Dont want to start a tecnical war on whether the manual is right or wrong, but i just need some good old fashioned 300zx.co.uk help!!

 

Ever since fitting a new rad ive developed all sorts of leaks, my guess is that now the system is up to full pressure its blowing all the weak hoses.

 

My water hoses at the very back of the engine leak a little when running then gush about half a litre of coolant out about one min after i shut the engine off when its hot.

 

I know the passenger side turbo coolant hose is leaking, which has been replaced but is still not a very easy job to tighten even with my small hands. So can i safely bypass these hoses from the top end behind the balance bar or will this make the tubs get too hot?

 

All help appreciated.

 

Disclamer; I will not and do not intend to sue/slag off/beat up anyone offering a solution to this!!!!

 

Cheers.

Dont want to start a tecnical war on whether the manual is right or wrong, but i just need some good old fashioned 300zx.co.uk help!!

 

Ever since fitting a new rad ive developed all sorts of leaks, my guess is that now the system is up to full pressure its blowing all the weak hoses.

 

My water hoses at the very back of the engine leak a little when running then gush about half a litre of coolant out about one min after i shut the engine off when its hot.

 

I know the passenger side turbo coolant hose is leaking, which has been replaced but is still not a very easy job to tighten even with my small hands. So can i safely bypass these hoses from the top end behind the balance bar or will this make the tubs get too hot?

 

All help appreciated.

 

Disclamer; I will not and do not intend to sue/slag off/beat up anyone offering a solution to this!!!!

 

Cheers.

 

I know that SE do a turbo water bypass in fact on a lot of the turbos they fit they remove the water cooling as its supposed to be ineffective on some of there turbo applications.

 

providing you cap of or remove the in and out of both turbos then yes, not sure I would want to run my turbos without water cooling though

 

tbh it would be easier to do a water bypass with the plen of then replace these hoses at the same time

 

Ryan

I'm just goimg to start this with the provisio that i'm no expert so my advice may be wrong :rolleyes: :D

 

in my number of engine malfunctions the advice seems to have been that the smaller stock turbo's can do without the water cooling. However Garrett strongly recommends connecting the water cooling on the larger Ball Bearing turbos because the oil flow through them is so much less.

 

Hope this helps.

 

Regards,

 

alex

Scrap that, i now believe i have a small leak on the tubby hoses which i think ive sorted, but i have one big massive leak on one of the pipes thats at the rear of the plenum by the bulkhead.

 

I dont know what it is but theres a kinda bell shaped thing behind the plenun and another metal joint by it all which carry water hoses i think, these things are painted red with coolant, and im guessing that water from the tubby hoses wouldnt manage to get there.

 

So ive spent a whole day fookin about and achieved crap all, i'll try again tommorow, by taking the balance bar off and going in that way, see what i can find in there!!!

 

Im about ready to burn the feckin thing, but with all the coolant all over it i doubt it would catch light!!!!

I'll come over on Monday and laff at you if you like!!! :D:D:D:D

Those hoses are a pain in the backside, and impossible to change without pulling the plenum - at least they were for me.. Perhaps with a set of really long handled long nose pliers and small hands, it might be possible..

 

Duffer posted a good pic in this thread;

http://www.300zx.co.uk/forums/showthread.php?t=38578&highlight=rear+engine+pic%2A

Thanks, that makes the job look even more daunting!!!!

I think I'm in the same boat here - mine did it on Thursday. Maybe its a time related hose rot thing and theres going to be a spate of it now!

Thanks, that makes the job look even more daunting!!!!

 

It's a fiddlyass job, that's for sure.. You might find it easier in the long run to pull the upper plenum off and renew all the hoses and/or bypass the TB & plenum pipework - there are a lot of short lengths of rubber hose underneath the plenum that you can't even see, let alone replace, that will most likely fail sooner rather than later..

 

Pulling the plenum ought to take you about a day the first time you do it, it gets easier once you've done it and bypassed the coolant lines though, as there's suddenly half the amount of stuff to connect back up :)

 

Well worth doing, IMHO.