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Home > Help Needed / General Tech Chat > Oil on top of Pistons. Head of. Amazed what i seen.

Rammie2000

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belgium

So. My Traveler is nearly finished. Was testing the engine today but it seems An oilburner.
Pistons are clean zero to almost no pressure on the vent and it's not blocked( i can blow straight through it) edit: did notice quit some pressure comming from the valve cover when i unscrewed the Cap. . And sparkplugs are dry but bit dark.

Yet when a clean the oil from the Pistons start it up stop it one minuten later Running about 2500 rpm there is a pudle of oil on each piston.
Looked at the valve guide Rubbers but they look all good so where is it comming from?

Engine has been standing for a while.

So i was thinking stuk oil rings?

Is there a way of testing this without stripping the entire engine first?

Edited by Rammie2000 on 17th Dec, 2018.

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


TurboDave16V
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So it literally has oil collecting in the crown of the piston? But isn’t burning it off? I’m confused.

On 17th Nov, 2014 Tom Fenton said:
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Rammie2000

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Yes. Was just as amazed. When clean it all out and start it up it begins tot smoke enormas. When i shut it down and look into the sparkplugholes i van see a fresh pudle of oil. ( In less than a minuten.)

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


stevieturbo

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And under same circumstances, if you pull the intake off, there is no sign of oil whatsoever in there or on the intake valves ?

Breather system details ?

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


Rammie2000

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Not yet taken the intake of. Ill go in with my camera tonight. Breather is standard foto a 1100. ( Just one on the tapet covers. Doesnt blow very much really. ( Very slight if you feel wel.
If i take of the Cap from the rocker housing i get allot of blow there.

Let of the oil yesterday and poured in some diesel at 8 pm yesterday evening. Set Every piston tot halfway and filled it to the top of the sparkplugholes. This mornig some was leaked out but not even a 3th of what is in.

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


Rammie2000

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So in made this.
What in know now from putting 4 bar of pressure on each cilinder is that. If i donit on cilinder one i can see it leaking some air out of cilinder 4 ever so slightly.
Pressure on 2 i hear some air leaking into the inlet.
Pressure on 3 slight lost but undeturment where and probably just the tool because i can hear some air but the gauge stays on 4.
Cilinder 4 loses pressure straight down into the gearbox ( as expected since pressure on 1 made 4 blow a slight walm of air.

So Back to rings suspect.


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you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


Rammie2000

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belgium

Intake check is for tomorrow. Waiting for a new connector for my endoscoop camera.

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


Rammie2000

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Checked intake. No tracés of oil there. Did a second pressure test now after it been soaked with diesel. And blown dry. It holds pressure slightly better on most cilinders now.
4 is much better. As is 3 and 2 ( they still leak pressure but much less and they always Will leak some pressure ofcourse. . 1 still leaks the most air. Doesnt look as much changed there.

Filled them up with diesel again to see what happens Further.

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


stevieturbo

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Really not following what filling them with diesel will achieve or prove ?

And I've never had an engine anywhere that was so bad, oil could get from crankcase into the cylinder...unless the piston was completely melted or holed. Even if there was no oil ring altogether, I still dont think it would be that bad.

Compression test ?

leakdown test ?

Are the pistons the right size for the bore ?

You definitely installed piston rings ? lol.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


robert

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uranus

in case it helps rammie , i once had oil on the pistons ,and neat clear oil dripping from the exhaust ,turned out the guides were super worn ,and the seals had been pushed off the guides, and it was running down the guides profusely .

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steve1275

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Agree with Robert, a lot of oil collects on top of the head, worn guides/lack of seals will let it into the chamber. i have even had oil running down a guide parent bore which was mis-shaped

'Where does the engine go?'


Rammie2000

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Leak test as above. Pistons are there original.
And we Often have stuck rings in the traction avant. Then we fill the cilinders with diesel and let it soak through. Gets the gum loose. Thought it might help with these 2.

Did not yet do a compression test ill give that a go when home this noon.

On 13th Dec, 2018 stevieturbo said:
Really not following what filling them with diesel will achieve or prove ?

And I've never had an engine anywhere that was so bad, oil could get from crankcase into the cylinder...unless the piston was completely melted or holed. Even if there was no oil ring altogether, I still dont think it would be that bad.

Compression test ?

leakdown test ?

Are the pistons the right size for the bore ?

You definitely installed piston rings ? lol.

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


Rammie2000

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belgium

Had this head Running on a other engine 4 years ago. When installed it on this engine i had new seals on all of these Guides. ( Intake and exhaust.) In all honesty i can not Remember how they Guides were or if Remembered tot check them. And engine stoot for a year before start up. So they seals although in place might be dry or crackerd.

Thnx.


On 13th Dec, 2018 robert said:
in case it helps rammie , i once had oil on the pistons ,and neat clear oil dripping from the exhaust ,turned out the guides were super worn ,and the seals had been pushed off the guides, and it was running down the guides profusely .

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


Rammie2000

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belgium

Ok. Thnx. Let's hope. Really want toen avoid pulling the engine out of a fresh sprayed car. . All the other work i have no problem with.


On 13th Dec, 2018 steve1275 said:
Agree with Robert, a lot of oil collects on top of the head, worn guides/lack of seals will let it into the chamber. i have even had oil running down a guide parent bore which was mis-shaped

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


Rammie2000

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belgium

They all hold around 10 to 10.5 kg/cm2 so not bad for a 1100 engine

Time to test the Guides i guess.

How do i test those?


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you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


stevieturbo

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Northern Ireland

Pull the head off and inspect ?

Or you might be able to get an indication of valve rock if you removed the springs and measured side-side movement at the tip of the valve.

But given the head is so easy to remove, maybe best just to do that.

Or if you could plug the intake port and do a pressure/vac test thatgb might show something. But it's not something I've ever done to suggest how much or little air leakage you might expect to see/detect at the guides.

With a stem seal in place, I'd think a vac test should seal very well. Pressure test, less so ( although you're also at the mercy of actual valve seal too for a test like that

Edited by stevieturbo on 15th Dec, 2018.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


Rammie2000

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belgium

Pulling the head somewhere next week.

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


Rammie2000

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belgium

Valves wil have been the isue i guess top of head is coverd in oil around the exhaust valves.


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you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


Rammie2000

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belgium

Oil on Pistons but inlet deels dry.


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you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


Rammie2000

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belgium

Oil caps so hard one brakes a ship of just from holding it between the fingers.


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you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018


Joe C

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Check the valves for play in the guides, if the look OK, then mpi Viton seals on all 8.

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



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Rammie2000

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belgium

I checked 2 by setting the about 7 mm open and then a micro meter again the top of the stem.move about 0.15 MM side to side.also seen that 3 of the valves have Worn stems. The rest i places in the Guides and could wigle most of them by hand. So new Guides. Some new valves and indeed those viton seals if i find Some.

Geerts ( happy i don't have to rip the engine out. )

you can do anything if you set your mind to it...
i rather blow it up winning than keep it together losing.

finish date set for project 1... march 2018

Home > Help Needed / General Tech Chat > Oil on top of Pistons. Head of. Amazed what i seen.
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