Can a leaking injector cause low compression?

Hey there!
I have a 93 TD42 Patrol,
Long story short.. I drowned it 2-3 weeks ago, water got sucked in through the air box and the car shut off almost instantly. I got my mate to pull me out.
Waisting no time, We then pulled the glow plugs out and cranked it over. Drove 2 hours home as I had no other choice.
Now in the mornings the car runs rough and blows white smoke. But after about a minute of driving it drives fine, no knocking sounds on idle, no loss of power.
It does have a slight ticking noise under load. I noticed my #4 injector was leaking. Glow plugs are all working fine.
I also did a compression test the results are as follows;
Cyl 1: 430psi

Cyl 2: 410psi

Cyl 3: 420psi

Cyl 4: 240psi

Cyl 5: 410psi

Cyl 6: 380psi


My mechanic suggests I change my injectors, injector pump and glow plugs


My question is;
Could the leaking #4 injector be the cause of low compression in cylinder 4?

Thanks LEGENDS <3

Joey

You've swallowed a gut full of water, (remember that it's a 22.7:1 compression engine, a single teaspoon of water can ruin everything) lost compression on 1 cylinder and the first thing the mechanic wants to do is replace all the fuel system.



When you cranked it over did any water come out?

Unless there is some crucial info you've left out as to why an injector pump/injector replacement is going to restore compression given the current info , I think you need to find another mechanic.

It may have a bent rod if it hydro locked.

Depending on how quick it was swamped and how diligently quick it was truly ‘shut off’ could hopefully find #4 with its rings maybe released some water pressure?
Far from a mechanic me but every chance as the top blokes mention your conrods could be stressed too awaiting for next adventure fail to come?



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Have you thought about swaping the injector on CYL 4 with CYL 1, then do your compression test again.......... should rule out the injector without spending heaps of $$

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Originally Posted by 04OFF

Have you thought about swaping the injector on CYL 4 with CYL 1, then do your compression test again.......... should rule out the injector without spending heaps of $$

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I was just about to suggest the samething only for shits and giggles just to rule it out, but a leaking injecter will not effect compresion unless you have it half scewed out

"My mechanic suggests I change my injectors, injector pump and glow plugs"

I couldn't stop laughing when I read you swallow water so replace the injectors and pump ? So nothing to do with damaged internals, and a damaged conrod and maybe valve would produce white smoke of a morning of unburnt fuel until it warms up and ticking under load, it will need to be opened up and investaged or wait until it goes boom but most of the time it is cheaper to fix before you do more damage

Boil a billy, take that head off and start to have a good look around (safest option).

Bent Con Rod on #4 is my bet

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Originally Posted by the evil twin

Bent Con Rod on #4 is my bet

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I wrecken you are right.

Diesel engines being a 'compression detonation' motor, I would say you have caused damage resulting in the loss of compression. I'm sure a bent rod could reduce its stroke resulting in low comp.
Low compression will reduce your motors ability to detonate the fuel giving you symptoms of a fuel issue.

Thanks for the reply!
Yes water did come out when I cranked it over, my initial thought was bent conrod.
I posted here because I couldn’t believe what I was hearing when I spoke to my mechanic.
Definitely taking it somewhere else haha.
Thanks again

Thanks for the reply!
After I rule out some other possibilities, I’ll pull the head off and check.
But as most people have mentioned, it’s most likely a bent rod. :(

No luck with that unfortunately same outcome. Appears that the injector seal is gone.
Thanks for the reply.

To be honest, I was shocked when my mechanic said that hence why put this post up.
I’ll be taking it to another mechanic with a good reputation.
Fingers crossed it’s something not a bad as a bent rod, but not getting my hopes up.
Thanks for the reply.