1999 P38 4.6l wont crank after head gasket replacement
  1. Welcome to RangeRovers.net – General discussion forum for Range Rovers

    Welcome to RangeRovers.net - a website dedicated to all things Range Rovers.

    You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, Join RangeRovers.net today!
     
+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 15 of 16

Thread: 1999 P38 4.6l wont crank after head gasket replacement

  1. #1
    FRESHMAN ROVER
    Join Date
    April 7th, 2019
    Posts
    6

    1999 P38 4.6l wont crank after head gasket replacement

    Hey guys,

    New to the forum and to Land Rovers. I picked up a 1999 P38 that needed head gaskets and a starter. I completed the starter replacement first, and after I finished the job it cranked just fine. Then went ahead with the head gasket replacement, put everything back together and now I can't get it to crank. I do get some relays clicking. Double/triple checked the connections at the starter and remade to connection to the solenoid. It doesn't appear to have any connections that I missed. The main ground was untouched. Battery is new and charged.

    The mistake I might have made: the rover had some old gas in it, so instead of siphoning i decided to turn the key to on, enabling the fuel pump to pump the remainder of the gas into a 5 gallon bucket. That didn't work so we ended up siphoning. Now I believe I may have made the ECM mad because I turned the power on with many electrical sensors disconnected, and now I am in lock mode.

    Your guys thoughts?

  2. Remove Advertisements
    Range Rovers Forum
    Advertisements
     

  3. #2
    FRESHMAN ROVER
    Join Date
    April 7th, 2019
    Posts
    6

    Re: 1999 P38 4.6l wont crank after head gasket replacement

    Update: Looks like the starter solenoid connection was on the wrong spade. It now cranks, but no spark.

  4. #3
    SENIOR ROVER
    Join Date
    June 11th, 2016
    Location
    northern va 22003
    Posts
    1,335

    Re: 1999 P38 4.6l wont crank after head gasket replacement

    are you sure it is not immobilized?
    2k p38 4.6
    95 lwb 4.6
    01 d2 4.0

  5. Remove Advertisements
    Range Rovers Forum
    Advertisements
     

  6. #4
    SOPHOMORE ROVER xrav22's Avatar
    Join Date
    December 15th, 2014
    Location
    Southern Ca.
    Posts
    335

    Re: 1999 P38 4.6l wont crank after head gasket replacement

    Once mi 97 became immobilized(I think the drivers door lock was just starting to get funky) so I was able to turn on the power roll the windows down a little then use the key to turn left to unlock position then hold right to roll up all the windows and it reset everything.
    Good luck
    1997 Range Rover 4.6 HSE
    1985 Chevy Corvette 5.7 TPI
    Nano Evolution II(fixes=paid for itself)
    4x SrS reset with nano
    P0183 changed fuel temp sensor OK
    P1179 cleaned maf with maf cleaner OK
    P1314 reset CEL OK (was going thru large puddles when CEL went on).
    Service Engine reset/Adaptive values reset

  7. #5
    FRESHMAN ROVER
    Join Date
    April 7th, 2019
    Posts
    6

    Re: 1999 P38 4.6l wont crank after head gasket replacement

    Thanks for the info, how long do you hold it in the lock and unlock position? I ended up getting it running, it was running really smooth. Decided to take it out one night to get a better comfort level that everything was fixed. Got down the street and it died, seemed like it lost electrical power, got a bunch of error codes. Now I have two good batteries fully charged, new alternator and starter, most of the relays are new and I cannot get it to crank again. The only error I see constantly is a gearbox fault. Checked all of the connections at the BECM, one seemed loose, tightened it, no change. Any ideas?

  8. #6
    FRESHMAN ROVER
    Join Date
    April 7th, 2019
    Posts
    6

    Re: 1999 P38 4.6l wont crank after head gasket replacement

    The drivers side door lock is also funky, sometimes I can hold it in the unlock position, then move it to lock and it will lock the car. Sometimes it won't, seems fairly haphazard.

