Oh Oh Cracked Liner Time
Discussion
Blimey Stuart I thought you had an engine rebuild not so long ago? Someone was doing TopHats for £700 IIRC, seems to be £100 a single liner but you get discount for a job lot 
Theres a couple of engineers in Cov, and 1 in York (handier for you unless you have left Gods country) that have done them I believe.
If you want Gimme a shout & I'll tell you where the threads are with the info (don't think its on here?).
Theres a couple of engineers in Cov, and 1 in York (handier for you unless you have left Gods country) that have done them I believe.If you want Gimme a shout & I'll tell you where the threads are with the info (don't think its on here?).
I can honestly say that Holts WondarWeld did solve the problem with my car . . .
Car suffered from new and bought it from first owner who didn't inform
me on the problem (only 9OOO km)
ETA: had to repeat the procedure once . . . Now 28000km . . . Touch wood!
I thought that if this didn't cure the problem it would not harm either . . .
If problem persist I'll upgrade to newly built 5.O or 5.2.
Anyone experience with these blocks?
Car suffered from new and bought it from first owner who didn't inform
me on the problem (only 9OOO km)ETA: had to repeat the procedure once . . . Now 28000km . . . Touch wood!
I thought that if this didn't cure the problem it would not harm either . . .
If problem persist I'll upgrade to newly built 5.O or 5.2.
Anyone experience with these blocks?Filos Hippos said:
I can honestly say that Holts WondarWeld did solve the problem with my car . . .
Car suffered from new and bought it from first owner who didn't inform me on the problem (only 9OOO km)
ETA: had to repeat the procedure once . . . Now 28000km . . . Touch wood!
I thought that if this didn't cure the problem it would not harm either . . .
If problem persist I'll upgrade to newly built 5.O or 5.2. Anyone experience with these blocks?
What were your symptoms?Car suffered from new and bought it from first owner who didn't inform
me on the problem (only 9OOO km)ETA: had to repeat the procedure once . . . Now 28000km . . . Touch wood!
I thought that if this didn't cure the problem it would not harm either . . .
If problem persist I'll upgrade to newly built 5.O or 5.2.
Anyone experience with these blocks?spend said:
Blimey Stuart I thought you had an engine rebuild not so long ago? Someone was doing TopHats for £700 IIRC, seems to be £100 a single liner but you get discount for a job lot Theres a couple of engineers in Cov, and 1 in York (handier for you unless you have left Gods country) that have done them I believe.
If you want Gimme a shout & I'll tell you where the threads are with the info (don't think its on here?).
Theres a couple of engineers in Cov, and 1 in York (handier for you unless you have left Gods country) that have done them I believe.If you want Gimme a shout & I'll tell you where the threads are with the info (don't think its on here?).
Yeah I know, it's not the luckiest car in the world. I did have a rebuild from a 4 litre because of.......a cracked liner!£700? That's not bad if it cures this problem, I have been looking at just putting a RR 4.6 in off Ebay. Where is the engineer in York?
Thanks
I'll dig it out & post for you... might not be this evening though (but everyone seems shut at the mo anyway ).
Top Hats won't go anywhere, and are sealed at the bottom, so porosity is solved as well! I'd consider hacking the jacket and run them wet if I ever had to have it done anyway
TCS was wanting to sell his 5.0 if you were wanting another engine, don't know if he sold it (or changed his mind?), you could ask.
).Top Hats won't go anywhere, and are sealed at the bottom, so porosity is solved as well! I'd consider hacking the jacket and run them wet if I ever had to have it done anyway
TCS was wanting to sell his 5.0 if you were wanting another engine, don't know if he sold it (or changed his mind?), you could ask.
I'd just add that people here are talking about 2 specific problems :
1) Cracks in the material behind the liner - this allows water to pass slowly up the block to the cylinder head and into the combustion chamber .. so symptoms are slow water loss and possibly even the lambda sensors failing (MIL light) as they hate anti freeze.
2) Liner slipped - this is were the liner in not properly located at the bottom of the block and eventually moves up and down with the piston ..
symptoms - sounds like a tappet or cam shaft is on its way out.. running with it like this for long would be a good way to scrap a block.
