Crankshaft repair

[jeboa]

Anyone ever had a crankshaft repaired that has badly worn journals?

I have a crankshaft with a big end journal that is worn beyond the point that it can be reground.

I've read a few mixed reviews over metal spraying/submerged welding - just wondered if anyone has had something like this done before - or can recommend a good engineering firm?

[Loubaruch]

If it is for the standard Griffith V8 I would have thought you would be far better getting a new or decent SH crank rather than mess about trying to build up your current one. They are not exactly rare, probably work out less expensive as well.

[jeboa]

Was hoping for a repair as they are usually around the £1k mark

[Aussie John]

Years ago I had a Cooper S crank repaired in Australia [1966], I think it was ground down then hard chromed then polished. I ran it for a year or 2 with no problems.

[Steve_D]

jeboa said:

Was hoping for a repair as they are usually around the £1k mark

One minute, non specific, Google search find this at £600.
http://www.v8tuner.co.uk/product.php?id=43

Steve

[Boosted LS1]

I suspect it needs balancing though but still a reasonable price.

I've had a crank plasma sprayed that had good results. OP it's defo a route worth exploring.

[jeboa]

Steve_D said:

One minute, non specific, Google search find this at £600.
http://www.v8tuner.co.uk/product.php?id=43

Steve

Steve,

That's not a 500 crank - it's a standard 4.6 crank that has been offset ground which needs to be used with a 'top-hat' lined block and 96mm pistons.

A 500 crank is available on V8Tuner for twice the price:

http://www.v8tuner.co.uk/product.php?id=460

So you can see that an effective repair becomes an economic option.

[macdeb]

citizen smith said:

Having worked for many years in Engineering, which included Crankshaft/Engine Component Inspection (including crack detection of Cranks/Con-rods etc). My advice would be to throw the crankshaft away or have it as an ornament!, the wear limits on the crankshaft are there for a reason.

Short term savings may result in massive crankshaft failure (broken in two), with extreme damage to the Block and possible con-rods.

^^^^ this.