![]() | Home > Technical (L405) > All I want for Christmas..... is a new Engine |
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4RRS Member Since: 13 Apr 2022 Location: Crudgington Posts: 300 ![]() ![]() ![]() |
So finally got around to looking at my poorly engine. Decided to pull it and see what damage has been done, hopefully as it was still running and the knock sounded like a big end as opposed to a main bearing it maybe salvageable.
Awful lot of pipe work, even once the Radpack is out of the way.
Had another couple of hours on it yesterday and here it is!
Left a big wide empty engine bay to stare at!
At this point we decided on pulling all ancillaries to amke it a bit easier to work with, it's a heavy old thing.
As we were doing quite well and no disasters, I couldn't wait any longer to get the sump off to see waht had failed, so here it is!
On removing cylinder 3 big end cap you could clearly see that the shell had spun about 10 degrees, obviously enough to restrict the oil supply. The lower shell had more wear than the upper and had picked up on the crank journal. Plan is to get the bottom end over into a mates workshop as he has a parts hot washer and machining facilites. Gonna pull the crank and go for a regrind, quickly checking I see that King Bearings go upto 25 thou o/s, so should be plenty of meat to work with. Obviously a good degrease and a few hours in the parts washer to make sure it's all clean. Only thing I'm not sure about at the moment, is whether I pull the heads off or not as the workshop manual states they are not machineable and there are only standard gasket sizes available. Max deviation measured diagonally is .2mm, so If I pull them and they exceed this figure, I'm then in for a couple of heads - going to weigh up the pros and cons, once it's a bit more stripped. Any comments, tips or suggestions would be very welcome! All the best Mike L405 SV Autobiography LWB SDV8, finished in Aston Martin China Grey by ETO division. |
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Tinman Member Since: 22 Mar 2017 Location: kent Posts: 1210 ![]() ![]() ![]() |
Watching with bated breath, Please keep us updated. |
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fisha Member Since: 25 Sep 2009 Location: Scotland Posts: 1473 ![]() ![]() |
For the reason that Craig mentioned earlier, I’d strip and clean it and put it back together to have peace of mind of no bits of metal lying about.
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4RRS Member Since: 13 Apr 2022 Location: Crudgington Posts: 300 ![]() ![]() ![]() |
If I get a bit of time tomorrow, I'm going to pull the crank out, inlet manifolds, cams & followers etc. and give it a good wash through in the cleaner and see what it looks like. Ultimately if I need to take the heads off to be happy that's what I'll do.
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fisha Member Since: 25 Sep 2009 Location: Scotland Posts: 1473 ![]() ![]() |
Sounds like a plan. Good luck . V8 or else ... |
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GraemeS Member Since: 07 Mar 2015 Location: Wagga area Posts: 2653 ![]() ![]() |
You might want to see if bearing sets are available with 1 side notched to then have the caps notched. I understand they're available for the TDV6. |
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4RRS Member Since: 13 Apr 2022 Location: Crudgington Posts: 300 ![]() ![]() ![]() |
That's a good idea, the ones I've managed to find so far are however as per standard design. I'll keep looking |
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4RRS Member Since: 13 Apr 2022 Location: Crudgington Posts: 300 ![]() ![]() ![]() |
So, it's been a while.... some good and some bad news!
Righthand bank
Crank in with Std size King main and big end bearings, heads on, crank locked against timing pin and cams locked in place (all with the Lazer 7676 Timing kit).
Lefthand Bank cams locked at TDC.
Righthand Bank cams locked at TDC.
Brought the engine home on Friday after work and continued for a few hours today (Saturday), added genuine LR timing chains, tensioners and guides and timed it up. Could not get any of the other required special tools aftermarket so had to invest in the LH bank sprocket locking tool (JLR-310-247).
Timed up the HP fuel pump ready for assembly with tool JLR-310-248, apparently a lot of people don't bother timing it but as it is a 2 port pump (similar scenario to the SDV6 pump) it should be timed to make sure the correct bank is on pressure, otherwise it can lead to rough idle and poor mpg.
That's it for today, other duties to complete for SWMBO, hopefully I'll then be free all day tomorrow to finish the build. Any comments or advice, please feel free to chip in! L405 SV Autobiography LWB SDV8, finished in Aston Martin China Grey by ETO division. |
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DrF Member Since: 30 Jun 2014 Location: South East Posts: 1466 ![]() ![]() ![]() |
Wow, hat off to you sir, looking good. |
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4RRS Member Since: 13 Apr 2022 Location: Crudgington Posts: 300 ![]() ![]() ![]() |
Thanks DrF, I'm kinda enjoying the project, not so much the wallet drain however! L405 SV Autobiography LWB SDV8, finished in Aston Martin China Grey by ETO division. |
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4RRS Member Since: 13 Apr 2022 Location: Crudgington Posts: 300 ![]() ![]() ![]() |
Just in case any unfortunate person ever treads this path again, here's a list of parts I've replaced, all as per Topix assembly guidlines. I'm sure some parts could be skipped, but I'm going by the book and hoping for a problem free future!
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GraemeS Member Since: 07 Mar 2015 Location: Wagga area Posts: 2653 ![]() ![]() |
Have you considered fitting a sensor for an oil pressure gauge whilst easily fitted, even if you wouldn't normally have a gauge fitted?
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Richie N Member Since: 29 Dec 2023 Location: Kent Posts: 363 ![]() ![]() ![]() |
Well done 4RRS 👏🏻 great work and thread 👍 |
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Red Hot one Member Since: 09 Dec 2018 Location: Herefordshire Posts: 195 ![]() ![]() ![]() |
Brilliant thread, |
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