If anyone does go the 'Cos-cast' route - probably worth asking if they have top hat liners .. as I suspect they do not - so the problem may well still exist for them - long term.
1) Cracks in the material behind the liner - this allows water to pass slowly up the block to the cylinder head and into the combustion chamber .. so symptoms are slow water loss and possibly even the lambda sensors failing (MIL light) as they hate anti freeze.
2) Liner slipped - this is were the liner in not properly located at the bottom of the block and eventually moves up and down with the piston ..
symptoms - sounds like a tappet or cam shaft is on its way out.. running with it like this for long would be a good way to scrap a block.
If anyone does go the 'Cos-cast' route - probably worth asking if they have top hat liners .. as I suspect they do not - so the problem may well still exist for them - long term.
rev-erend said:
I'd just add that people here are talking about 2 specific problems :
1) Cracks in the material behind the liner - this allows water to pass slowly up the block to the cylinder head and into the combustion chamber .. so symptoms are slow water loss and possibly even the lambda sensors failing (MIL light) as they hate anti freeze.
2) Liner slipped - this is were the liner in not properly located at the bottom of the block and eventually moves up and down with the piston ..
symptoms - sounds like a tappet or cam shaft is on its way out.. running with it like this for long would be a good way to scrap a block.
If anyone does go the 'Cos-cast' route - probably worth asking if they have top hat liners .. as I suspect they do not - so the problem may well still exist for them - long term.
From what I've read I think they do, or at least they've addressed the problem.1) Cracks in the material behind the liner - this allows water to pass slowly up the block to the cylinder head and into the combustion chamber .. so symptoms are slow water loss and possibly even the lambda sensors failing (MIL light) as they hate anti freeze.
2) Liner slipped - this is were the liner in not properly located at the bottom of the block and eventually moves up and down with the piston ..
symptoms - sounds like a tappet or cam shaft is on its way out.. running with it like this for long would be a good way to scrap a block.
If anyone does go the 'Cos-cast' route - probably worth asking if they have top hat liners .. as I suspect they do not - so the problem may well still exist for them - long term.
Mine was misfire on startup and for first 10 miles (water in combustion chamber), masses of steam from exhaust for about 5 miles, rapid water loss, loads of water in oil.
Took it apart praying it was headgaskets, and they looked as new (only recently rebuilt), no burn marks, water marks, rust marks etc. So it's got to be either cracked heads or slipped/cracked liner. I can't believe that a cracked head could lose so much water in a short space of time without leaving some evidence, so I'm guessing the water is going straight through the liner(s). Yeah I should get both sent off to be tested, but it's more expense and I'm already a bit disheartened with it. It currently has v8developments stage 3 heads on, so my first plan was to just stick a RR 4.6 in and sell the heads to recoup some money, but if tophats are £700 I can stomach that and try and kill two birds with one stone. I might have another look at the block to see if I can see a liner out of place, nothing was apparent before.
This car seems to wait patiently for you to fix one problem and immediately develops another
Oh, I had a 6 month spell once when everything was fine!The slippered liner is the easiest to spot - as the liner literally slips below the block deck height.. by about 1/8 inch..
If it's a cracked behind the liner then that is usually spotted as one of the pistons will have been washed clean with the liner sometimes dropping by between 5 and 15 thou (inch) but not always.. also the liner will no longer be a tight fit because of the crack ..
If it's a cracked behind the liner then that is usually spotted as one of the pistons will have been washed clean with the liner sometimes dropping by between 5 and 15 thou (inch) but not always.. also the liner will no longer be a tight fit because of the crack ..
Stuart, you can try Performance Unlimited in York, seem to recall someone was pleased with their work (get the balancing done whilst you're at it IMHO), but I haven't personal experience of them
http://www.performanceunlimited.co.uk/Machine%20sh...
http://www.performanceunlimited.co.uk/Machine%20sh...
spend said:
Stuart, you can try Performance Unlimited in York, seem to recall someone was pleased with their work (get the balancing done whilst you're at it IMHO), but I haven't personal experience of them
http://www.performanceunlimited.co.uk/Machine%20sh...
Cheers spend will check them out.http://www.performanceunlimited.co.uk/Machine%20sh...
Although now I am thinking AJP v8
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