots.
>
> Remove sp to reply via email
I am trying to keep costs down but want to do this right too. Should i
replace the head bolts and have a valve job done?
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> overheated and started blowing white smoke. I have the heads off and
> wanted to make some comments and get some advice:
>
> 1: This is the first time I have worked on a dodge. I thought the
> distributor would need to come out in order to take the intake off. I
> took off the mounting clamp for the distributor. I made a mark with a
> sharpie on the "plate" that is on top of the distributor base below
> the rotor. I made the mark in the direction the rotor was pointing.
> (The best I could, it was hard to see back there.) I actually never
> took the distributor out. When putting this back together, can I just
> aline the rotor with this mark. If it is off a 1/4 inch will it matter
> or do I need to do something different?