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  1. Red Top Engine

    Replacement engine

    Not true. Unlikely for a block to warp. A good machine shop will know the limits of how far they can mill the heads if they are warped. And if the heads are toast (say cracked or bearing shot), buy another on ebay and get it conditioned it at a machine shop. It is far cheaper than replacing an...
  2. Red Top Engine

    LR4 Restricted performance, rough idle

    I've experienced similar fault with the MAF sensors, having to regularly clean them, progressively got worse and eventually replaced both.
  3. Red Top Engine

    P0301- Cylinder 1 misfire. Restricted Performance. Rough idle under Load. 2012 LR4

    Found the problem: Bad Coil. The cylinder 1 plug did have a little oil on it but it didn't make a difference in engine performance after putting new one in. The moment I replaced the coil pack (on cyl 1), stumbling & hesitation stopped. Swapped around with a spare twice to confirm. These coils I...
  4. Red Top Engine

    Can anyone identify this slow ticking noise?

    Fan Clutch for sure. Mine has been it for 3 years.. still works.
  5. Red Top Engine

    P0301- Cylinder 1 misfire. Restricted Performance. Rough idle under Load. 2012 LR4

    Will swap the coil pack- test- replace all plugs & test and finally replace the injector. Keep you posted!
  6. Red Top Engine

    P0301- Cylinder 1 misfire. Restricted Performance. Rough idle under Load. 2012 LR4

    Trying to get to the bottom of this gremlin: On cold startup, the engine will idle rather rough. Under load, it will hesitate a climb. Check engine light will flash, go into restricted performance mode. On restart, it will operate but still somewhat sluggish. Engine performs better after it was...
  7. Red Top Engine

    Replacement engine

    christine1125: A blown head gasket does not need an engine replacement. The head gaskets along with many other preventative maintenance components can be replaced at a fraction of the cost of replacement engine.
  8. Red Top Engine

    LR4 Restricted performance, rough idle

    Have you obtained any of the codes? Please keep us posted as to what the results of replacing the throttle body are. Mine began to go into restricted performance mode on cold start up, cylinder 1 misfire. The check engine light would blink, then stay steady. I don't get the HDC and e-brake not...
  9. Red Top Engine

    LR4 Restricted performance, rough idle

    Having similar issue, Cylinder # 1 missfire and restricted performance. I'm wondering if yours potentially has anything to do with the battery? These trucks are power hogs and batteries don't last.
  10. Red Top Engine

    SCV6 overheated and then catastrophe

    It doesn't take long to overheat the engine. A leak in the cooling system will allow for air to get into the system, which would turn into steam which your secondary temp sensor will not be able to decipher actual temp. How does air get it? A compromised/leaking head gasket, potentially caused...
  11. Red Top Engine

    Before Top Dead Center

    Yes, you can use the kebab stick, or look through the crank timing port for the enlarged gap as someone slowly rotates the engine. If you use a rod, kebab stick, or whatever on the cylinder... be careful it doesn't get stuck. I had a telescopic rod get stuck using this technique and had to...
  12. Red Top Engine

    Before Top Dead Center

    TDC is attained using two special tools that temporary lock the crank in place. One is locks into the flywheel flex plate, the other into the oil vacuum pump. Both locks can go in only one way. If they don't slide right in, you're not at TDC.
  13. Red Top Engine

    Heated windshields

    So it turns out the issue was the the passenger side connections, just as some of you have pointed out. They were plugged in but not maintaining contact. After unplugging and plugging back in and checking for continuity, it works! Also, the windshield warms up enough to be able to feel it on...
  14. Red Top Engine

    Heated windshields

    Thanks for all the input! I hope to get to it this weekend. Will run a test via multimeter and keep you posted.
  15. Red Top Engine

    Heated windshields

    The windshield is original and in good condition. I removed both A pillar trims and it appears the straps are all plugged in.
  16. Red Top Engine

    Heated windshields

    Reading through the forums.. still no solution to why mine doesn't work at all. Both 40amp fuses are fine, connectors are fine. I read somewhere the brown and green wire coming out of the battery may have something to do with it.. can someone ID what that wire is for? Mine is coming out of the...
  17. Red Top Engine

    2012 LR4 - Clunk at low speeds in 1st gear

    Control arm bushings. Given the weight of the vehicle, they don't last as long as in a lighter vehicle. I've had to change mine every 2 to 3 years.
  18. Red Top Engine

    Looking to buy this LR4, but rattle at cold start. Goes away when warm...

    Never heard of crank failure aside from worn out bearings. I had to replace my crankshaft due to oil starvation, it was damaged beyond repair. Finding a replacement part globally was incredibly difficult. I found one in Bahrain for $1k. Lucked out finding a bottom end of the engine at a local...
  19. Red Top Engine

    Looking to buy this LR4, but rattle at cold start. Goes away when warm...

    Made this vid that might help:
  20. Red Top Engine

    Looking to buy this LR4, but rattle at cold start. Goes away when warm...

    There’s a lot of engineering and moving parts associated to that engine, and I would replace them and more at this time if there’s any doubt. The timing chains tensioners are known to fail. Share the vids you mentioned.
  21. Red Top Engine

    HELP!! Engine trouble.

    The engine can be rebuilt. The damage is to the exhaust valves that can be replaced. This is a better option than replacing engine and potentially inheriting the same fait.
  22. Red Top Engine

    Looking to buy this LR4, but rattle at cold start. Goes away when warm...

    Check the vibrations on the main serpentine belt tensioners using a stethoscope. Hydraulic chain tensioners are plausible culprits.
  23. Red Top Engine

    Best roof rails and roof rack?

    After nearly a year of considering which rack to go with, I narrowed it between a Gobi rack and ProSpeed. Pulled the trigger on the ProSpeed rack due to it's ultra low profile (which I need to sneak into my garage). My complaint about the ProSpeed rack: The tubing isn't rigid enough. Secondly...
  24. Red Top Engine

    Steering shaft replacement

    Any idea how prevalent are steering rack failures on LR4's? I'm going to replace mine - debating between a used vs new.
  25. Red Top Engine

    Battery Management System & power discharge leak

    The battery is 6 months old. I noticed the starting problem started 3 months after replacing the battery and alternator with a OEM used one. My voltages are as follows: Off: 9.68 Running: 14.3 While starting: 7.3 (I was lucky to get is started without jumping it this time) There is a draw on...

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