Early piston slap?

[12dan34]

Hi people, please can you have a listen to the video attached. This is my 1998 c2, i spent £4.5k on an engine rebuild after the ims started to break up (caught in time luckily), then a couple of months later it starts making this noise when starting from cold. In the video it hasn't been started for 3 days and as you can hear the noise goes away after less than a minute. The indy has told me it's early piston slap and will cost about £6k to put right!

It didn't do it before and i wonder if they've put different oil in it or something. Any ideas please?

Thank you.

https://www.youtube.com/watch?v=fsbiDLNx2KA

[Pugley]

It may not be the worse of 2 evils

Piston slap V Hydraulic tappet.

If it goes away completely after starting it could just as easily be due to the time the tappet takes to fill with oil?

If it occurs under load it is more likely Piston Slap.

[bgunn]

Sounds like mine when it's stone cold. I think it's a lifter, or cam chain tensioners.

I've had the car and driven it pretty hard for 6 months and 6000 miles, it hasn't used a drop of oil in the time since I changed it, and doesn't appear to smoke. I'd argue that if it was scuffed liners/pistons that have picked up there'd be oil usage and the issue would deteriorate.

Plus early cars (like mine) have ferrous coating on the piston skirts too.

What oil does it have in it? I've got Mobil in it, I'm going to fill it with the Hartech recommended 10w50 Nano tech in the next couple of months.

[12dan34]

It certainly doesn't get worse under load. It has Mobil right now but I've read elsewhere that it's not the best so I'll try that nano one in the next couple of weeks.

I have since read that changing to one of these other oils can cure it completely and significantly reduce all noise on startup which can only be a good thing.

Thanks for looking guys.