4.0 Engine issues? - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old September 22nd, 2016, 06:48 AM
terryjm1's Avatar
terryjm1
Status: Offline
Terry
1988 Land Rover Santana & 98 D1 TDI
Member
 
Join Date: Aug 2015
Location: Mayhill, NM & St. Louis, MO
Posts: 98
4.0 Engine issues?

I am considering buying a D1 with a 4.0 that has 80,000 miles on the engine. They seem to have been well cared for maintained miles. Sorry, I know this is a Defender discussion section but I know many of you drive Defenders with 4.0 engines and many of you also have or have had a D1.

I have some experience with the 4.0 engine and it seems head gaskets are a common problem. It seems most of the higher mileage ones get the head gaskets done at about 100,000 miles. My question is this simply when they fail or is it caused mostly by issues like overheating?

Is it good preventive maintenance to R&r them at 100,000 to avoid damaging the rest of the engine when the coolant gets in the crankcase or perhaps could damage the catalytic converters and O2 sensors?

I am planning to drive it on a 2500 mile road trip with about 400 through high elevation mountain passes pulling a trailer. Is this too ambitious for an 80K truck. I will need to make this trip 10 to 15 times over the next few years. Am I asking to be stranded with an engine that has lost a head gasket?

Kind regards,

Terry
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old September 22nd, 2016, 07:02 AM
Capt Milks's Avatar
Capt Milks
Status: Offline
Mike
Defender V-8, Defender 2.25
Member
 
Join Date: Oct 2004
Location: United States
Posts: 1,794
Over heating is the killer. If the engine over heats you run the chance of slipping a liner and toasting the engine. Make sure the cooling system is up to the task. Do not rely on the gauge.
__________________
Land Rover 110
Reply With Quote
  #3  
Old September 22nd, 2016, 08:44 AM
Ray_G's Avatar
Ray_G
Status: Offline
Ray Gerber
96 D1 (Coyote), 06 D3
Member
 
Join Date: Dec 2007
Location: NoVA
Posts: 2,577
Registry
So now on my third D1 I'd say that the overheating alluded to, and to a certain degree specifically the HG, are problematic-but not nearly as much as they are with a Dii. Could you do the HG as a preventative? Sure, I guess. Would I-on an 80k mile truck? No. I'd change all the fluids, make sure the radiator was good to go, the coolant tank isn't part of the prone to crack generation and drive the truck.

That said, it is worth noting that depending on budget you may find an LR3 (aka D3) far more suitable for consistent, protracted, towing and with their prices these days depending on your budget worth considering.

Food for thought.
r-
Ray
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old September 22nd, 2016, 08:53 AM
1of40's Avatar
1of40
Status: Offline
1of40
NAS 97SW & 83 One Ten Tdi
Member
 
Join Date: Dec 2003
Location: Potomac Falls & Wintergreen, Virginia
Posts: 5,551
Registry
I have 150-160k-ish on 2 different 4.0GEMS. One NAS90 the other is my kid's 97D1. Neither have had their HG's done but I keep a close eye on temps and coolant levels. I now use an IR gun to check temps as well. I figure if the temps are safe and the coolant is steady you're good. Even good gaskets will blow if the cooling system is not constantly in check.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #5  
Old September 22nd, 2016, 08:57 AM
Uncle Douglas's Avatar
Uncle Douglas
Status: Offline
Doug Crowther
A defender in every driveway-motto
D-90 Source Vendor
 
Join Date: Dec 2007
Location: Gods Country- Central Virginia
Posts: 11,439
Registry
My brother has a 96 p38 with 300k on it. Head gaskets have never been done, radiator never been replaced, although he did come pilfer a new water pump off my shelf last month.
__________________
Good judgement comes from experience,experience comes from bad judgement.

Dividing Creek Imports
Worldwide Land Rover Shipment and Importation Service
Bespoke Restoration & Modification work


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

410.693.1391


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #6  
Old September 22nd, 2016, 09:09 AM
ezzzzzzz
Status: Offline
Mark Garrenton
'71 IIA 88 LS1 coiler, '84 110, +++
Member
 
Join Date: Jun 2004
Location: Portsmouth Virginia
Posts: 706
muthalickin pilferers...whatcha goin do?
__________________
Retirement is great, I haven't missed a day yet!
Reply With Quote
  #7  
Old September 22nd, 2016, 09:20 AM
Uncle Douglas's Avatar
Uncle Douglas
Status: Offline
Doug Crowther
A defender in every driveway-motto
D-90 Source Vendor
 
Join Date: Dec 2007
Location: Gods Country- Central Virginia
Posts: 11,439
Registry
Quote:
Originally Posted by ezzzzzzz View Post
muthalickin pilferers...whatcha goin do?
When I'm missing something, I know he's absconded with it. Such a punk
__________________
Good judgement comes from experience,experience comes from bad judgement.

Dividing Creek Imports
Worldwide Land Rover Shipment and Importation Service
Bespoke Restoration & Modification work


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

410.693.1391


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #8  
Old September 22nd, 2016, 11:34 AM
ranewman's Avatar
ranewman
Status: Offline
Rick Newman
85 Defender 110
Member
 
Join Date: Dec 2011
Location: Unionville, Va
Posts: 1,442
97 D1 with 300k.....never touched sans a radiator.....going strong....
__________________
Rick
06 L322 Range Rover "The Black Pearl"
06 L322 Range Rover "2.0"
97 Disco SD "Emma" (250k and going strong)
95 P38 "Gus" RIP
99 P38 Callaway Edition #106 RIP
85 Defender 110 2.5NA "Margret"
01 D2 SE7 "Cuzn It" (blown up POS)
03 D2 SE "Fred"
Hoarder of 2.5 NAD parts
"In God we trust. Everyone else keep their fucking hands where they can be seen."
Reply With Quote
  #9  
Old September 22nd, 2016, 04:05 PM
carlosz's Avatar
carlosz
Status: Offline
Carlos
frank stein "frankie" in action RIP
Member
 
Join Date: Jun 2006
Location: east coast
Posts: 920
Registry
the block will drop a liner before head gasket failure. normally the failed component is valley pan gasket.
the dealer started this fashion of failed head gaskets and due to internet, the cool kids decided to start recommending said repair when not needed.
quite often head gasket failure is misdiagnosed.

keep an eye on your cooling system and don't skimp on maintenance you will be fine.
__________________
the truck ran like a "raped ape"
A fussy warm weather creature...
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Tags
engine

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
New Owner / Engine Issues scolvus.x Defender Technical Discussions 4 November 27th, 2012 08:45 PM
Lashcap issues/valve cap issues trybul Defender Technical Discussions 6 January 9th, 2012 11:46 AM
Experiencing wierd electrical problems, engine power issues? madcowdungbeetle Defender Technical Discussions 0 May 26th, 2008 09:14 PM
Lifter / engine tapping... oil pressure issues.. revtor Defender Technical Discussions 10 July 12th, 2007 10:04 PM
Engine Temp issues sflash868 Defender Technical Discussions 11 May 25th, 2005 03:51 PM


All times are GMT -5. The time now is 02:25 AM.


Copyright