  9. #7
    JUNIOR ROVER
    Join Date
    October 17th, 2017
    Location
    East England
    Posts
    732

    Re: 1999 P38 4.6l wont crank after head gasket replacement

    Replace the door latch before it locks you out completely. There's 3 microswitches in the latch and when they start to die you can end up will all sorts of grief. Gearbox Fault is the first one that comes up with low battery voltage. Check the battery terminals are good otherwise you are probably looking at a replacement under bonnet fusebox.
    97 4.0SE
    98 4.0 Police spec
    and a number of others I maintain for the owners.

  10. #8
    JUNIOR ROVER
    Join Date
    June 2nd, 2013
    Location
    harlow, essex, uk
    Posts
    720

    Re: 1999 P38 4.6l wont crank after head gasket replacement

    Either a faulty connection somewhere, or earth missing,, did you put both back, 1 on right hand head at rear, other to side of block,, ( presuming that that battery stays same place as rhd vehicle)

  11. #9
    FRESHMAN ROVER
    Join Date
    April 7th, 2019
    Posts
    6

    Re: 1999 P38 4.6l wont crank after head gasket replacement

    Chris,

    Thanks for the help, I measured the voltage coming into the starter solenoid and I am getting a couple of millivolts to the starter(12.3v at the battery) when they key is on start, so I ordered a new fuse box. Hopefully that will be the cause. As for grounds, if memory serves me correct, I touched the ground on the back of the head, ground on the battery terminal, and the ground on the alternator to do the heads. The main ground appears to go to the passenger side shock tower. The connections were all bent up so I fixed those and scraped off some paint to make sure I had a good ground. Hopefully everything will get sorted out with the fuse box. Let me know if you believe I missed a ground.

  12. #10
    JUNIOR ROVER
    Join Date
    April 24th, 2006
    Location
    Northern California
    Posts
    851

    Re: 1999 P38 4.6l wont crank after head gasket replacement

    12.3 at the battery isn't enough, P38's need juice. Before you do anything else, make sure you have a good battery fully charged and sized properly for a P38. You can spin the engine with low voltage but not fast enough to fire. Your fusebox may be bad, but that usually manifests with blown relays, not hard starting.
    '99 Range Rover HSE
    '02 Audi S6

  13. #11
    Premium Member Escape's Avatar
    Join Date
    June 4th, 2007
    Location
    Belgium
    Posts
    1,172

    Re: 1999 P38 4.6l wont crank after head gasket replacement

    Quote Originally Posted by NorCal RR View Post
    12.3 at the battery isn't enough, P38's need juice. Before you do anything else, make sure you have a good battery fully charged and sized properly for a P38. You can spin the engine with low voltage but not fast enough to fire. Your fusebox may be bad, but that usually manifests with blown relays, not hard starting.
    12.3V should be plenty to get a Rover V8 started, they need surprisingly little juice to turn over and fire, if they're in reasonable state. I've had cars start after sitting for a month or longer, with an old battery, but still coming to life after a few slow turns of the V8. The diesel is another matter, they do need the starter to spin at a good speed. And if it was the battery, the engine would still turn over, just slowly. Or at the very least there would be a click as battery voltage drops in the case of a bad battery. So unlikely to be the cause of the OP's problems. Because of the work recently done, a bad connections seems like the most obvious cause, but that seems to have been checked, so a new fusebox is not a bad next step. Even though I hate just replacing stuff wirthout being 100% sure it's the cause...

