You tell me, I haven't a clue any more.
Surely if there was any sort of crack or leak in the head, block or gasket
that vents from a cylinder to the cooling system then that would show up as
a low compression in the affected cylinders?? No? What am I missing here?
Pete
-----Original Message-----
From: [Email address removed] [mailto:[Email address removed]] On
Behalf Of Ray Dadd
Sent: 12 June 2007 14:37
To: [Email address removed]
Subject: RE: [ELCO] Engine rebuild brains
So peter it defiantly looking as if it is the head?
-----Original Message-----
From: [Email address removed] [mailto:[Email address removed]]
On Behalf Of Peter Browning
Sent: 12 June 2007 15:16
To: [Email address removed]
Subject: RE: [ELCO] Engine rebuild brains
According to Haynes (all I have) it should be 171 psi +/- 30 between pots??
Pete
-----Original Message-----
From: [Email address removed] [mailto:[Email address removed]]
On
Behalf Of Christopher Bell
Sent: 12 June 2007 13:42
To: [Email address removed]
Subject: RE: [ELCO] Engine rebuild brains
Pete
I don't have the figures for the petrol engine, but those for the
unturbocharged diesel 12h-t are 400 to 427 psi, and its compression ratio is
18.6 to 1. The compression ratio for the 1FZ-FE (I think that's you) is
supposedly 9.0 to 1, so on a not terribly scientific pro-rata basis you
should be looking for 193 to 207 psi.
The permitted variation between cylinders for the 12h-t is 28 psi, so
again scaling by a factor of 2 suggests 14 psi permitted for you.
On that basis your engine sounds a bit worn, but not unreasonably so, and
the variation between cylinders sounds OK too. I'd say "so far, so good",
since there isn't a cylinder that stands horribly out.
Sorry, not a lot of help. Good luck on the 19th
Christopher Bell
| I've arranged for a mechanical repair assessor to visit the shop with
me to
| watch the stripdown and then compile a report. This will be done 19th
June.
|
| In the meantime I've got them to run a compression test on the cruiser
-
| pots 1 through 4 are 185psi, 5 is 195psi and 6 is 190psi. Does that
give any
| further clues to anyone as to the state of the engine?
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