[MR2] MK1 Cooling System

Thu Sep 10 16:33:34 EDT 2009

The one that was on the car and had worked for several years was a Stant. When this problem happened I replaced it with an OEM that had been on another car. The other car had been working fine. The OEM cap hadn't been used for some time so it might have also developed a problem. 

This afternoon I will perform a cold pressure test on the cooling system just to make sure that a leak doesn't develop when the system is cold or cooling down. My pressure tester installs in place of he radiator cap so if the test passes then the most likely cause of the problem will be the cap. 

Dennis

--- On Thu, 9/10/09, Jerry Helman <gerald_helman at comcast.net> wrote:

From: Jerry Helman <gerald_helman at comcast.net>
Subject: RE: MK1 Cooling System
To: mr2 at mr2.com
Cc: mr2garage at yahoo.com
Date: Thursday, September 10, 2009, 10:44 AM

Dennis; I agree w/rechecking the pressure cap. Some aftermkt. ones may not
have the proper sealing gaskets for a coolant recovery system, and would
cause that type of symptom. Was the replaced cap new? OEM? Good luck.
Jerry Helman/Senor Dos/85 MK1

-----Original Message-----
From: mr2-bounces at mr2.com [mailto:mr2-bounces at mr2.com] On Behalf Of
mr2-request at mr2.com
Sent: Thursday, September 10, 2009 9:00 AM
To: mr2 at mr2.com
Subject: MR2 Digest, Vol 29, Issue 10

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Today's Topics:

   1. Re: a/c vs alt. belt (Aaron Willis)
   2. MKII Parts needed (Donny E)
   3. carfax request (mr2driver at carolina.rr.com)
   4. MK1 Cooling System Problem (Dennis McFayden)
   5. Re: MK1 Cooling System Problem (Bob Schultz)

----------------------------------------------------------------------

Message: 1
Date: Wed, 9 Sep 2009 10:54:25 -0700
From: "Aaron Willis" <AWillis at lithia.com>
Subject: Re: [MR2] a/c vs alt. belt
To: "tbamc" <tbamc at gbta.net>,    "MR2" <mr2 at mr2.com>
Message-ID:
    <15245494673DF44FB71F20D37D4323D00801A15B at ntmarge.lithiainc.com>
Content-Type: text/plain;    charset="us-ascii"

In order, from shortest to longest:

90916-02341-83 is alternator belt w/ manual steering
99364-70830-83 is alternator belt w/ power steering
90916-02365-78 is air conditioner belt

Aaron Willis, Parts Dept. - Lithia Toyota Scion of Springfield, OR
541.736.3221 (direct) - 800.888.6305 (toll free) - 541.747.4174 (fax)
Official vendor: www.mr2oc.com and www.mr2.com

-----Original Message-----
From: mr2-bounces at mr2.com [mailto:mr2-bounces at mr2.com] On Behalf Of
tbamc
Sent: Tuesday, September 08, 2009 11:20 AM
To: MR2
Subject: [MR2] a/c vs alt. belt

Anyone happen to know which is the shorter--or longer--belt, on a 91T?  
Or the part # of either?

Thanks.

Thon

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Message: 2
Date: Wed, 9 Sep 2009 19:57:17 -0400
From: "Donny E" <DonnyE at tampabay.rr.com>
Subject: [MR2] MKII Parts needed
To: "Donny E" <DonnyE at tampabay.rr.com>
Message-ID:

<!&!AAAAAAAAAAAYAAAAAAAAAJFwhamsNPhKuwePUrkI5IfCgAAAEAAAAIYgZKOoYCxHvU7GezdG
lbIBAAAAAA==@tampabay.rr.com>

Content-Type: text/plain;    charset="us-ascii"

Looking for:

.         Driver side window/lock/mirror switch (black)

.         Antenna motor

Anyone parting out a MR2 or know of a good site to go to for used parts?

------------------------------

Message: 3
Date: Thu, 10 Sep 2009 09:04:48 -0400
From: "mr2driver at carolina.rr.com" <mr2driver at carolina.rr.com>
Subject: [MR2] carfax request
To: mr2 at mr2.com
Message-ID: <380-22009941013448279 at M2W033.mail2web.com>
Content-Type: text/plain; charset=iso-8859-1

If anyone out there could check a VIN for me, please contact me directly.
THANKS!

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Message: 4
Date: Thu, 10 Sep 2009 08:32:54 -0700 (PDT)
From: Dennis McFayden <mr2garage at yahoo.com>
Subject: [MR2] MK1 Cooling System Problem
To: MR2 Email <mr2 at mr2.com>
Message-ID: <331848.15948.qm at web62301.mail.re1.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1

This problem just started. First I am not loosing any coolant nor is my
engine over heating. The problem is that the cooling system does not suck
the coolant back into the system when it cools down. 
?
I have changed the radiator cap. I have also?checked to make sure that the
tube going between the overflow tank and the system is not plugged. I can
pull coolant from the over flow tank with a vacuum. Things seem to be very
normal except for this problem. When the system?has cooled down I can remove
the radiator cap and don't see coolant. I can manually recover the?coolant
from the over flow?tank into the system and see that the total amount
remains the same. 
?
Anybody?have an experience like this?
?
Dennis
?
This MR2 is an '87 NA. ?

------------------------------

Message: 5
Date: Thu, 10 Sep 2009 11:43:52 -0400
From: "Bob Schultz" <bob-schultz at comcast.net>
Subject: Re: [MR2] MK1 Cooling System Problem
To: "'Dennis McFayden'" <mr2garage at yahoo.com>,    "'MR2 Email'"
    <mr2 at mr2.com>
Message-ID: <008e01ca322d$7f9579a0$7ec06ce0$@net>
Content-Type: text/plain;    charset="iso-8859-1"

Your Radiator cap could still be the problem... I have had a bunch of
defective even brand name caps.
If it isn't the cap, check out the sealing area on the filler neck,  a chip
there (and I have seen it) will prevent the cap from sealing.

If that doesn't seem to be a problem, then you have a leak in the system
somewhere... it may be a small one but it is preventing the system from
going into a vacuum when it cools down. 

Get a cooling system pressure tester. You might be able to borrow one from
AutoZone, they do have a tool loan program. If not try the other big
boxes...  This is about the only way to find a leak and it is possible that
you have a small leak and it is enough to prevent a seal but not enough to
really leave a puddle.

Bob

-----Original Message-----
From: mr2-bounces at mr2.com [mailto:mr2-bounces at mr2.com] On Behalf Of Dennis
McFayden
Sent: Thursday, September 10, 2009 11:33 AM
To: MR2 Email
Subject: [MR2] MK1 Cooling System Problem

This problem just started. First I am not loosing any coolant nor is my
engine over heating. The problem is that the cooling system does not suck
the coolant back into the system when it cools down. 
?
I have changed the radiator cap. I have also?checked to make sure that the
tube going between the overflow tank and the system is not plugged. I can
pull coolant from the over flow tank with a vacuum. Things seem to be very
normal except for this problem. When the system?has cooled down I can remove
the radiator cap and don't see coolant. I can manually recover the?coolant
from the over flow?tank into the system and see that the total amount
remains the same. 
?
Anybody?have an experience like this?
?
Dennis
?
This MR2 is an '87 NA. ?

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