Brand new user to the forum and looking for some advice. I have a 2014 LR4, 3.0 SC that came home running very poorly making a bunch of noise. Checking the codes there were multiple misfires logged on bank 2, camshaft position sensor errors, crankshaft position errors, etc. I changed plugs, coils and all 4 camshaft position sensors with no improvement. Ended up sending the truck down to the dealership and long story short they said it probably jumped timing and when checking cylinders 4 and 5 they could see the exhaust valves were bent. The guidance from the dealership was to replace the engine because they were unsure of there was damage to the crankshaft or connecting rods… it would be ~35K to fix with a remanufactured engine. I had the car towed back home and figured I would try to fix it myself. I’m at the point where I’ve removed the supercharger, valve covers and timing covers on both sides - planning to install new timing chains and guides once I get the head off to see what the situation is with the valves. Chain was definitely loose on the drivers side but I noticed that the intake camshaft was broken, just after the first valve on #4 its sheared into two pieces. The other 5 intake valve have not been operating so I’m not sure where to go from here. My thoughts now are to find another head on eBay or somewhere and fix the timing components to see what happens. Is this a good plan or should I be shopping for a new engine instead? The current engine has just over 70K miles so this seems really early to fail in my mind. Tomorrow I was going to pull off the main pulley and get the lower timing covers off to see what else is broken in there causing all the slack…. Really just looking for some guidance or opinions here on whether or not changing the head out and fixing timing is a sound choice or if swapping out the motor is the right path. Thank you!

 

Good to see the post is getting some views, hoping for some guidance too - as an update I purchased a used head with cams off eBay, plan is to R&R and see what happens. Looks like the chain tensioner failed as root cause, the piston in it just fell out when removing the chain and guide, the other side seems to be ok.

 

You have it at home and you've started taking it apart, so I would keep going. If if were my rover, I'd treat ir like I was doing head gaskets, install t he head bolt inserts in the block, plan to replace the timing set. If you don't have a time constraint, you might pull the head and see if you can replace the bad valves, and check the pistons as they may be damaged also.
$35K for a new engine though, I wouldn't put that much into it. That buys you s pretty good Discovery or a really good LR4.

 

Thanks for the response and guidance. Much appreciated, I have the head off and sure enough all six exhaust valves were bent. The intake camshaft was broken oddly the pistons and cylinder walls all look fine. I can’t see any dents or dings are really any damage at all . I’m going to have a head shop work on the seller head and fix it up and put it back together and fingers crossed it will all work out

 

35k is the price tag representing they don’t want the work.
I am surprised that the intake crankshaft has cracked. Tell us, what was your oil change schedule? How many miles on the vehicle?
Anything to help others avoid this scenario.

In your case, it seems you got off lucky.
Best of luck.

 

The head gasket replacement thread just a few down from this one has pretty much all the advice a person would ever need. I just need to find that nice local LR4 with the bad gaskets and a low price.
I have to say that your experience with bent valves but no damage to cylinders or pistons is good to see. Timing problems are not an automatic death sentence. It does seem like a ton of involved work but the reward is definitely worth it.