Evening all.

 

Newbie here. I have a 2013 focus 1.0 ecoboost 125 and the oil pressure light comes on and goes off sporadically when at idle. 

 

All checks are pointing to the oil pump. With bearing and whatnot damage a concern, I'm wondering what the physical differences between the 100 and the 125 engines are...besides the turbo which I'd read somewhere. 

 

I have searched but couldn't find anything definitive (and the search option started to play up).

 

EDIT: I should mention that I'm looking for one to strip and rebuild.

 

Thanks in advance 

18 minutes ago, Christoff913 said:

I should mention that I'm looking for one to strip and rebuild.

Don't even think about trying to fix/save/refurbish a ecoboost 1.0 The problems will be endless, and the cost will just spiral and in 99% of all cases it ends in tears !

6 minutes ago, unofix said:

Don't even think about trying to fix/save/refurbish a ecoboost 1.0 The problems will be endless, and the cost will just spiral and in 99% of all cases it ends in tears !

I'm aware of some of the issues. Wet belts, coolant degas pipe, oil pump clogging (the issue I believe I have), Vac pump to name but a few from my brief research. Anything else I should be aware of?

 

I know the Crank puller bolt needs the torque multiplier to get off/tighten.

Well apart from the £800 for the torque multiplier tool, there is the problem with the turbo oil filter.

As far as I know there has only been one guy that managed to rebuild a Ecoboost 1.0 and I'm not sure he would be so quick to do it again.

Have a read of the thread on the rebuild that Ray did.

 

Interesting read, thank you for that. 

I'm not adverse to doing jobs like that, nor buying/borrowing the tools to do so. So more than willing to give it a shot.

Back to the main question though...is there any physical difference between the 100 and 125 ecoboost engines?

Thanks 

16 minutes ago, Christoff913 said:

Back to the main question though...is there any physical difference between the 100 and 125 ecoboost engines?

I would think @iantt could probably answer your question best.

9 hours ago, Christoff913 said:

Interesting read, thank you for that. 

I'm not adverse to doing jobs like that, nor buying/borrowing the tools to do so. So more than willing to give it a shot.

Back to the main question though...is there any physical difference between the 100 and 125 ecoboost engines?

Thanks 

Different cylinder head (different valves, different valve seats and smaller ports).
Different turbocharger.

 

Rebuilding a 1.0 ECOboost is not rocket science but the parts and machining involved to do it properly are quite high.
 

The engines are identical, the turbos aren't

The engines are not identical. At least not on a 2013 Focus Mk3.

Also be aware That a Focus / C-max engine is different from for example a Fiesta engine.

24 minutes ago, JW1982 said:

The engines are not identical. At least not on a 2013 Focus Mk3.

Also be aware That a Focus / C-max engine is different from for example a Fiesta engine.

What are the differences between Focus & Fiesta out of interest?  Wouldn't have thought it economically viable to produce different engines with the same power output?

13 minutes ago, TomsFocus said:

What are the differences between Focus & Fiesta out of interest? 

Yes, this question has been bouncing round for years without coming to a definitive conclusion. Until Wilco's post above, I'd only seen comments on different software, thicker head gasket on the 140, possible turbo differences, nothing on valve sizes etc - and Wilco certainly knows his stuff!

This link (which I've posted elsewhere) suggests one basic unit suits a wide range of models.

https://pumaspeed.co.uk/product-Brand-New-Ford-Service-10-EcoBoost-Engine_18898.jsp

A few Years ago I compared part numbers (of all engine parts) and documented the differences.

I will take a look whether I still have this comparison or not.

The work I carried out required a timing belt, oil pump belt, crankshaft, piston, conrod, main bearings, big-end bearings, front and rear crankshaft seals, crank bolt, friction washer, turbocharger, turbo oil filter, head gasket set, head bolts, vacuum pump and a couple of cooling system parts. 

I don't know if other parts are different part numbers but all the (genuine Ford) parts were the same part number, pattern parts fitted either variant and even the brand new turbo (Nissens) listed the same part number for either.

