Anyone with heads off the block?
TReK
Joined: Jul 2017
Posts: 3,387
Likes: 488
Not sure if you caught in my posts above, my block has been flange sleeved by previous owner from the stock bore 3.700 to 3.780. No idea what pistons/rings were used. Bores were measured and honed by shop. Nothing found as unusual. I used rings that matched the bore and groove thickness, think they were Ford 4 cyl Hastings rings.
No smoke ever - none at startup, run hard, let off accelerator. The cats are doing an great job but that won’t last. Didn’t do a leak down since my compression is good. Engine runs excellent and is strong....burns obscene amounts of oil
No smoke ever - none at startup, run hard, let off accelerator. The cats are doing an great job but that won’t last. Didn’t do a leak down since my compression is good. Engine runs excellent and is strong....burns obscene amounts of oil
Sorry, I do remember the .080 over now.
From what you have said, I would think oil control rings then. Wrong ones, or directional and upside down.
At least that's where I would start.
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Rock Crawling
Joined: Aug 2017
Posts: 263
Likes: 32
From: South Dakota
I wish that easy. 3 piece oil ring. Other than forgetting to install it, it can’t be installed wrong
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Rock Crawling
Joined: Aug 2017
Posts: 263
Likes: 32
From: South Dakota
No they, it’s me. Machine shop did the machining. I did the assembly and first start. I am my own warranty but the shop is helping me to troubleshoot and diagnose. I could have made a mistake but am doubtful. At this point I’ll be relieved if I find a mistake cause then I know what the cause is.
TReK
Joined: Jul 2017
Posts: 3,387
Likes: 488
I don't doubt anything that you have said.
I do have a hard time beliving that those old cats could clean up that much oil, to the point of no smoke.
I would also think the cylinder walls would show some wear, if it is the rings that are bad. Or that the pistons may make some noise, because I would expect the rings to be the wrong size, or in bad shape, to allow so much oil through. That is alot of oil to pass the rings.
It seems so much more likely for the oil to be leaking past the valves, but I know you have checked that too.
It seems at this point you are running out of options, other than disassembling the engine and measuring everything.
When you used the bore scope, did the cylinder walls look ok?
I do have a hard time beliving that those old cats could clean up that much oil, to the point of no smoke.
I would also think the cylinder walls would show some wear, if it is the rings that are bad. Or that the pistons may make some noise, because I would expect the rings to be the wrong size, or in bad shape, to allow so much oil through. That is alot of oil to pass the rings.
It seems so much more likely for the oil to be leaking past the valves, but I know you have checked that too.
It seems at this point you are running out of options, other than disassembling the engine and measuring everything.
When you used the bore scope, did the cylinder walls look ok?
TReK
Joined: Jul 2017
Posts: 3,387
Likes: 488
The one thing I don't understand is how so much oil is pooled in the heads...after the engine is off.
That tells me it IS coming from the heads.
Otherwise, I would think that any oil that was blowing past the rings would have been burnt off before the engine stopped. Or if that much oil was passing the rings, that the plugs would be fouled to the point of multi cylinder misfires. Or obvious cylinder noise and/or damage.
I would re-check the heads.
Remove them to check them if you need to, at least before pulling the entire engine.
That tells me it IS coming from the heads.
Otherwise, I would think that any oil that was blowing past the rings would have been burnt off before the engine stopped. Or if that much oil was passing the rings, that the plugs would be fouled to the point of multi cylinder misfires. Or obvious cylinder noise and/or damage.
I would re-check the heads.
Remove them to check them if you need to, at least before pulling the entire engine.
Mudding
Joined: May 2013
Posts: 118
Likes: 17
Just went thru this thread and it sounds like the excess oil in the heads are from a ill fitting head gasket. Most likely because of the out of spec head height. You can get copper head gaskets in varying heights that can correct this issue and get back to spec.
I think the oil is leaking into the cylinders (bad fitting head gaskets) and then getting blown upward into the heads and manifold while running. Once the engine is off all that oil is leaking downward.
My 2 Cents
I think the oil is leaking into the cylinders (bad fitting head gaskets) and then getting blown upward into the heads and manifold while running. Once the engine is off all that oil is leaking downward.
My 2 Cents
Last edited by MrHSE7; Mar 2, 2018 at 02:31 AM.