Re: 81 504 TD: EXCESS air in coolant system & high pressure HELP!

From: Senen Racki (senen@cgocable.net)
Date: Fri 14 Apr 2000 - 20:03:21 UTC

  • Next message: Jerry Bauer: "Re: Re: Peugeot [1975 504 gas] Diagnostic suggestions"

    It's probably the head gasket. That is a very common problem on the XD2
    engines, especially the turbo ones. If you don't have any smoke then the
    gasket is just beginning to let go. It will get worse, especially with the
    hot weather coming. I'd treat it as soon as possible. Plan ahead and order
    the gasket asap so that you have everything you need to do the work (it may
    take some time to get a gasket, and plan on at least $140CDN for it alone).
    Although the official procedure is to replace the head bolts when changing
    the gasket, you should be ok. Peugeot designed the bolts to stretch when
    torqued, so when you remove the bolts just double-check that the stretching
    isn't excessive. I put new ones on the last time I changed the head gasket
    on your car. Hopefully you won't have to incur the cost of yet another set.

    Senen.

    -----
    From: "Ivo Nezic-Degrel" <nezic_ivo@softhome.net>
    To: "PUG List" <peugeot-l@egroups.com>
    Sent: Friday, April 14, 2000 3:39 PM
    Subject: 81 504 TD: EXCESS air in coolant system & high pressure
    HELP!

    > Last week I noticed that my 81 504 TD (2.3L) was letting off steam like
    crazy from the expansion tank cap. I figured it was because the weather had
    gotten warmer and maybe the water pump was going... Right after turning on
    the engine I probed around and noticed it wasn't hot, yet air was escaping
    from the expansion tank cap and the hoses were under a lot of pressure. I
    checked all hoses for obstructions, blew the radiator out and found no
    obstructions, even checked out the water pump and re-tightened the belt, yet
    the problem is still there! The engine runs and sound perfect, no coughing
    or shaking, no misfires, no smoke. I just can't figure out where this air is
    coming from!
    >
    > The only thing I can think of it that there's a tiny crack in the block or
    head, and the gas from a cylinder is entering the cooling system, or maybe
    the head gasket is leaking, with the same effect as above...
    >
    > I even re-torqued the head for good measure...
    >
    > I am considering treating the engine with some Engine Weld, or other such
    product and if it is a crack I'll see if it helps...
    >
    >
    > [Non-text portions of this message have been removed]
    >
    >
    >
    >
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