rewmer
Well-Known Member
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- 2,082
- Location
- Clacton, Essex, UK
Did I read somewhere that the 4.6 has cross bolted mains ??
Can I use a 4l block to repair 4.6?
- Thread starter sandyt
- Start date
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sandyt
Well-Known Member
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- 1,615
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- Wraysbury Nr Heathrow
Latest ones do think the earlier ones didnt.
The interesting thing here is from all the reading I have done and from personal experience I have not come across any issues except with the cooling system.
The first engine had a slipped liner after a major overheat which came about because of a hole in the by pass line from top of rad to expansion tank. New engine good for a few years then boiled because of orings letting air in and my stupidity I rebuilt the engine in November put the new liner in etc etc failed HG again last week and again it was cooling system this time radiator and my stupidity again I never replaced it - should have so in my opinion its not the block that needs the focus its the cooling system.
If you look at the coolant level if the orings leyt by or the top of rad lets by the coolant level weeps away to below the heads in my opinion the cooling system is king
The interesting thing here is from all the reading I have done and from personal experience I have not come across any issues except with the cooling system.
The first engine had a slipped liner after a major overheat which came about because of a hole in the by pass line from top of rad to expansion tank. New engine good for a few years then boiled because of orings letting air in and my stupidity I rebuilt the engine in November put the new liner in etc etc failed HG again last week and again it was cooling system this time radiator and my stupidity again I never replaced it - should have so in my opinion its not the block that needs the focus its the cooling system.
If you look at the coolant level if the orings leyt by or the top of rad lets by the coolant level weeps away to below the heads in my opinion the cooling system is king
sandyt
Well-Known Member
- Posts
- 1,615
- Location
- Wraysbury Nr Heathrow
Same block but if using a second hand one is there an issue with the longer stroke ie the rings will be moving over a longer part of the liner ??
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- 1,755
- Location
- Buckinghamshire.
Good point. You'll just have to run-in the last 10mm of travel again!
stjohnsmythe
Active Member
- Posts
- 474
I agree. If you keep on top of the cooling system then they do seem to be ok. Of course as soon as it does overheat there seems to be no end of problems.
