Coolant System Diagram?

Stu.Wilson · March 11, 2006, 10:23:39 PM

Hi all, could anyone point me in the right direction. I need to locate a coolant system diagram.

Some of you might of seen an earlier thread of mine, this is all to do with that. I\'am trying to figure out why my system will not hold the 0.9 required.

Any help will be much appreciated.

Thank Stu

nikp · March 11, 2006, 11:49:59 PM

When you fill it back up, do you fill all the way to the top of the filler cap, or do you fill up till it just covers the coolant level sensor? I ask, only that if you fill up to the brim, the coolant system will dump the excess, but what it actually does, is dump more than the excess. So by the time you start the car again, you have got less coolant than last time. I kept doing this, until i was informed to just fill up to a little bit over the level sensor, and no more.

HTH

Stu.Wilson · March 12, 2006, 12:05:21 AM

Quote from: nikpWhen you fill it back up, do you fill all the way to the top of the filler cap, or do you fill up till it just covers the coolant level sensor? I ask, only that if you fill up to the brim, the coolant system will dump the excess, but what it actually does, is dump more than the excess. So by the time you start the car again, you have got less coolant than last time. I kept doing this, until i was informed to just fill up to a little bit over the level sensor, and no more.

HTH

I used to fall into that trap myself until Clive made me aware of it, but thats not whats causing the problem now. This coolant system is the vain of my life at mo! I\'ve got a real horrible feeling that a apex seal may have gone, even though engine only rebuilt Aug \'03.

Basicaly what is happening is - fill system up to required levels, pressure test system (which should stay at 0.9), it then drops to 0.8. So thought prehaps AST gone again, although was replaced in Aug last year. When pressure tested earlier tonight the pressure dropped right down to 0.5 and could hear the pressure leaking from the coolant system. The sound was coming from around the turbo area and small leak too.

So have been trying to locate a diagram for the coolant system online tonight, which is proving little harder than i thought it would be.

Stu

Clarky · March 12, 2006, 12:28:46 AM

Hope this may help

Stu.Wilson · March 12, 2006, 12:39:11 AM

Brilliant diagrams, thanks hopefully they should show all the pipe work. just hope it\'s a bit warmer tomorrow weather wise. Will post and let ya all know how i got on.

Also in my search how found few usefull sites, will post in new thread.

Cheers Stu

nikp · March 12, 2006, 01:40:49 PM

Thats not quite the complete diagram. There\'s a coolant feed from the back of the water pump housing to the throttle body assembly, and there\'s also a feed to the turbo\'s too. If you can evidence of an an external coolant leak, that\'s good, cos that means it\'s probably not an engine water seal, so hopefully no rebuild required.

Oh, and when the coolant system lets go, it\'s not the apex seals that go, it\'s the water seals around the rotor housings.

Stu.Wilson · March 12, 2006, 03:30:08 PM

Quote from: nikpOh, and when the coolant system lets go, it\'s not the apex seals that go, it\'s the water seals around the rotor housings.

I stand corrected, haha. i\'ve isolated the leak to the rear of the turbos. Just can\'t see the exact location of it, as that area is packed with stuff.

If any1 has a diagram of the coolant system for the turbos that would be great, or if they could talk me through it. Thanks again to Hamc for the diagram.

Cheers Stu

kev-yorks · March 12, 2006, 04:12:32 PM

Quote from: Stu.WilsonI stand corrected, haha. i\'ve isolated the leak to the rear of the turbos. Just can\'t see the exact location of it, as that area is packed with stuff.

If any1 has a diagram of the coolant system for the turbos that would be great, or if they could talk me through it. Thanks again to Hamc for the diagram.

Cheers Stu

Not sure if its the same as the 20b turbo pack but i would imagine it is. Theres a metal pipe runs behind the turbo\'s with a branch so it supplies both turbo\'s it joins the turbo pack via a banjo fitting you probably need to tighten these and/or replace the copper washers that give the seal.
Kevin

Stu.Wilson · March 12, 2006, 04:31:50 PM

Quote from: kev-yorksNot sure if its the same as the 20b turbo pack but i would imagine it is. Theres a metal pipe runs behind the turbo\'s with a branch so it supplies both turbo\'s it joins the turbo pack via a banjo fitting you probably need to tighten these and/or replace the copper washers that give the seal.
Kevin

That\'s the pipe i need to do, the metal rail one. It looks a b#*ch of a job to get to though, i guess i have to remove the Y pipe thing from the turbos to get to it. That\'s the diagram i need though.

Cheers Stu

MillSpeed · March 12, 2006, 07:45:36 PM

Found this pic of the twin turbo pack which you might find usefull......

http://photobucket.com/albums/c321/MillSpeed/?action=view¤t=dd_32.jpg

kev-yorks · March 12, 2006, 07:51:12 PM

There the ones don\'t know if you\'ll be able to get them in situ they are a pig of a job to get to in a Cosmo so i can only imagine what sort of job it is in a FD. May be quicker to lift out the engine.
Kevin

Stu.Wilson · March 12, 2006, 10:52:57 PM

This job looks like it\'s gunna be fun! haha, was going to tackle today, but put off due to bad weather. looks like i\'m doing public transport 2mo morning!

Unfortunatley do not have the equipment to remove engine, so looks i\'m going to be removing parts of the car to get to it. With bit of luck can try to access it from underneath.

Once again thanks for everyones help and will give progress report, i\'m just hoping this solves the coolant pressure loss problem. If not then will be back to square one.

One last question, can i use coolant piping from any car part shop or does it have to be a special brand?

Cheers Stu

kev-yorks · March 13, 2006, 03:19:32 AM

If its the rubber hose then use any you can get. The steel pipe has brazed joints and copper washers for the seals. Good luck with doing it in situ.
Kevin

Martiny · March 13, 2006, 07:21:45 AM

Stu, get the proper Mazda hose.

Do you want to do the job again in a few months?

They can be done without removing the engine. I cant remember fully, but I "THINK" I had to remove the Y pipe.

rmagictastic · March 13, 2006, 09:09:11 AM

ay up stu,

send me a pm of your number and i will ring you and have a chat.

you can do it in situ.

i took all of that area apart yesterday on someones car mate.

needless to say wear you \'PATIENT\' boots... tis a knuck biting Beeehatch of a job.

nick