How can I mend this?

[. Q]

Head off of a 3 cyl diesel. I cannot find a replacement, so any ideas?
Cast rod stick weld? Braize? JB weld?
Local firm don't want to try to repair it.

 

[tinman]

that looks like a spray weld job but would depend on how deep the crack goes too, as in how far you'd have to go down to chase it and access to it.
what's it off?.

 

[TripleSix]

What engine is it off?

Just get in there with the grinder and the mig, nowt to lose?

 

[Robt]

As above! Grind then weld then love it.... hours of tiny grinding to get it good

 

[Mc115reed]

Grind it back until your confident your gonna penetrate all the way through, ideally clamp the whole head solid on a flat work bench, weld it up with plenty of weld and leave it clamped up until it’s cool... then spend many man hours grinding it up tidy ... then take it too a machine shop too be skimmed as all that heat might have distorted the head slightly... then get the valves seated properly and bolt it back together.... pretty much any well equipped machine/fab shop will do it for you it’s just how much ££££ you want too spend

 

[Deutzdx3]

As above with the addition, pre heat the head being it’s cast iron. If it were mine I would be looking online to see what the most suitable wire mix would be. Even possibly mig brazing it if you have that facility. Post warm it as well to all the whole thing to cool evenly. Will reduce chance of cracking. Then as mentioned skim it just incase. [emoji106]

 

[A1an]

If you do weld it make sure you cool it as slow as possible or it will crack.

I once had the local blacksmith weld a cast iron manifold for me. He heated the manifold up to cherry red and whilst welding there was a lad still heating the rest of the manifold, he then buried it deep in a box of lime where it stayed for 24hrs.

 

[. Q]

It is off an old Hitachi Jap import 3 tonne mini digger.
I cannot find any engine numbers on the block / head / rocker cover and the machine serial No. is difficult to make sence of...5 not 6 digits.
Can you identify it?

 

[deleted user 837354]

If you do weld it make sure you cool it as slow as possible or it will crack.

I once had the local blacksmith weld a cast iron manifold for me. He heated the manifold up to cherry red and whilst welding there was a lad still heating the rest of the manifold, he then buried it deep in a box of lime where it stayed for 24hrs.

Seen a chap done similar. Has to be heated up nice although someone once said to me they had done an engine part using a gas barbecue on full bore with the lid closed.

 

[agrimax]

I'd say it's a Kubota D1403 engine. Engine serial number should be on the top of the inj pump housing,just above the pump inspection cover (in your first picture).

 

[Sharpy]

Kubota D1403 I think.

Edit. Beaten to it by @agrimax

 

[TripleSix]

£340 for a new head

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[Jameshenry]

I wouldn't even attempt it, there will be a replacement head out there somewhere, only way to go

 

[tinman]

There's a thing called the dunning cruger effect and its cumming into play here.

If you do repair that head {which sounds crazy given a new one could be bought for 300 odd quid} you make sure you give it to someone who is competent at the job, it's a one trick pony and not something you lash into with a mig welder.
There is a world of things to be aware of when dealing with cast iron and a lot of experience required.

Anyways, maybe try JEM engines up near Falkirk, last time I was there there wasn't much he didn't have for kubots engines on the shelf, ask for Erik.

 

[. Q]

Brilliant, thank you all for your help.

It is a Kubota D1402, looks like parts are available;
https://www.ebay.co.uk/itm/KUBOTA-D...771604?hash=item3f85070d94:g:eX4AAOSwYzFZmw4W

This forum is great for subjects like this, everyone's an expert at something ..I just never thought to look on the pump for engine No.

Are you sure I can`t try JB weld ??

 

[A1an]

I'd say it's a Kubota D1403 engine. Engine serial number should be on the top of the inj pump housing,just above the pump inspection cover (in your first picture).

You get a "1 year out" t shirt.

 

[. Q]

New head £330
Gasket set £80

Smile on my face when mucking about in mud .... Priceless !

Thanks.

 

[Dry Rot]

Here's one for $100. Probably direct from the manufacturer!

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Kubota D1402 Cylinder Head - Buy Kubota D1402 Cylinder Head,Kubota D1402 Cylinder Head Factory,Kubota D1402 Cylinder Head Product on Alibaba.com

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