Mike,
You would definitely be right if this were an xc, xm, or xn engine,
but it's a 405, and I have never heard of a cracked 405 head.
In my experience with USModel Peugeots, I have found that all of the
iron block engines (with the possible exception of the 304, with
which I have too little experience) crack heads routinely at high
(and some not-so-high) mileages, while none of the aluminum block
engines do (xu9-. zdjl, zm-zn-).
Has anyone found to the contrary? How about with non-USModel Peugeots?
Brian Holm
Parts for Peugeots
At 03:01 AM 12/2/2007, p404c wrote:
>--- In peugeot-L@yahoogroups.com, "peugfan@..." wrote:
>I could pull only the two plugs on either end; the two middle plugs
>wouldn't budge. I soaked them with PB Blaster which didn't do much
>good, although maybe after a few months....? Could this be related?
>Engine feels like it's "running on three cylinders".
>
>Uh oh. I will predict that the head is severely cracked, with two
>of the cracks running down the centre cylinder spark plug threads.
>
>This happened to me with one of the 404 KF2 Injections some years
>ago (1988) when I froze the coolant on a long descent, creating an
>airlock and overheat when I was climbing a hill right afterwards. I
>cooked the engine even though it ran that way for only about one
>minute.
>
>About a year later, the #4 plug was so tight that I broke two spark
>plug tools getting it out. The engine seemed to be running fine
>actually. A post-mortem a year later when I scrapped the car
>revealed a nice dislocation-type crack right up the plug hole
>threading. I still have that head (not sure why - souvenir?).
>Years after that I bought a brand new head which I still keep in its
>Peugeot box, as insurance against a similar misfortune with my 404 C.
>
>Regards
Brian Holm, Parts for Peugeots
at Peugeot Holm, since 1969
2120 Maple Hill
Plainfield, VT, 05667
802-454-7132, fax -1310
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Received on Sun Dec 2 15:17:55 2007
