pistons and liners standard 10.5
- Thread starter Jens
- Start date
unstable load
Well-Known Member
Take a look at these guys.... http://www.westwoodcylinderliners.co.uk/
mtb_tuli
Active Member
Liners for a Rover V8 ?
Up to now I´m not really familiar with this engine, but I think, you cannot change liners on this engine, except blocks with "wet-type" liners.
Am I wrong ?
It would be interesting, because my engine showed a tack-tack-tack noise on its home transfer ride on the hottest day of the year. It disappeared, but in my opinion it could be a loose liner and what I´m reading about the Rover V8 means, throw it away..
Up to now I´m not really familiar with this engine, but I think, you cannot change liners on this engine, except blocks with "wet-type" liners.
Am I wrong ?
It would be interesting, because my engine showed a tack-tack-tack noise on its home transfer ride on the hottest day of the year. It disappeared, but in my opinion it could be a loose liner and what I´m reading about the Rover V8 means, throw it away..
liners involve machining but can be done... They are dry liners rather than wet liners though...
I believe liners slipping is common on the 4.6 where the really high temp stats are used but the 3.5 rarely suffers this issue because of the lower temp the engine runs at.
I believe liners slipping is common on the 4.6 where the really high temp stats are used but the 3.5 rarely suffers this issue because of the lower temp the engine runs at.
Hi Rich,
My understanding is that in terms of slipped liners, the most common capacity with this unwanted trait was the 4.0, followed by the 3.9, 4.2 and then the 4.6. For these large bore blocks, the reason the liners dropped was due to cracking of the metal behind the liners.
For the 3.5 litre engines, the metal behind the liners is thicker, so cracking is uncommon, but slipped liners do still occur. My understanding is that the 3.5 litre engines manufactured between 1997 and 1998 had an almost 100% failure rate in this regard, with the liners coming loose and then dropping down. These 3.5 litre blocks are easy to spot as they are drilled for 10 bolt heads only.
Ron.
My understanding is that in terms of slipped liners, the most common capacity with this unwanted trait was the 4.0, followed by the 3.9, 4.2 and then the 4.6. For these large bore blocks, the reason the liners dropped was due to cracking of the metal behind the liners.
For the 3.5 litre engines, the metal behind the liners is thicker, so cracking is uncommon, but slipped liners do still occur. My understanding is that the 3.5 litre engines manufactured between 1997 and 1998 had an almost 100% failure rate in this regard, with the liners coming loose and then dropping down. These 3.5 litre blocks are easy to spot as they are drilled for 10 bolt heads only.
Ron.
unstable load
Well-Known Member
As mentioned above, it's a result of running the engines at higher temperatures to get them past emissions tests coupled with tired tooling at the factory that allowed castings to have misaligned mould cores, machines that were a tad wobbly and lax quality control, all adding up to engines that dropped their liners in alarming numbers.
The solution is to fit "top hat liners" with a flange on the top of the liner that prevents the liner from dropping into the block, resulting in the overheating issues.
The solution is to fit "top hat liners" with a flange on the top of the liner that prevents the liner from dropping into the block, resulting in the overheating issues.