Resurface cylinder head

[canthai55]

2 hours ago, Cake Monster said:

Any other Metal, and the press Tools would crack under useage ( Hot Stamping )

Metallurgy and heat treatment has come a long way since then

[Olmate]

38 minutes ago, Tarteso said:

Just found and order the 10 new Bolts ????

Another issue I found are the valves, they are very oxided so I will clean with dremel,  grease them and hope they fit with the pistons well.

Need lapping.Not that hard

[Cake Monster]

12 minutes ago, canthai55 said:

Metallurgy and heat treatment has come a long way since then

The large Company that I was apprenticed at made all kinds of attempts, and spent an awful lot of Money to try and bypass the " Weathering " process of the Tool Steels.

This was attempted due to the high cost of holding specialist Steels over long periods of time, and to some extent the wastage during Manufacture of the Tools IE optimum material sizes Etc.

And you know what ? non of it worked, and to this day its the preferred process.

Yes I agree that Metrology, and Heat Treatment have progressed, but sometimes the older ways are best, and the ' Weathering " process of the Steels could never be replicated by a Gas Oven.

[Tarteso]

19 minutes ago, Olmate said:

Need lapping.Not that hard

 

[canthai55]

Hand lap valves ? What is this - 1920 ?

OP - take your head into a machine shop. Have the face milled, valves ground if they need it, or new valves and new seats installed.

This will give you new guides and new oil seals.

Replace head on car with a 100% rebuilt cylinder head, not some back-yard, hand-lapped, I-think-it-is-OK job

[canthai55]

MULTI-LAYER STEEL (MLS)

 

The ultimate head gasket design today is multi-layer steel (MLS), which is used on Ford 4.6L V8s, other Ford engines, as well as Chrysler, Honda, Mazda and others makes. This design typically has three to seven layers of steel. The outer layers are usually stainless spring steel, embossed and coated with a thin layer of nitrile rubber or Viton to provide extra cold sealing. The inner layers provide added support and thickness.

 

MLS gaskets are extremely durable compared to other types of head gaskets because of their all-steel construction. They won't burn through, and they won't relax and take a compression set that can lead to leaks and sealing problems. MLS gaskets also reduce blow-by and improve compression by reducing bore distortion in the cylinders (less load is needed to seal this type of gasket.) But MLS gaskets require a special type of head bolt that stretches when it is tightened ("torque-to-yield" or TTY head bolts, which should not be reused). They also require extremely smooth surface finishes on both the cylinder head and engine block to seal properly.

 

The latter can be established by any reputable machine shop - crucial if using an aluminum head and cast iron block as the head "moves" a lot

 

[Cake Monster]

8 minutes ago, canthai55 said:

Hand lap valves ? What is this - 1920 ?

OP - take your head into a machine shop. Have the face milled, valves ground if they need it, or new valves and new seats installed.

This will give you new guides and new oil seals.

Replace head on car with a 100% rebuilt cylinder head, not some back-yard, hand-lapped, I-think-it-is-OK job

Good advice.

If you are this far into the strip down on the Head and finding the Valves are Carbonated badly, then get the reground and seats redone  ETc

For the extra cost it could save you having to redo all the work, and who knows, the Head might go past being able to skim next time.

[Olmate]

28 minutes ago, Cake Monster said:

Good advice.

If you are this far into the strip down on the Head and finding the Valves are Carbonated badly, then get the reground and seats redone  ETc

For the extra cost it could save you having to redo all the work, and who knows, the Head might go past being able to skim next time.

The OP seems keen to DIY.Why not, we all need a hobby

[PFMills]

We had the head overhauled on an old car we have, pretty sure they just used a rotary lapping plate. If it needs a milling machine, must have had a good boiling. 

[Yellowtail]

So we're going from a coolant leak to an engine overhaul on a relatively low mileage engine....

[Tarteso]

1 hour ago, Yellowtail said:

So we're going from a coolant leak to an engine overhaul on a relatively low mileage engine....

Aha! once the Pandora's box is opened with 200.000.kms...That’s ok

Edited May 6, 2021 by Tarteso

[canthai55]

2 hours ago, Yellowtail said:

So we're going from a coolant leak to an engine overhaul on a relatively low mileage engine....

Recondition the cylinder head - which is already removed ...

Far from an overhaul

[Yellowtail]

12 hours ago, canthai55 said:

Recondition the cylinder head - which is already removed ...

Far from an overhaul

 

Yet you (apparently) and or others also recommending pulling the pistons to check the ring-gap. 

 

All that is fine, but were it me, I would replace the gasket and get another 100,000km out of it. Doing a valve-job will ad no value to the vehicle and will likely not improve performance little or at all. 

 

You can always do the valve-job/rebuild if the gasket kit does not resolve the issue. 

 

 

[canthai55]

11 minutes ago, Yellowtail said:

 

Yet you (apparently)

Never recommended .

 

[DavisH]

19 minutes ago, Yellowtail said:

 

Yet you (apparently) and or others also recommending pulling the pistons to check the ring-gap. 

 

All that is fine, but were it me, I would replace the gasket and get another 100,000km out of it. Doing a valve-job will ad no value to the vehicle and will likely not improve performance little or at all. 

 

You can always do the valve-job/rebuild if the gasket kit does not resolve the issue. 

 

 

If the engine has been properly maintained there should be no issues with the rest of the head. I had the same engine in a civic and it was still fine at 250K km when I sold it. No smoke issues and no gearbox issues. Perhaps clean up the values and replace the seals, and that't it. But if the op wants to keep it another 200-300K, then it may be a good time for an overhaul. 

[Tarteso]

49 minutes ago, DavisH said:

If the engine has been properly maintained there should be no issues with the rest of the head. I had the same engine in a civic and it was still fine at 250K km when I sold it. No smoke issues and no gearbox issues. Perhaps clean up the values and replace the seals, and that't it. But if the op wants to keep it another 200-300K, then it may be a good time for an overhaul. 

This is my plan, clean the valves, replace the seal rings and install the gasket after resurface the cylinder head,  all with new bolts..I think this will be enough.

Edited May 7, 2021 by Tarteso

[Yellowtail]

2 hours ago, canthai55 said:

Never recommended .

 

 

Yet you did comment on how easy it would be once someone else recommended it, yes?

 

[Yellowtail]

1 hour ago, Tarteso said:

This is my plan, clean the valves, replace the seal rings and install the gasket after resurface the cylinder head,  all with new bolts..I think this will be enough.

 

Good luck

[canthai55]

1 hour ago, Yellowtail said:

Yet you did comment on how easy it would be once someone else recommended it, yes?

Yes I did - and NO I did not recommend he do it

 

[Yellowtail]

1 hour ago, canthai55 said:

Yes I did - and NO I did not recommend he do it

 

 

Okay