The Mitsubishi Pajero Owners Club®

ANXIETY · Posted: Tue Sep 02, 2014 11:27 Post subject:

Ok, so I ground the piston crown as best as I could with a dremell disc on the cordless drill. It didnt have enough revs do do a decent job but I managed to get rid of some of the high spots. The head I took it home and worked on it with the dremell and did a pretty decent job, still has a couple of marks but I didnt want to take off too much material.
Valves are fine and also changed the seal plug which was pretty deteriorated. I suppose that will solve my smoking engine issue.
So Its going back together now so I'll keep my fingers crossed. I guess I'll get some detonation or pinking, I'll hope I dont create any more damage.
Any thoughts or advice?

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nick-dudley · Posted: Tue Sep 02, 2014 19:10 Post subject:

What is this seal plug? To solve smoking its the valve stem seals you need to change Smile

as long as the piston has no high spots and the valve recess is still similar in shape to allow for smooth running of the valve there is no issue.

trekker · Posted: Wed Sep 03, 2014 6:28 Post subject:

Have you found the object which caused this damage ? To have left the engine it's either passed into the exhaust, or it's still inside one of the ports.

Have a good look around there, I'd hate to hear of a recurrence.

ANXIETY · Posted: Wed Sep 03, 2014 8:28 Post subject:

Yes whatever it was ,or part of it went out the exhaust port leaving a nasty gouge in the head on its way out. There was a loose bit in the plenum but that came out. I'm going to spray some WD40 in the plenum incase there is something stuck in the grime in there.

trekker · Posted: Mon Sep 08, 2014 11:22 Post subject:

So the piece which passed into the exhaust has entered the hot gas side of the turbo.

Given the very tight clearances there, I would expect damage to the impeller at least.

I would suggest you take off the turbo and inspect that end whilst the truck is down.

ANXIETY · Posted: Mon Sep 08, 2014 12:21 Post subject:

No turbo, thanks god.
That would make me cry lol.
Got most of it back together now, only rocker cover, ancilaries and belts, plenum and coil module etc... and we are good to roll I hope.
I recon if I dont finish today it will be ready to run tomorrow.

nick-dudley · Posted: Mon Sep 08, 2014 12:27 Post subject:

Fingers crossed you get a good result , I hope you can at least get back to using and enjoying it Wink

ANXIETY · Posted: Mon Sep 08, 2014 12:32 Post subject:

nick-dudley · Posted: Mon Sep 08, 2014 12:40 Post subject:

I understand now, you had external oil smoking problems, not exhaust related oil burning Embarassed

Yes had a few oil leaks related to those plugs on both mine and customers v6's. Some gasket sets don't contain them.
At least you're close to getting sorted Wink

My low mileage v6 is due to have head gaskets and valve seals, not needing them yet but wanting to do it for peace of mind Wink

ANXIETY · Posted: Mon Sep 08, 2014 12:45 Post subject:

Yes, little by little its getting sorted now. Still hasn't cost me a grand yet so my budjet project is doing well despite this hiccup. Razz

ANXIETY · Posted: Thu Sep 11, 2014 7:31 Post subject:

IT LIVES!!!!!!!!!

At last, it fired on the second push of the button (I've got a pust start button).
It runs ok but I've got that nagging image of the damaged pistion in the back of my mind.
The only problem is that after a while of starting the engine the amber oil light comes on.
The oil level is ok, I suppose the oil level sensor is a bit gunked up from having the oil sump empty for some time.

nick-dudley · Posted: Thu Sep 11, 2014 10:25 Post subject:

Great news Wink

You need to try and enjoy it now rather than just see it broken down Confused

And push the thoughts of a damaged piston to the back of your mind, else you'll always worry about it. I had the same problem with the oil level sensor and it is a common problem, it bugged me a lot so I took the bulb out and manually checked oil level every day until I had used it for a few weeks and trusted it.
Concentrate on using, and planning mods Wink

ANXIETY · Posted: Fri Sep 12, 2014 7:15 Post subject:

For sure its time to enjoy it more... Basicly I bought it to take the family out to the countryside so my planned mods will go towards a outing vehicle so mods will be DIY awning, fixings for tables, chairs bicicles, etc....and maybe a lift and snork to get across rivers to get to the good spots lol.
Fitted a cool Skunk2 gear knob yesterday, had enough of the old manky cigarette stained one. Laughing

BTW some how while fiddling underneath I've fixed by accident the 4X4 flashing lights in my dash Cool