Date: Thu, 17 Aug 2006 02:35:42 +0100 From: "Charles C." <c.k.christacopoulos.removeme.nospamee.ac.uk> Subject: Re: Last Chance for My '85 900
CMM wrote: > On Mon, 14 Aug 2006 22:20:52 +0100, "Charles C." > <c.k.christacopoulos.removeme.nospamee.ac.uk> wrote: >> How have you tested? >> >> Removed all plugs, take out fuel fuse crank engine? >> >> If yes, please try once more ... and add a little engine oil through >> each plug hole (Don't know though what happens if you have a catalyst >> and oil goes down the exhaust pipe). >> >> The added oil should show you if you have worn out rings/cylinders. If >> compression goes up then they are worn ... > > The compression does come up slightly on three. I didn't test the > other ones since they weren't critically low. OK looking for cheap solutions. Take the rocker (head) cover off and check valve clearances. If it is the same head as I am thinking of ... there are metal shims which are used to adjust the gap (they can be ground down to the correct size etc)... If the gap is too small the valves would stay open too long, hence low compression. Alternative is to have the head off and look at the condition of the valve seats. When I had a cracked had ... I think the compression I got was less than the 90 you got but it is a long time ago to remember ... basically the car run on three cylinders. Look for other problems if you can ;-) > >> Hope I am wrong! Do you loose coolant? If yes, compare also the plug >> on No. 3 with the others. Heads of that era, (definitely on an 1982/83 >> car ... crack on cylinder No.3. The crack is not repairable. This >> would explain why the engine does not work once it has warmed up ... > > I lose only a tiny bit of coolant. There's no white "smoke" coming > out of the exhaust and no sign of water in the oil. > >> If it helps at all. > > Thanks, Charles. > > -- Christian -- Please remove _removeme_ to reply.
