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Re: Need help for my 3412C

oki  we are waiting< i hope every thing will be fine

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Re: Need help for my 3412C

Thanks eng_alaaelfa,
You might be correct.
Anyway, for this time , I try to put on operation first and monitor since ive got less time to open up and investigate where defective parts. Once Im done on it, i will post it here so can be guidelines to others.
Thanks also to patrick.

Re: Need help for my 3412C

Im with you , but if the exhaust manifold leaking smaal amount ,it will not affect the expansion tank.

i face the same problem towice befor in G 3412 gas engine.

 

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Re: Need help for my 3412C

Yes eng_alaaelfa,
I also think the same thing.
But, if it was leak from exhaust, it should can be indicate by stream bubble inside cooling water tank.
so far I just can see occasional bubble there.
Correct me if im wrong.

Re: Need help for my 3412C

is the exhaust manifold is water sheled?

if yes ,you have to inspect it

Contributor

Re: Need help for my 3412C

Changing new Lub oil cooler after found some oil contiminate in cooling water.

Flush the system almost 20 times, got some improvement. Now I keep running for 24 hours with load and will see the result tomorrow.
Contributor

Re: Need help for my 3412C

C.W temp during normal running 86°c - 89°c.
load 220KW with 1504 rpm.
No water spillage or shortage on cooling water tank.
Fully drained from the system and tube cooler. Refill with new fresh water. If still same, I will open up tube cooler 1st for inspection.
Will monitor and update to u.

Thanks patrick.
Trusted Contributor

Re: Need help for my 3412C

Removal of the cylinder head would be only neccarsary if there is excessive pressure build up in the system and overheating.

eg: the coolant is constantly spilling from the expansion tank.

 

if the system is completely filled and warmed up there is always a bit of water comming out due to the expansion of the water.

i dont know the condition of the external piping or heat exchanger but this one also needs to be drained.

otherwise you will have old cooling water remaining in the system, specially a tube cooler is a nice part where deposits settle.

Contributor

Re: Need help for my 3412C

Thanks patrick,
Will continue flush the system, will update u soon.
If still no different, means I need to take out cylinder head for inspection.

Trusted Contributor

Re: Need help for my 3412C

shortly after overhaul you can get black coloured or rust coloured water.

there is a lot of assembly grease in the system.

 

usually we run it on plain water first to see if we dont have any leaks.

then use a coolant system cleaner, drain everywhere you can.

exhaust manifold, side covers etc.

 

then fill with deminireralised water and nalcool 2000 or Cat SCA.

 

its always best to use demin water, because this doesnt create kettle stone on the liners and block.