Rover V8 Liners

[neal1980]

I have just bought a cheap 4.6 cross bolted / large journal block and im sure it will have the slipped liner / over heating problem that most of these have. I am looking at getting Top hat liners fitted can anyone recommend a place and whats the going rate??

Cheers

[Del 203]

Probabaly worth a chat with V8 Developments

[spend]

Don't be so sure, I've had 2 of those, & they are both fine. Its a nice easy diagnosis & money earner + some folks seem to want the bragging rights "I had a slipped liner"

IIRC there are a couple of engineers in Coventry/Brum that will TH blocks, prob on the V*forum, which would be a bit handier for you.

[neal1980]

Cheers Dave, I will strip it down and get it checked then. I hope its ok but you never know. Were yours the later block cross bolted?

And I am probably opening a can of worms but what do you think actually causes this failure, been scanning the net but nothing much. Weak fuel map???

Cheers
Neal

[350Matt]

Part of the problem is hot running as the engine in the Range rover runs at 90° to help with emissions, in hot traffic this can easily reach over 100° being as the castings were marginal on wall thickness on a lot of blocks (bore size been somewhat stretched over the years) then there isn't a lot of grip on the steel dry liner.

Matt

[neal1980]

So if i get the block pressure tested and all seems good, as I am already running a megasquirt i could keep it nice and rich like the old TVR map and this could stop this from happening?? Im thinking alloy rad and lower stat also.

Cheers
Neal

[AntonyJ]

spend said:

Don't be so sure, I've had 2 of those, & they are both fine. Its a nice easy diagnosis & money earner + some folks seem to want the bragging rights "I had a slipped liner"

IIRC there are a couple of engineers in Coventry/Brum that will TH blocks, prob on the V*forum, which would be a bit handier for you.

http://www.chesmanengineering.co.uk/ are in Cov, speak to Andy, very nice guy...

Edited by AntonyJ on Monday 10th November 18:56

[GreenV8S]

Running rich could introduce its own problems due to bore wash, and will cost power as well.

[rev-erend]

There were several problems..

1) it happens as a result of over heating

2) when 1) happens - the liner(s) can often slip down - as they were not given a final push down as they was cooling during fitment at Land Rover.

3) Blocks of various grades were available .. the thinner blocks suffered more problems.

LR must have known that top hat liners would cause less issues but extra cost and penny pinching stopped their use.

FYI - There are 3 grades of block, Blue, Yellow, Red.

The paint colour dab is in the vee grove near the cam shaft.

If you have a 4.6 x bolt - it's probably yellow (middle grade) .. that's a good thing.