Register Login
Mr FIAT - Your #1 source for vintage car parts
Reply
 
Thread Tools
Old 1 Week Ago   #1
Join Date: Jun 2017
Posts: 56
Thanks: 5
Trader Rating: 0
Croatia 
Losing water with no visible leak

Hello guys,

as title says, my MK1 is losing water with no visible leak, but it's not overheating (checked with scan tool, when temperature goes above 90 celsius fan kicks in and keeping it at that level). Here are some things I did/checked:

- bleeded system several time
- checked every single part for leaks
- no bubbles in expansion tank
- no heating in cabin as of now
- no steam out of exhaust
- both hoses are warm
- when you turn off the car water coming out of expansion tank
- scan tool showing "System MAX Rich" (recently)
- car is running smoothly, no hesitation

Temperature gadget (not sure that's right word) in cabin showing that car is warmer than actually is. Before, fan would kick in just above middle line, now way above, although scan tool is showing that temperate is not that high as gadget says. I believe some air is tricking gadget and that same air could lead to "System MAX Rich" condition?

Thanks in advance,
Greetings from Croatia.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides


Last edited by VitaPepe; 1 Week Ago at 13:09.
VitaPepe is offline Reply With Quote Quote 
Old 1 Week Ago   #2
Moderator
 
Peter Pick-Up's Avatar
Join Date: Mar 2008
Posts: 4,301
Thanks: 192
Trader Rating: 0
Peter Pick-Up has donated!
Netherlands 
Re: Losing water with no visible leak

Have the cooling system presurized at a good workshop.
Thanks VitaPepe thanked for this post
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

Peter Pick-Up is offline Reply With Quote Quote 
Old 1 Week Ago   #3
Join Date: Jun 2017
Posts: 56
Thanks: 5
Trader Rating: 0
Croatia 
Re: Losing water with no visible leak

Quote Originally Posted by Peter Pick-Up View Post
Have the cooling system presurized at a good workshop.
I like to do things on my own, so I think I could make pressure tester from bicycle pump.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

VitaPepe is offline Reply With Quote Quote 
Old 1 Week Ago   #4
Moderator
 
Peter Pick-Up's Avatar
Join Date: Mar 2008
Posts: 4,301
Thanks: 192
Trader Rating: 0
Peter Pick-Up has donated!
Netherlands 
Re: Losing water with no visible leak

__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

Peter Pick-Up is offline Reply With Quote Quote 
Old 1 Week Ago   #5
Moderator
 
Peter Pick-Up's Avatar
Join Date: Mar 2008
Posts: 4,301
Thanks: 192
Trader Rating: 0
Peter Pick-Up has donated!
Netherlands 
Re: Losing water with no visible leak

Or this, together with your own air compressor:

https://www.ebay.com/itm/Car-Cooling...tYs5ET&vxp=mtr

__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides


Last edited by Peter Pick-Up; 1 Week Ago at 14:07.
Peter Pick-Up is offline Reply With Quote Quote 
Old 1 Week Ago   #6
Join Date: Jun 2017
Posts: 56
Thanks: 5
Trader Rating: 0
Croatia 
Re: Losing water with no visible leak

Quote Originally Posted by Peter Pick-Up View Post
You need a pump like this:

Yeah, just saw that one on ebay. Though, it's pretty expensive cause it comes in package for more car manufactures. Then I stumbled upon DIY bicycle pump tester which I would connect to that little hose on side of the expansion tank, I don't think it needs to be connected to expansion tank cap or i'm wrong!?

http://prntscr.com/h92bbd

Something like this.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides


Last edited by VitaPepe; 1 Week Ago at 14:24.
VitaPepe is offline Reply With Quote Quote 
Old 1 Week Ago   #7
Join Date: Jun 2017
Posts: 56
Thanks: 5
Trader Rating: 0
Croatia 
Re: Losing water with no visible leak

Yeah, we're thinking the same. Thank you for idea.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

VitaPepe is offline Reply With Quote Quote 
Old 1 Week Ago   #8
Moderator
 
Peter Pick-Up's Avatar
Join Date: Mar 2008
Posts: 4,301
Thanks: 192
Trader Rating: 0
Peter Pick-Up has donated!
Netherlands 
Re: Losing water with no visible leak

