R8CGT

Seems you can't have more than about ten attachments! I've put the full write up in a blog post and linked to it from my earlier post.

Thanks Komain. I'll look out for that. Cheers.

I can no longer see half of the pictures on my post. If it's the same for everyone then I will find somewhere else to post it and add a link.

Cheers for the comments. But you were the pioneer! I bought the GS a couple of months ago. It had been stood a few months. After driving it a short distance it died on me. Then after restarting it did the same again. I limped it to the Lexus dealer for a hybrid health check. They listed the fault codes for me. And the estimated prices for the repairs which came to more than I paid for the car! I searched around and all roads pointed to Richard at hybrid battery solutions in Northampton. I left the car with him and he pointed out that he could repair and recondition the battery for me but the gearbox oil pump issue meant that the battery management wouldn't be exercising the battery correctly and the guarantee would be invalid. It was probably a partially seized pump bearing and being stood so long that had killed the battery in the first place. Whilst Richard did the work on the battery he gave me the additional option to install a port to attach a battery conditioner unit. I thought that I plan to keep the car quite a few years and it might save me a couple of trips to Northampton. You can attach the conditioner and plug it into the mains overnight. Or for up to 39 hours. Or leave it on a timer one hour a day if you go on holiday. I'm hopeful that now the oil pump is fully working I won't need the conditioner too much. But it's good to know that I have it. Have a look at Richards site on the web or his eBay page. There should be more info there. And I think he's subscribed to this thread and will probably come along and correct some of my info! He's a very knowledgeable guy.

Edited to replace step by step write up with a blog post: Many thanks to Hayne, without whom I would have bunged this into a dealer and probably spent 7-800 pounds on a pump or £3k on a transmission. If you have the P2797 code and suspect the pump bearings it's worth a go. Armed with some car lifting kit, new transmission oil and bearings for both ends of the pump I carried out the pump repair over the weekend. Also used basic tools, spanners, oil drain tray and a pump for squirting the new oil in. Allow a full day but if you're very mechanically minded with a good set of tools you might half it. Photos and steps attached: http://carlthomas66.blogspot.co.uk/2016/03/lexus-gs450h-transmission-oil-pump.html Took me twice the time Hayne did but I didn't have a ramp. So allow a day at least depending on access, tools and mechanical skill. Test drive it. Do a lot of gentle battery only driving to make sure the pump gets a good run and look out for dash warnings. Then a final check with the Mini VCI if you have it and hopefully no more P2797. Take it for a long run. I blasted mine up to Stansted and back to pick up the girlfriend! Brave I know! Then celebrate with a beer. After you park up the car! I did! Good Luck!