This is why you don't take your Delica in deep water

Kellyn

Forum Administrator
Staff member
This thread is NOT to embarrass the customer. This is merely informative. We have all wanted to cross that deep mud hole or river. But here's the real world consequences. This Delica otherwise had very little drive line wear. The clutch became inoperative and would travel and stay to the floor. Initially I found a ruptured clutch hydraulic line to the slave cylinder. I replaced that and got the pedal back. In the first mile of the test drive I began to check the clutch holding capacity by resting my foot on the clutch pedal while accelerating. Immediately the clutch began to slip. We're talking a couple pounds of pressure on the pedal and it starting slipping. I knew right away we had clutch issues.

The following pictures are of the components after teardown. Note the caked mud in the bell housing. The housing had likely been completely flooded with water and mud and had severely contaminated the clutch. The throw out bearing and pilot bearing spin as if they are full of sand. Well, they are.
 

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Stupid question, but isn't this directly tied to shifting while in deep water? And not necessarily the deep water itself?

Though that's not to say these things were meant to be fording the Mississippi.
 
Not stupid at all. Regardless of shifting or not, water will make its way into that housing because it is not water tight. And shifting in water will only make it worse because it allows mud to go in-between the friction areas.

K
 
Good to know! This has reminded me I think I need to bleed my clutch lines/cylinders. Clutch pedal resistance varies depending on temp.
 
Glug glug!

Just curious: did the bellhousing have the lower sheet metal cover plate installed?
It's not even slightly watertight, but I've seen a bunch of engines with this cover missing and it always struck me as a great way to scoop muddy water/road spray directly onto the clutch.

s-l300.jpg
 
I also replaced the transmission support bushings which made a WORLD OF DIFFERENCE on that initial shudder that these vans have when you accelerate from a stop!

For this job I had to get creative with my shop press. Another forum member had posted the replacement bushings available on Amazon that I had ordered months ago for my own van but never Installed. It took a few tries to get my press setup in order to push those bastards out of the mounts but I got it eventually. If anyone has worn mounts but does not have the facility to replace the bushings, throw them in a box and send them to me! I'll replace them for you!

I test drove the van after replacing the clutch and the difference was huge. Very happy with the result and improvement with the new bushings. Drive on!

Cheers all,
K
 

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So... how deep is too deep?
OMG it's ruined. Best just to give it to me. ;-)

If you can keep an even speed through the water, pushing a "bow wave" ahead of the van, and not changing gear then I wouldn't worry about anything less than 2ft deep. Deeper than that and you're going to get water in places there shouldn't be water* and at 4ft. you're likely to start floating (very exciting, in a bad way.)

*Clutch, alternator, drivetrain breathers...
 
OMG it's ruined. Best just to give it to me. ;-)

If you can keep an even speed through the water, pushing a "bow wave" ahead of the van, and not changing gear then I wouldn't worry about anything less than 2ft deep. Deeper than that and you're going to get water in places there shouldn't be water* and at 4ft. you're likely to start floating (very exciting, in a bad way.)

*Clutch, alternator, drivetrain breathers...
Well said!
 
This might be another dumb question... bare with me.

Why have a snorkel if the drivetrain is not submersible?

Just wonderin...

-Sean
 
This might be another dumb question... bare with me.

Why have a snorkel if the drivetrain is not submersible?

Just wonderin...

-Sean

Snorkels pull in fresh air from a higher source that usually isn't contaminated with as much dirt. Also, it's out of the way from splashing water, etc. Usually, vehicles with snorkels will have other water-proofed mods in place; diff breathers, siliconed connections, critical components relocated. I didn't say that the drivetrain wasn't submersible. I've been in water so deep in came in the doors and it'll get you home, but there will be consequences.

K
 
Why have a snorkel if the drivetrain is not submersible?

Water in a diesel engine's intake can wreck the engine instantly and leave you stranded. Water in the drivetrain will require corrective maintenance (change fluids, wash out alternator, wash out or replace clutch: depending on how dirty the water was) but won't usually leave you immobile.
 
Water in a diesel engine's intake can wreck the engine instantly and leave you stranded. Water in the drivetrain will require corrective maintenance (change fluids, wash out alternator, wash out or replace clutch: depending on how dirty the water was) but won't usually leave you immobile.

There are stories of even experienced people over-estimated their skills (or vehicles performance) here in Australia, hydra locking their engine only to be found months later (dead).
 
So... how deep is too deep?
I believe the manual specifies something like 18-20" and a fording speed of something like 10kmph... there's also a pre/post fording procedure; basically grease everything before/after, and check for fluid contamination. I have a snorkel, raised diff breathers, and an automatic transmission... still, I don't push it if I don't have to.

But crossing a clear stream is rather different from wading through brackish/tidal water (sand/salt), and mud holes are probably the worst (very dirty and can also plug up radiators). I think of it as if I were going swimming... if I went in there, how quickly/badly would I need to shower and clean up? How quickly would I likely get sand/grit/dirt in places I'd rather it not be? Well, the same is true for the van...
 
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