During our last outing we had an overheating problem with the 3.9L which developed into a blown head gasket(bare minimum).
I have removed and disasembled the engine, while cleaning the block I noticed the 6 marks on the tops of webs in the casting, they dont seem to go down the side of the webs at all.
I'm fairly sure this is not the first time this motor has been in bits

Any Ideas

Regards
David

Attached Images

Picture 004s.jpg (27.7 KB, 144 views)

The normal 'cracked block' failure mode of these (and all 94mm bore blocks) is cracking behind the liners, not the webs. Those marks dont appear to be cracks, but its hard to tell from the picture. If you have overheated the engine, have a close look at liners. If any have dropped below the block deck then it's most likely you have a crack behind the liner which releases it's grip on the liner and allows it to move.

I'll run with Taz .... I would expect cracks would be more "Hair line" rather than broad & shiny



Mike

They look more like scratches.

This is what a slipped liner looks like:

__________________
Ron B.

1995 P38A Range Rover 4.6 V8 Auto; 1968 LR Series IIA trayback (Holden 202)
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ex-1995 Discovery 300Tdi auto; ex-1984 110 County V8 3.5 manual; ex-1986 Range Rover HiLine 4.6 auto; ex-1983 Range Rover 3.5 manual

for a sec I just couldn't work this out and then I saw the engine was upside down.... like in a tiger moth... I hadn't realised they were that way in P38s...

....I don't know if that's a dead mosquito,... or something worse.... in the bore...

seriously, an instructive pic - thanks Ron

regards - Laurie

might be worth getting a dye penetration test done just for peace of mind...

you can buy the 4 spray can packs that comprise the test kit if you want to DIY for about $30 but most reputable machining shops should have a kit and may do the test for you for a small fee, it takes about an hour to do but is a case of spraying each can on in turn and waiting the prescribed time between the different sprays.

__________________
Dave

"In a Landrover the other vehicle is your crumple zone."

Big Red '03 D110 Extreme (TD5manual chipped)
Fozzy, 2.25D SIII Ex Telecom Highside Ute (bye Kermit)
T4 Diagnostics (sorta)

For spelling call Rogets, for mechanicing call me.

The engine was in a scrap metal bin (not mine) when I photographed it. It is a 3.9, not a P38A 4.0/4.6 - I'll invert the image. You may need to refresh the page to see the upright image.

__________________
Ron B.

1995 P38A Range Rover 4.6 V8 Auto; 1968 LR Series IIA trayback (Holden 202)
-------
ex-1995 Discovery 300Tdi auto; ex-1984 110 County V8 3.5 manual; ex-1986 Range Rover HiLine 4.6 auto; ex-1983 Range Rover 3.5 manual

thanks for all the info, the block will be off to an engineer on Monday.

Can anyone recommend (if thats allowed) a good workshop in the Nth Canberra area?

Ron,

How do you put the photo in the text?


while pulling the engine down I found that the Flex Plate was only just hanging on - see pic

Cheers
David

Attached Images

FlexPlate.jpg (68.3 KB, 235 views)

Like this:




When you are creating a message, see the image symbol on the second row (5th from the RHS)? Click on it and a dialogue box will open. Put the URL of the pic in there and click OK.

That was lucky, finding that broken flex plate. Two of mine broke around the centre.

__________________
Ron B.

1995 P38A Range Rover 4.6 V8 Auto; 1968 LR Series IIA trayback (Holden 202)
-------
ex-1995 Discovery 300Tdi auto; ex-1984 110 County V8 3.5 manual; ex-1986 Range Rover HiLine 4.6 auto; ex-1983 Range Rover 3.5 manual

Birko in Mitchell is as good as anywere to get engine machining and testing done. Know of a few people that have had stuff done there and are happy. I guess they could handle rover V8s.
Robert.