Good luck on your project, you may be fortunate catching the issue early and not require multiple parts.

Lucky or not I would offer the following advice:

If re-using the oil pump, be absolutely meticulous clearing the pump oil strainer gauze. Apart from the obvious debris, some fibres are very difficult to see and dislodge in the mesh.

Check for any blockage in the oil system PCV. It has a fine gauze filter.

Ditto the vacuum pump, similar tiny gauze filter. May prevent future pump bearing failure.

Ditto the turbo filter in the engine block (readily accessible behind a screwed plug when the belts are removed). Cheap to replace if necessary. May prevent future turbo bearing failure.

Why all this debris can get past the oil filter is a mystery to me but I can testify it can and does, to great cost!

On 8/19/2022 at 12:08 PM, JW1982 said:

The engines are not identical. At least not on a 2013 Focus Mk3.

Also be aware That a Focus / C-max engine is different from for example a Fiesta engine.

The "base" engine is identical, surely. (By that I mean Block, Crank, Pistons, Head, Cams)

Sump, flywheel and Ancillaries different, yes

These are the differences between the 100 HP and 125 HP 1.0 ECOboost Focus MK3 engine as documented in the parts catalog:

Service engine (new engine):
100 HP = part number 1835978
125 HP = part number 1835980

Short block (bottom end):
100 HP and 125 HP = part number 1829184 (identical)

Cylinder head:
100 HP = part number 1856411
125 HP = part number 1857524

Inlet valves:
100 HP and 125 HP = part number 1760579 (identical)

Exhaust valves:
100 HP = part number 1760588
125 HP = part number 1760589

Turbocharger:
100 HP = part number 1808411
125 HP = part number 1808366

 

So definitely not identical on a Focus MK3. Things changed during production of the MK3.5 and even became more complicated and the 100 HP version even had a different bottom end for a short period. On the other hand the very late MK3.5 versions were fully identical except from the turbocharger..

Thank you all for your response. 

Very interesting to see (I come from owning a multitude of Hondas where a lot of things are interchangeable).

JW...thank you for this information. That is exactly what I was after.

Ray...that's a lot of work! You don't happen to have the part numbers for the micro filters do you? And also the solenoid? (As I saw you'd replaced yours).

 

I've replaced the oil pump (reused the belt though as that'll get changed when I do the timing belt). Unfortunately it's still doing it. The oil pump that came off looked in reasonable condition. Not really blocked up or anything - nowhere near as bad as some photos I've seen. It seems that it's only when it's up at running temperature, and only ever in idle. It comes on for around half a second at a time. Sometimes it doesn't. I'm thinking maybe it might be the oil pressure control solenoid. Any thoughts?

Block, crank and pistons identical but modified head for the 125, if I had a 100, I wouldn't loose any sleep having a 125 head on, I reckon it'd be OK

On 8/22/2022 at 9:38 PM, JW1982 said:

These are the differences between the 100 HP and 125 HP 1.0 ECOboost Focus MK3 engine as documented in the parts catalog:

Service engine (new engine):
100 HP = part number 1835978
125 HP = part number 1835980

Short block (bottom end):
100 HP and 125 HP = part number 1829184 (identical)

Cylinder head:
100 HP = part number 1856411
125 HP = part number 1857524

Inlet valves:
100 HP and 125 HP = part number 1760579 (identical)

Exhaust valves:
100 HP = part number 1760588
125 HP = part number 1760589

Turbocharger:
100 HP = part number 1808411
125 HP = part number 1808366

 

So definitely not identical on a Focus MK3. Things changed during production of the MK3.5 and even became more complicated and the 100 HP version even had a different bottom end for a short period. On the other hand the very late MK3.5 versions were fully identical except from the turbocharger..

Wow, I almost bought a wrong turbo (was trying to spare a penny using used parts). Thanks man!
Wanna replace turbo in mine. That ticking drives me crazy (+ underboost warnings and power drop on the highway). Any recommendations or mb something Im missing? 🤔

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