    Filip
    4.0 SE manual, 1997, 'Priscilla': current daily
    4.0 SE manual, 1995, 'Piper', built for offroad with tuned 4.6 on MS: lost in fire
    4.6 SE auto, 1995, 'Prue': awaiting attention
    2.5 DT manual, 1996, 'Paige': retired and stripped
    D90 TD5, 2005, 'Nessie' TR2 racer: sold

  14. #12
    JUNIOR ROVER
    Join Date
    April 24th, 2006
    Location
    Northern California
    Posts
    851

    Re: 1999 P38 4.6l wont crank after head gasket replacement

    Quote Originally Posted by Escape View Post
    12.3V should be plenty to get a Rover V8 started, they need surprisingly little juice to turn over and fire, if they're in reasonable state. I've had cars start after sitting for a month or longer, with an old battery, but still coming to life after a few slow turns of the V8. The diesel is another matter, they do need the starter to spin at a good speed. And if it was the battery, the engine would still turn over, just slowly. Or at the very least there would be a click as battery voltage drops in the case of a bad battery. So unlikely to be the cause of the OP's problems. Because of the work recently done, a bad connections seems like the most obvious cause, but that seems to have been checked, so a new fusebox is not a bad next step. Even though I hate just replacing stuff wirthout being 100% sure it's the cause...
    Never said he should blindly replace it. But it should be rated for the Range Rover in CCA along with being properly charged and 12.3V is not properly charged. But even if its closer to 13V, if its a small battery, its not going to supply enough energy to spin fast enough. The Gearbox fault is a classic indicator of not enough juice. I've never heard that the P38 was easy to spin, just the opposite.
    '99 Range Rover HSE
    '02 Audi S6

  15. #13
    FRESHMAN ROVER
    Join Date
    April 7th, 2019
    Posts
    6

    Re: 1999 P38 4.6l wont crank after head gasket replacement

    Thanks for the info guys, the battery in question is a new battery properly sized for the rover specs. i'll change the fusebox tonight and we shall see.

  16. #14
    Premium Member Escape's Avatar
    Join Date
    June 4th, 2007
    Location
    Belgium
    Posts
    1,172

    Re: 1999 P38 4.6l wont crank after head gasket replacement

    The Rover V8 can be started with a handle if need be, older Landies even had a hole for access for emergencies. Getting it to turn over is easy enough, even a battery half the size will do that without problem. Or a big battery that's dropped to below 12V. Lowest I saw was around 10.5V (after sitting for a couple of months), but she still came to life.
    The engine does need to be in good shape to fire on the first couple of turns. Only reason you want a big battery, is to have the necessary capacity to hold charge when leaving the Range for a length of time.

    I agree the gearbox fault points to an electrical problem, like a bad connection. Hope the fusebox solves it!

    Filip
    4.0 SE manual, 1997, 'Priscilla': current daily
    4.0 SE manual, 1995, 'Piper', built for offroad with tuned 4.6 on MS: lost in fire
    4.6 SE auto, 1995, 'Prue': awaiting attention
    2.5 DT manual, 1996, 'Paige': retired and stripped
    D90 TD5, 2005, 'Nessie' TR2 racer: sold

  17. #15
    FRESHMAN ROVER
    Join Date
    July 14th, 2016
    Location
    Cape Town, South Africa
    Posts
    216

    Re: 1999 P38 4.6l wont crank after head gasket replacement

    Quote Originally Posted by Escape View Post
    I agree the gearbox fault points to an electrical problem, like a bad connection. Hope the fusebox solves it!

    Filip
    My money is on a duff earth point or a loose connector.
    Cheers,
    John

    Rover P6B
    Land Rover Discovery 2 Td5 Manual
    Range Rover P38 HSE GEMS
    Moto Guzzi LeMans 850
    Aprilia Tuono V2

+ Reply to Thread
Page 1 of 2 1 2 LastLast

Quick Reply Quick Reply

Register Now

Similar Threads

  1. 99 range rover 4.6l hse won't crank over
    By Romero22 in forum Range Rover Mark II / P38
    Replies: 6
    Last Post: August 16th, 2015, 01:24 AM
  2. Head Decking w/ head gasket replacement
    By cynack in forum Range Rover Mark II / P38
    Replies: 5
    Last Post: August 1st, 2009, 08:22 AM

Tags for this Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBadvanced CMPS v4.3.0