 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Car Forum / Volvo Cars / October 2005740 spark plug replacement
It might be common knowledge but I thought I'd share anyway... I bought some new Bosch spark plugs for my 1989 2.3l 740 and three of the old plugs came out with hardly a problem, the fourth though, in number three cylinder, was tighter than a tight thing which had been tightened by Mr.Universe's big brother. I was able to undo it only about half a turn, then tighten it, then loosen it, then tighten it..... I sprayed penetrating oil on it several times but still only got it loosened about one whole turn in all before it locked solid again. Becoming more and more worried about stripping the thread I consulted the source of all knowledge - the internet - and found that running the engine for just a couple of minutes should expand the alumin(i)um head sufficently to give slightly more space for the plug to be unscrewed, and.....it worked!! There are few occasions in life when one is truly happy but this was one of them. I've taken many engines apart in the past so I knew what would have been involved if the plug thread had stripped. Si > It might be common knowledge but I thought I'd share anyway... > [quoted text clipped - 17 lines] > > Si Good job. I'd have probably stripped it or broke it off before thinking about checking on line. ('cause I know *lots* about motors and stuff... I think to myself.) Don't forget the anti-seize on the new plugs. A funny story: My neighbor bought a new model year Honda back in the '80's. He went to change the oil and couldn't get the filter off. He ended up shreading the canister all the way down to the flange so there was nothing left to grab and turn. He asked me to bring my welder over and weld something on the flange so he could turn it. After I welded a little bar on it, it spun off by hand... the heat from welding had softened the gasket. BTW... the filter he bought to replace it was the wrong one and it seems the correct filter was a new design and back ordered from Japan. He waited a week or two before he got the replacement. >> It might be common knowledge but I thought I'd share anyway... >> [quoted text clipped - 23 lines] >think to myself.) >Don't forget the anti-seize on the new plugs. It's another good reason not to use air tools to remove or replace spark plugs! __ __ Randy & \ \/ /alerie's \__/olvos '90 245 Estate - '93 965 Estate "Shelby" & "Kate" I have had many cars with aluminium head and never had success with bosch plugs .I use anti seize because of my experience with bosch .I prefer NGK plugs because of this very reason .As this is over many cars and millions of miles it pays .Motor craft were good till they stopped making them in Japan . >>> It might be common knowledge but I thought I'd share anyway... >>> [quoted text clipped - 39 lines] > '90 245 Estate - '93 965 Estate > "Shelby" & "Kate" ALWAYS use anti-seize when plugs go into an alloy head. Your plug problem may have been caused by either the Bosch plugs beign just a little longer than othre brands in th threads, or they might have run just a bit cooler (or both) causing excessive carbon build up making them difficult to get out....? I see commercials for "Denso" spark plugs. I am assuming that this is the renamed "Nippon Denso" company...? I used their ND-U plugs for years in my motorcycle and they ran great! I see the commercial for the Iridium plugs with teh U groove side electrode. Tempting, indeed! >I have had many cars with aluminium head and never had success with bosch >plugs .I use anti seize because of my experience with bosch .I prefer NGK [quoted text clipped - 45 lines] >> '90 245 Estate - '93 965 Estate >> "Shelby" & "Kate" __ __ Randy & \ \/ /alerie's \__/olvos '90 245 Estate - '93 965 Estate "Shelby" & "Kate" > ALWAYS use anti-seize when plugs go into an alloy head. > [quoted text clipped - 7 lines] > years in my motorcycle and they ran great! I see the commercial for > the Iridium plugs with teh U groove side electrode. Tempting, indeed! There's probably cases where this is wrong, but I've never had anything great to say about any of the fancy gimmicky spark plugs. I tried Bosch Platinum plugs a couple times, in one car the electrodes wore down surprisingly fast and another ran like absolute crap under boost and took forever to track down, now I always use plain old NGK plugs and have never had any problems at all with them. >> ALWAYS use anti-seize when plugs go into an alloy head. >> [quoted text clipped - 14 lines] >forever to track down, now I always use plain old NGK plugs and have never >had any problems at all with them. That may be the case. I know that the ND U groove made a big difference in the way the bike ran, and like you, I had very bad results in the same vehicle with the Bosch platinum. This was in a vehicle with points and standard kettering ignition (12 v system, single set of points, with two 6 v. coils). I think the New Denso has an exposed center electrode as opposed the the "hidden" electrode on the Bosch plugs. __ __ Randy & \ \/ /alerie's \__/olvos '90 245 Estate - '93 965 Estate "Shelby" & "Kate" > There's probably cases where this is wrong, but I've never had anything > great to say about any of the fancy gimmicky spark plugs. I tried Bosch > Platinum plugs a couple times, in one car the electrodes wore down > surprisingly fast and another ran like absolute crap under boost and took > forever to track down, now I always use plain old NGK plugs and have never > had any problems at all with them. That was my experience using Bosch platinums in the 765T. Within a year there were only holes where the center electrodes were and the engine was misfiring under load. Some say other brands don't do that but I'm happy with regular NGKs. Mike I lied ,the other day I saw Bosch plugs 4 four AU $37.50 at super cheap here in Melbourne .They had 4 earths and a small centre pointed in such a way that they should maintain their gap for a long time ,100.000 KLMS I was told .I used such plugs on an Alfa I once had they made a huge difference .so I will see .By the way number one plug was a fair cow to get in right so they havent changed their ways ,they still jamup in the treads . >I have had many cars with aluminium head and never had success with bosch >plugs .I use anti seize because of my experience with bosch .I prefer NGK [quoted text clipped - 46 lines] >> '90 245 Estate - '93 965 Estate >> "Shelby" & "Kate" Correction: 80 km/h - not 8 km/h of course > It might be common knowledge but I thought I'd share anyway... > [quoted text clipped - 17 lines] > > Si Another trick for the mental toolbox. Thanks! (And maybe more thanks down the road when I need to use this.) Mike |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.