Post 45490 by Col44 on 2005-09-24 19:50:15
Checked plugs today ,they are marked volvo R6 489 they have very pointy tips ,are these platinum ones?? they were very clean no traces of carbon etc, almost white in colour, never seen a plug in this condition, maybe never seen a platinum one !
Anyway the one on no. 5 cylinder was solid....should i just leave it i thought ,the car seems to be fine as is :B_steerin
No ...the challange got the better of me ,ordinary plug hand socket thingy was useless ,so out came the socket set , :wtf: this isni movin ,heart rate increasing at this point....widen the stance ,roll the sleeves up give it some :nutkick: crunch...heart rate ballistic now ,quick flash of my empty bank balance goes through my mind, muster the composure to peer into the hole...the feckin thing has come to bits .Some of the ceramic stuff had to be picked out with with long tweezer things then try again with socket,finally it gave after getting extra leverage on the socket.
What my question is after that ramble ...do you think the plugs fitted (not by me but only 8k miles ago got the receipt) were the wrong grade or is my car running lean or are these pointy tipped jobs supposed to be like that.Going to get a new set tomorrow but not volvo ones , dont know what to go for ,reading other posts on plugs everyone has a different opinion .
Colin
Post 45501 by Rufe on 2005-09-24 21:16:34
pointy ones? what do you mean by that mate? the sparking end is pointy?
on yours, if they were genuine volvo ones (and they were marked volvo you say) then they sound wrong, they should have been part number 8692071 do check your invoice.
i would say no volvo dealer could make a mistake with these for your car, as there are only really 2 types of plugs for the entire 850/S70/V70 classic/V70 new shape models.. turbo or non turbo. simple as that
Post 45511 by Col44 on 2005-09-24 22:00:59
Yep, thats the part no. on the invoice. The no. i quoted was the one stamped on the actual plug.
Being pointy ,yes i do mean at the sparking end ,sorry :slap:
Post 47844 by LeeT5 on 2005-10-06 21:26:41
[QUOTE=Col44]Yep, thats the part no. on the invoice. The no. i quoted was the one stamped on the actual plug.
Being pointy ,yes i do mean at the sparking end ,sorry :slap:[/QUOTE]
Pointy ones are indeed platinum tipped could also be iridium!!
As for the colour..they are meant to be white :) Thats means the engine is running sweet.
When replacing plugs always put a dab of copper slip on the threads and ALWAYS tighten to the correct torque.
Post 47878 by Al115 on 2005-10-06 23:36:37
Aren't spark plugs meant to be torqued dry (without copperslip) - like wheel bolts?
Post 47894 by LeeT5 on 2005-10-07 00:05:08
[QUOTE=Al115]Aren't spark plugs meant to be torqued dry (without copperslip) - like wheel bolts?[/QUOTE]
:slap: You dont have to drown them in copper slip, just a tiny bit on the bottom of the thread is ok and will elliminate plugs seizing in the alloy head.
Or...dont bother!!! I dont care, just trying to help. Mine are always copper slipped and never had a problem.
Went out to an Audi a6 v6 that had this problem. Had just been serviced and where the dealer had torqued the plugs DRY they rattled themselves loose a nd thus a really bad misfire occured.
So if you lubricate the threads lightly then they wont work loose, remembering that plugs are not torqued very much at all.
As for wheel bolts, use a penetrating oil NOT copper slip.
Post 47937 by Al115 on 2005-10-07 09:37:50
Sorry, it was a genuine question - I had always assumed that copperslip distorted the torque measurement when tightening the plugs.
Cheers for clarifying.
Post 47946 by LeeT5 on 2005-10-07 09:53:01
[QUOTE=Al115]Sorry, it was a genuine question - I had always assumed that copperslip distorted the torque measurement when tightening the plugs.
Cheers for clarifying.[/QUOTE]
On the contrary, not using copperslip will mean that some plugs will be tightened more than others due to threads being dirty, corroded or just dry!
By using copper slip you are eliminating the above and therefore ensuring all 5 plugs are tightened with equal torque and all the same depth in the head.
This also eliminates seized plugs 20,000 miles later!!
We dont want stripped threads now do we?