Hydro-****ed - what happens when you drive through the Spey in spate

payydg · Monday at 22:26

Haven’t posted for ages as me and the landy were getting on swimmingly… until I took it actually swimming by trying to cross the Spey in spate and now I’ve drowned the engine. Excellent work by me.

Engine rebuild time. Which is fine as I was just thinking I had too much time and money on my hands. Not.

Obviously I’ll strip it and survey the damage but so I can start planning and budgeting what normally fails when an engine (200tdi defender) gets hydro locked?

Graculus · Monday at 22:39

The driver.

payydg · Monday at 22:57

Yeh, but the landy’s there to be worked hard and taken on adventures and sometimes I get it wrong. Luckily I get it wrong enough to keep the tool collection growing.

Hicap phill · Tuesday at 04:13

You may be lucky & just bent a few push rods.and hopefully it’s a cheap fix

lynall · Tuesday at 07:12

Check con rods straight when you have them out.

Snorkel worth the effort.

200 tough old lumps, I heat seized mine one winter in the snow off roading as forgot to turn fan on, decade later still running.
Another 200 the engine oil for some reason turned to syrup and had no oil pressure for the first mile or two, this went on for ages before I could be bothered to see what was wrong, still running with new oil.

freelance · Tuesday at 10:08

Bent con rods are probably favourite

payydg · Tuesday at 10:15

Hicap phill said:
You may be lucky & just bent a few push rods.and hopefully it’s a cheap fix

That would be the dream!

payydg · Tuesday at 10:24

lynall said:
Check con rods straight when you have them out.

Snorkel worth the effort.

200 tough old lumps, I heat seized mine one winter in the snow off roading as forgot to turn fan on, decade later still running.
Another 200 the engine oil for some reason turned to syrup and had no oil pressure for the first mile or two, this went on for ages before I could be bothered to see what was wrong, still running with new oil.

They are hard as a coffin nail. Good shout, I guessed I’d need a new set of con rods and pistons at the very least.

I was hoping to avoid a new crank…

With a streak of sheer genius I took the snorkel off a couple of years ago.

lynall · Tuesday at 16:02

payydg said:
They are hard as a coffin nail. Good shout, I guessed I’d need a new set of con rods and pistons at the very least.

I was hoping to avoid a new crank…

With a streak of sheer genius I took the snorkel off a couple of years ago.

Bet you get away with pushrods and maybe valve gear as @Hicap phill phill suggets above.

bluedog333 · Tuesday at 16:45

lynall said:
Bet you get away with pushrods and maybe valve gear as @Hicap phill phill suggets above.

Indeed, I can’t see the con-rods going before the valves (non-interference) and push-rods. Pistons should be alright too.

payydg · Tuesday at 17:08

lynall said:
Bet you get away with pushrods and maybe valve gear as @Hicap phill phill suggets above.

bluedog333 said:
Indeed, I can’t see the con-rods going before the valves (non-interference) and push-rods. Pistons should be alright too.

I’d be happy if it was just a head rebuild. Although why would the valves and push rods suffer if there was water in the piston on the compression stroke wouldn’t this be against closed valves?

marjon · Tuesday at 17:08

Silly question/statement time.
A valve can not be bent if it’s closed, an engine can only hydro look if valves are closed?

J

marjon · Tuesday at 17:09

You got there at the same time as me

J

Hicap phill · Tuesday at 17:16

payydg said:
I’d be happy if it was just a head rebuild. Although why would the valves and push rods suffer if there was water in the piston on the compression stroke wouldn’t this be against closed valves?

Water will be in the engine & do the damage before the exhaust valves open. Softest metal is the push rods.
Check rods for bends
Then take head off & check the piston movement

payydg · Tuesday at 17:33

Hicap phill said:
Water will be in the engine & do the damage before the exhaust valves open. Softest metal is the push rods.
Check rods for bends
Then take head off & check the piston movement

That makes sense. Thanks pal. Is there a way to measure the piston heights to check without having to take the bottom end apart?

payydg · Tuesday at 17:34

marjon said:
Silly question/statement time.
A valve can not be bent if it’s closed, an engine can only hydro look if valves are closed?

J

dag019 · Tuesday at 17:55

payydg said:
They are hard as a coffin nail. Good shout, I guessed I’d need a new set of con rods and pistons at the very least.

I was hoping to avoid a new crank…

With a streak of sheer genius I took the snorkel off a couple of years ago.

If you do end up needing con rods, pistons and or a crank I have all of these (crank has been re-ground) used from an engine that was broken for spares. Plan was to rebuild it but head was cracked and fuel pump was siezed. So I have boxes of spare used parts if you don’t fancy going down the new route.
But I would agree with the above. a Top end rebuild and maybe a piston or two should be all you need.

Hicap phill · Tuesday at 18:22

payydg said:
That makes sense. Thanks pal. Is there a way to measure the piston heights to check without having to take the bottom end apart?

Once you have the head off rotate the engine and measure each piston height.
Look for score marks at the same time this should show any bends in con rods(

bluedog333 · Tuesday at 18:41

payydg said:
I’d be happy if it was just a head rebuild. Although why would the valves and push rods suffer if there was water in the piston on the compression stroke wouldn’t this be against closed valves?

The push rod + valve is weaker than the con rod, in a non-interference engine they will give up first.

lynall · Tuesday at 18:59

marjon said:
Silly question/statement time.
A valve can not be bent if it’s closed, an engine can only hydro look if valves are closed?

J

If only engines rotated at a snails pace then you might be correct.

Hydro-****ed - what happens when you drive through the Spey in spate

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