Slipped liners? advice please

sandyt · Jan 30, 2013

Took head of right bank of 4.6 v8 its a late one done 30k miles rebuilt a month ago replaced a liner as it had a crack radiator failed last week hg blown head off now on pots 2 and 4 if I run my nail across the join between the block and the liner it catches not much but just a little - has the liner moved?
Any ideas welcome chaps
ta

griffman · Jan 31, 2013

That's a block out and top hat replacement I'm afraid.

When it happened to my disco we faffed about trying all sorts of nonsense - cost loads of time and money - still ended up getting top hat liners done.

Call Paul the V8 man(American Engine Parts from Pauls Place UK) - he does it for reasonable money - if you want it done quickly you will have to do an exchange at turner engineering - they always have one on the shelf.

sandyt · Jan 31, 2013

Yep I am guilty of that replaced one liner a month ago own stupid fault

fett · Jan 31, 2013

how did you replace it? just asking because it sounds like you did it with the engine in the car still from the way you have written it.

sandyt · Jan 31, 2013

Sorry no I sent it to a local engineering workshop who have done heads and things for me in the past

fett · Jan 31, 2013

ahh, I did wonder lol

sandyt · Jan 31, 2013

Could make a few quid if I can work out how to do it in car

Mr Noisy · Jan 31, 2013

sandyt said:
Could make a few quid if I can work out how to do it in car

hammer and chisel?

griffman · Jan 31, 2013

Noiseman - don't laugh - Having lived in Africa for a couple of years I have seen many engineering tasks attempted with said hammer and chisel!!!!!!!!!!!!!!!!!!!!!

fett · Feb 1, 2013

I know a guy who took out vm liners that way but luckily they have a top hat on them already so putting the new ones in was not so difficult and it did work

jamesmartin · Feb 1, 2013

fett said:
I know a guy who took out vm liners that way but luckily they have a top hat on them already so putting the new ones in was not so difficult and it did work

and they are wet liners not dry

sandyt · Feb 1, 2013

Right I had a mate over who is an aircraft engineer who is of the opinion that I am being paranoid and that the liners havent slipped he also pointed out that the two are nos 2 and 4 and the heat was between 6 and 8 anyway he has convinced me to have the heads skimmed think this is the last one not a lot of meat on there and reassemble so my cost is a head gasket and bolts so going to try it as when I did the rebuild forgot to put the engine lifter on the back of the thead oh and I also believe in fairies and santa clause.
Will keep you all posted on outcome but am ready to replace the liners or block

griffman · Feb 1, 2013

Good luck Sandy

hope it works out ok

FYI there is a GEMS 4.0 large-journal engine on Ebay for 1200 pounds which has top hat liners fitted by turner engineering (they use ductile iron for their liners)and has only done 8000 miles........................might be worth buying it as a backup - if your solution works then you can sell it on - you won't lose money.

If you do end up fitting it you can get the Tornado chip done and it will perform like a 4.6 anyway. The ancilliaries you can sell as well or keep for spares.

Just a thought.

Mr Noisy · Feb 1, 2013

Yep, fingers crossed pal

Sometimes risking it is the only sensible option!!

Turtled · Feb 2, 2013

When I did mine just over a year ago, quite a few folks on here were saying "cracked block, get new liners", but I decided to get the heads skimmed and do a gasket job on it - ARP head bolts and all that. I decided I'd chance it was just a head gasket failure (even though to my eye they looked ok when I got them off), rather than the full top-hat liner job.

There was more than one reason why I'd have been justified in suspecting slipping liners - I too had a slight 'lip' when I ran my fingernail across the top of the block to the liner, and the slight appearance of a steam-cleaned cylinder. I still figured I'd chance it.

The bottom line - I saved myself a fortune, and a load of hassle. After it all went back together it has run great (apart from the misfire I've had recently). I've not had a single overheating episode, the top hose is now 'normal' pressure. Just a gasket job solved it all.

Car is a 2000 4.6 P38.

Just thought I'd chuck my experience of it in to the hat....

POAH · Feb 2, 2013

griffman said:
If you do end up fitting it you can get the Tornado chip done and it will perform like a 4.6 anyway

no it won't

fett · Feb 2, 2013

he he missfire,clean plug?

The Ferkin BoB · Feb 2, 2013

sandyt said:
Could make a few quid if I can work out how to do it in car

im sure as a child i watched a block liner fitted to a bus with the engine still fitted in place,it was an old ford straight 6 engined bus if i remember right.
mobile fitters did it

jamesmartin · Feb 2, 2013

The Ferkin BoB said:
im sure as a child i watched a block liner fitted to a bus with the engine still fitted in place,it was an old ford straight 6 engined bus if i remember right.
mobile fitters did it

it would be cast iron block and not the interference fit as v8 liner ,v8 liners are bored to size once fitted

The Ferkin BoB · Feb 2, 2013

jamesmartin said:
it would be cast iron block and not the interference fit as v8 liner ,v8 liners are bored to size once fitted

ahh that makes sense,

so big boat engines etc are rebored etc on site then ? would i be right in thinking alloy blocks have to be bench fitted?

Slipped liners? advice please

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