Thanks Terry. One cylinder is definately burning oil I think, the deposits were way too black and greasy to be anything else, and I had to dig the gunge out of that gap. She is due for new oil shortly, I think I will try out that Mobil Synth S, I dont really have the cash for the fully synthetic oil, and cant justify it on a motor that isnt in top nick anyway, but the Synth S is meant to be pretty good for the money.
Saturday, August 10, 2002, 11:19:16 PM, you wrote: TR> Bob, TR> Unleaded fuels (LRP is also an unleaded fuel) leave a very different burn TR> colour on plugs than the old leaded super fuel, unleaded fuels typically TR> burn a much deeper greyish tinge and I've seen LRP burn with what you'd call TR> a rusty colour. I have real difficulty reading plugs these days as far as TR> mixture goes, and I've also found that different brand fuels burn different TR> colours probably due to the additives but oil burning is still recognisable TR> as the deposits fill up the gap in the plug around the electrode cavity. I'd TR> clean the plugs up and re-check them in 100k's or so and see if you can read TR> them any better. A very clean plug can suggest there is moisture getting TR> into the chamber but just one plug much darker than the others on a carbie TR> fed engine is a bit harder to identify the cause - possibly a worn valve TR> guide or seal or even a damaged piston ring. If there is anything major TR> wrong there will be other tell tale signs such as the exhaust colour, TR> coolant (bubbles, loss or colour), scum on the seal of the radiator cap, and TR> the underside of the oil filler and signs of blow-by through the rocker TR> breather etc. and even detecting any unusual odours when you stop the TR> vehicle after a bit of a run. L series engines were very well built for TR> their time but nothing like the tolerances of an engine built recently, and TR> little things you put in them 30 years on like the type of oil i.e. TR> viscosity etc can make a lot of difference to what they emit. TR> On the subject of oils - there was a discussion on this topic recently on TR> another list and at the end of the day we seem to stick anything that we TR> like in our 30 yo engines but that's another days discussion point for here. TR> regards TR> Terry TR> -----Original Message----- TR> From: [EMAIL PROTECTED] TR> [mailto:[EMAIL PROTECTED]]On Behalf Of Bob TR> Sent: Friday, 9 August 2002 4:19 PM TR> To: [EMAIL PROTECTED] TR> Subject: Spark plugs? Head? TR> Hello membersozdat, TR> I just had a look at my spark plugs on the z, and plugs 1,2,3,5,6 TR> all had rusty scaly crap on them, while plug 5 looked like it was TR> running way too rich, all very black. Im thinking that the rusty TR> colour cant be good, and I noticed I am loosing a bit of oil down TR> the block from the head gasket. What do you all recon? Cactus head TR> gasket? TR> -- TR> Best regards, TR> Bob mailto:[EMAIL PROTECTED] -- Best regards, Bob mailto:[EMAIL PROTECTED] --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
