CSL crankshaft bearing shell

[alexk]

Originally Posted by Bounce

Just change the oil more often lol

I change it every 3000km.

[0-60Motorsports]

BE bearings will be releasing their new bearings for the S54 soon. Check out their site for more info. I'll be getting a set.

[cslsuperfan]

Originally Posted by alexk

So what is the recommendation ?
How often should the bearings be changed ?

Alex

I changed mine @ 66,500 miles and then had the HG checked & compression checked as I'm reliably informed the shell change can bring on HG issues.

[Chad]

Reading through posts,Mines on 66500 now. all ready have shells, head gasket shims bolts etc, ready to go in when I get time, was thinking why not do rings at the same time, Anybody done this? And did they notice much difference in performance worthy of the extra cost of rings ?

[select]

I never heard about an issue with the Headgasket which would warrant a change as early as 60.000miles. Seems a bit excessive to me?

[GregorFuk]

I read in the Bentley manual that these heads should never be skimmed, probably because in doing so you will raise what is an already high compression ratio. So what I’d really like to know is if people are having their heads skimmed when they voluntarily lift them to do the head gasket?

On the instances I’ve had heads off previous engines they have been warped due to overheating and have always required a skim. If you have seen no ill effects and are just lifting the head to pop a new gasket in then I wonder does this still need doing?

[Monkey]

Originally Posted by select

I never heard about an issue with the Headgasket which would warrant a change as early as 60.000miles. Seems a bit excessive to me?

The earliest I've changed a failed S54 head gasket was 47000 miles

Gregor, the headgasket failure on these engines does not appear to be as a result of excessive temperatures, therefore warping of the head is not an issue, and skimming is not necessary. I always check the head and block with a straight edge and never had an issue (others may have).

These gaskets fail between the cylinders, firstly between the end clyinders 1&2 and 5&6, if left I've seen a couple with it blown between every cylinder!

When the head gaskets fail it's the block that seems to take the hit, it starts to burn away where the hot gases are passing across the failed gasket into the adjoining cylinder.

I've got a CSL here currently with a failed gasket, I'll post up some pictures when I'm replacing it to illustrate what I mean.

And no, the heads most definately should not be skimmed!

[Chad]

Originally Posted by Monkey

The earliest I've changed a failed S54 head gasket was 47000 miles

Gregor, the headgasket failure on these engines does not appear to be as a result of excessive temperatures, therefore warping of the head is not an issue, and skimming is not necessary. I always check the head and block with a straight edge and never had an issue (others may have).

These gaskets fail between the cylinders, firstly between the end clyinders 1&2 and 5&6, if left I've seen a couple with it blown between every cylinder!

When the head gaskets fail it's the block that seems to take the hit, it starts to burn away where the hot gases are passing across the failed gasket into the adjoining cylinder.

I've got a CSL here currently with a failed gasket, I'll post up some pictures when I'm replacing it to illustrate what I mean.

And no, the heads most definately should not be skimmed!

. Hi monkey what are your thoughts on doing rings at same time as head gasket and shells , really not much more of a job to pop some rings in, regarding restoring lost power on these old motors due to wear, against extra cost of rings, think about £150 a set also has anybody done a recent dyno on a 13 year old csl to see how these old girls are doing..... Ps there's nothing wrong with My motor just a thought as I've already got all parts, bar the rings

[GregorFuk]

Originally Posted by Chad

. Hi monkey what are your thoughts on doing rings at same time as head gasket and shells , really not much more of a job to pop some rings in, regarding restoring lost power on these old motors due to wear, against extra cost of rings, think about £150 a set also has anybody done a recent dyno on a 13 year old csl to see how these old girls are doing..... Ps there's nothing wrong with My motor just a thought as I've already got all parts, bar the rings

You'd have to hone the bores if you fitted new rings I think. Otherwise they would not bed in and you'd burn oil.

I'd have thought that as long as the engine is showing good compression and the clearnaces are good the engines should be on the money. Might be worth having the injectors cleaned. And I guess if the head is off you could lap the valves.

[Chad]

Originally Posted by GregorFuk

You'd have to hone the bores if you fitted new rings I think. Otherwise they would not bed in and you'd burn oil.

I'd have thought that as long as the engine is showing good compression and the clearnaces are good the engines should be on the money. Might be worth having the injectors cleaned. And I guess if the head is off you could lap the valves.

Hi,yes have thought about all this, would do valve seals at the same time, probably All a bit over the top on a 65 k mile car , but to be honest I get just as much fun out or ripping it to bits now as driving the Csl , really like it to be at its very best,