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Thread: Leaky POSIV........

  1. 07-04-2010, 09:15 PM #1
    POS Racing
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    Default Leaky POSIV........ (How to use a Coolant Pressure Tester)

    At the last SCCA Event Onething told me he smelt coolant but I didn't so we ran the event with few issues.

    Today I changed the plugs on the car and took it for a spirited test drive. When I got home the aroma of coolant was noticeable. Looked around didn't see anything other than a quarter sized drip of coolant on the garage floor........

    Figured I better figure this problem out quick before I blew a hose at speed and baked a motor.

    So off to Autozone to rent a Coolant Pressure Tester w/Adapters.

    Let the car sit to cool off and then I tested the system. Here is what I found......
    Last edited by POS Racing; 07-10-2010 at 01:59 PM.
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  2. 07-04-2010, 09:21 PM #2
    POS Racing
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    Read the instructions that come with the tester yadda yadda yadda......

    First you need to open the hood and locate the Radiator!

    Then open the cap (Remember I let the car sit a few hours so everything is cool)

    Install the adapter that comes with the pressure gauge.

    Next install the pressure unit and gauge!

    Presure up the system with the air pump.
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  3. 07-04-2010, 09:22 PM #3
    POS Racing
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    Uh oh the gauge is dropping so the system has a leak....


    Looked around and saw I had coolant on the back side of the motor....


    Little more searching and look what I found...... See the stream of coolant....


    It is the damn little hose from the oil cooler to the back of the motor well at least I know the source of the leak.
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  4. 07-04-2010, 10:28 PM #4
    gabkwong
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    Do you have to pull the engine for that?
    Gabriel
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  5. 07-05-2010, 05:19 AM #5
    jrj512
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    I'd blame Onethng and make him fix it.
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  6. 07-05-2010, 06:20 AM #6
    onething
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    He won't let me in his garage while he's working on anything.
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  7. 07-05-2010, 08:13 AM #7
    POS Racing
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    Quote Originally Posted by gabkwong View Post
    Do you have to pull the engine for that?
    No but it looks like it is going to be a PITA to replace....
    Quote Originally Posted by jrj512 View Post
    I'd blame Onethng and make him fix it.
    Good point! I'm getting it towed to his house today!
    Quote Originally Posted by onething View Post
    He won't let me in his garage while he's working on anything.
    Have you found the hose yet?
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  8. 07-05-2010, 10:06 AM #8
    POS Racing
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    Well seems as if this is a "special order part" I was hoping to find one today....





    Note to self p/n BPE8-15-536
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  9. 07-05-2010, 05:47 PM #9
    Mark52
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    A common problem on cheater engines.
    What's left of a '96 Miata with stock clutch.
    My car exceeds my driving ability. That's the only possible explanation.
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  10. 07-05-2010, 05:50 PM #10
    POS Racing
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    Quote Originally Posted by Mark52 View Post
    A common problem on cheater engines.
    I haven't pulled the paperwork but isn't my cheater motor still under warranty??
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  11. 07-05-2010, 08:24 PM #11
    trickyrix
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    Quote Originally Posted by POS Racing View Post
    It looks like it is going to be a PITA to replace...
    Just yank the intake manifold for E-Z access!
    '94 Black & Black & Tan
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    8/13/11 (more stuff...): 126 hp/116 lb-ft - Mustang dyno

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  12. 07-05-2010, 09:53 PM #12
    creek
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    I got a complete set from Rosenthal and changed them all at the same time.......except those two which are still in the plastic. I wonder why that is?
    Stripe Das Sape

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  13. 07-06-2010, 08:52 AM #13
    POS Racing
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    Quote Originally Posted by creek View Post
    I got a complete set from Rosenthal and changed them all at the same time.......except those two which are still in the plastic. I wonder why that is?
    Because they are not leaking???

    I replaced evey hose on the motor except for the one that is now leaking. Some how it never showed up when I was ordering all my bits and pieces. Didn't figure it would be a problem...
    Last edited by POS Racing; 07-06-2010 at 09:03 AM.
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  14. 07-06-2010, 09:07 AM #14
    trickyrix
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    Quote Originally Posted by POS Racing View Post
    I replaced evey hose on the motor except for the one that is now leaking. Some how it never showed up when I was ordering all my bits and pieces. Didn't figure it would be a problem...
    ...and the whooooole motor was out of the car?

    '94 Black & Black & Tan
    '99 head swap, JR header, TDR intake & header blanket, MegaSquirt, RB hollow bar, Tein Flex, 15x8 6ULs, HD M2 Sport, FM cat, Borla cat-back, black '95M interior, MOMO Zebrano, IL Motorsport console...

    Dyno Days
    8/16/08 (bone stock): 103.1 hp/99.0 lb-ft - Dynojet
    8/23/08 (Borla cat-back): 108.2 hp/104.1 lb-ft - Dynojet
    8/13/11 (more stuff...): 126 hp/116 lb-ft - Mustang dyno

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  15. 07-06-2010, 09:14 AM #15
    POS Racing
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    Quote Originally Posted by trickyrix View Post
    ...and the whooooole motor was out of the car?
    I know, I know !
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  16. 07-06-2010, 09:44 AM #16
    jrj512
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    Quote Originally Posted by POS Racing View Post
    I know, I know !
    You must feel pretty stupid right now.
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  17. 07-06-2010, 10:02 AM #17
    POS Racing
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    Quote Originally Posted by jrj512 View Post
    You must feel pretty stupid right now.
    A little....

    It did run for more than 10,000 miles and has been over a year since I installed the "cheater motor®" before this hose let go....
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  18. 07-06-2010, 01:13 PM #18
    trickyrix
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    Quote Originally Posted by POS Racing View Post
    A little....

    It did run for more than 10,000 miles and has been over a year since I installed the "cheater motor®" before this hose let go....
    Well, you got good life out of it, so it was totally worth it! Mine was a snap to replace!

    4_Cleaning the de.jpg
    '94 Black & Black & Tan
    '99 head swap, JR header, TDR intake & header blanket, MegaSquirt, RB hollow bar, Tein Flex, 15x8 6ULs, HD M2 Sport, FM cat, Borla cat-back, black '95M interior, MOMO Zebrano, IL Motorsport console...

    Dyno Days
    8/16/08 (bone stock): 103.1 hp/99.0 lb-ft - Dynojet
    8/23/08 (Borla cat-back): 108.2 hp/104.1 lb-ft - Dynojet
    8/13/11 (more stuff...): 126 hp/116 lb-ft - Mustang dyno

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  19. 07-08-2010, 10:30 AM #19
    POS Racing
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    Look what UPS dropped off.....
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  20. 07-08-2010, 01:16 PM #20
    apex2apex
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    I have that hose laying in the garage, too difficult to replaced when I did the rest of the hoses. Lets hope it stays good for a good while longer......
    94 Miata R package RPF1 195 RS-R RB FSB FCM Bilstein Ebay Coilover 550/350
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