Don't put to much pressure on the system though, no more than ~2 bar I suggest.
It should keep pressure for at least 10 minutes or more.
If coolant seeps out visible, you know what to do.
If it looses presure with no visible leaks, I suspect headgasket...
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides


Last edited by Peter Pick-Up; 1 Week Ago at 15:10.
Peter Pick-Up is offline Reply With Quote Quote 
Old 1 Week Ago   #9
Join Date: Jun 2017
Posts: 56
Thanks: 5
Trader Rating: 0
Croatia 
Re: Losing water with no visible leak

Quote Originally Posted by Peter Pick-Up View Post
Don't put to much pressure on the system though, no more than ~2 bar I suggest.
It should keep pressure for at least 10 minutes or more.
If coolant seeps out visible, you know what to do.
If it looses presure with no visible leaks, I suspect headgasket...
Thank you for advises. Will test it tomorrow and reply with results.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

VitaPepe is offline Reply With Quote Quote 
Old 1 Week Ago   #10
Join Date: Mar 2007
Location: Limerick
Posts: 1,569
Thanks: 58
Trader Rating: 0
Ireland 
Re: Losing water with no visible leak

I would suspect head gasket.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

digger58 is offline Reply With Quote Quote 
Old 6 Days Ago   #11
Join Date: Jan 2013
Location: Norfolk UK
Posts: 13
Thanks: 0
Trader Rating: 0
United Kingdom 
Re: Losing water with no visible leak

I had a slight leak in my MK1 a few years ago, only sign was a slight mark down the side of the passenger side carpet where the heater matrix is.
I put some K seal in and it stopped the leak.
Now when I flush the cooling system I put a fresh bottle of K seal in " just in case" as it will seal any small leaks as they develop.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

Puntonaka is offline Reply With Quote Quote 
Old 6 Days Ago   #12
Join Date: Mar 2007
Location: Limerick
Posts: 1,569
Thanks: 58
Trader Rating: 0
Ireland 
Re: Losing water with no visible leak

I replaced my heater matrix in the cabrio, a real b..ch of a job but worth it, they are very cheap as well, Not a fan of any of the quick fix stuff.
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides


Last edited by digger58; 6 Days Ago at 21:03.
digger58 is offline Reply With Quote Quote 
Old 5 Days Ago   #13
Join Date: Sep 2014
Location: Las Negras, Almeria
Posts: 100
Thanks: 1
Trader Rating: 0
Spain 
Re: Losing water with no visible leak

Cylinder head gasket
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

rolandbrindley is offline Reply With Quote Quote 
Old 2 Days Ago   #14
Join Date: Jun 2017
Posts: 56
Thanks: 5
Trader Rating: 0
Croatia 
Re: Losing water with no visible leak

Okay. Went to mechanic, actually not mechanic, but parts changer. As soon as I told him I didn't do machine work on cylinder head, he said it's 100% head gasket. Although I was pretty sure it's not, since I checked it for straightness, I gave it a try. He did machine work on it and changed all of the gaskets, radiator cap, some plastics, added antifreeze etc. 150 total work, for... NOTHING!

Next day I saw green spot under the car, it was radiator that was bleeding heavily. Now i'm going to get a new radiator and replace it myself.
Question, will Punto 55 radiator fit on my Punto 75? I have cheap used one from friend of mine, almost new. But from what I saw on internet dimensions are different, just double checking.

Next time I'll listen ScannerDanner:
http://prntscr.com/hcs55d
__________________
FIAT Forum Useful Links:
Donate to FF | Buy FF Merchandise | Classifieds | FF Insurance | How-to Guides

VitaPepe is offline Reply With Quote Quote 
Reply
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump
Similar Threads
Thread Thread Starter Forum Replies Last Post
(T) Water leaking only under pressure, no visible leak (fotos) leootzen Punto (Mk2/2b) 5 19-09-2012 11:08
(G) losing water kilt101 Punto (Mk2/2b) 2 21-10-2009 19:21
(G) losing water from ? gazzatop Punto (Mk2/2b) 2 14-11-2007 12:59
(T) losing water bigpigeon2004 Cinquecento / Seicento 14 28-12-2005 22:54
(T) I'm losing water... baz_78 Cinquecento / Seicento 7 21-11-2005 14:29