wkdtime Posted June 28, 2005 Share Posted June 28, 2005 if my stem seals are quite bad i.e alot of start up smoke pretty much every morning and not just for a few seconds but more like 10-15 seconds, can this cause alot of oil burn up (topped up 2-3 litres of oil since my last change 4000 miles ago)? if stem seals are shot would it only burn oil on startup? thanx guys! Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 28, 2005 Share Posted June 28, 2005 Worn guides and seals will often cause vast oil burning. On start up its VERY visible beacuse the cam carrier valleys have drained a load of oil into the heads combustion chambers overnight. oil still gets used to excess in normal driving, but it's not as visual. It probably needs guides doing as well as seals. Quote Link to comment Share on other sites More sharing options...
JohnA Posted June 28, 2005 Share Posted June 28, 2005 Chris, have you seen supras with worn guides? OK the seals go south at the 100K mark, but do the *guides* wear out as well? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 28, 2005 Share Posted June 28, 2005 Seen and done several heads with worn guides, particularly exhaust guides, yes. Quote Link to comment Share on other sites More sharing options...
JohnA Posted June 28, 2005 Share Posted June 28, 2005 Thanks Chris. So when I get the head out, I guess I should be prepared to change the guides too... Quote Link to comment Share on other sites More sharing options...
michael Posted June 28, 2005 Share Posted June 28, 2005 Chris, is this one a job that can be done by you in a day or does it take longer? Quote Link to comment Share on other sites More sharing options...
JohnA Posted June 28, 2005 Share Posted June 28, 2005 get the stock twins out, intake out, head out, work on head, then put everything back and drive home? bit of a tall order.... In these temps, it takes half a day for the engine even to cool down. Quote Link to comment Share on other sites More sharing options...
michael Posted June 28, 2005 Share Posted June 28, 2005 Yeah but this is Chris we are talking about Quote Link to comment Share on other sites More sharing options...
Digsy Posted June 28, 2005 Share Posted June 28, 2005 He's good but I bet he's not that good Quote Link to comment Share on other sites More sharing options...
Ian C Posted June 28, 2005 Share Posted June 28, 2005 He doesn't even do magnetic pistons -Ian Quote Link to comment Share on other sites More sharing options...
Aerotop Dave Posted June 28, 2005 Share Posted June 28, 2005 Keeping an eye on this thread as mine has a noticeable oil burning smell about it since my decat and the smoke has got worse. I don't think it's a problem with the decat, just that all the smoke now comes out more easily. I even noticed it today when I blipped the throttle at some traffic lights. How much are we looking at for this job anyhow? Quote Link to comment Share on other sites More sharing options...
wkdtime Posted June 28, 2005 Author Share Posted June 28, 2005 i have someone doing my stems, is it big detour for him to do the guides aswell? as in labour wise? and also how much are the guides form mr T? cheers Quote Link to comment Share on other sites More sharing options...
JohnA Posted June 28, 2005 Share Posted June 28, 2005 Magnetic pistons would be cool, as at TDC they'd pull the valves open quicker, lol... Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 28, 2005 Share Posted June 28, 2005 In a DAY???!!! You're kidding, right! It's best to sleeve or knurl the existing guides otherwise the valve seats may need a LOT of cutting and valve recession will probably occur. It's a big job, by the time everything is re shimmed and all the seats re cut et cetera. probably at least a grands worth all in. Quote Link to comment Share on other sites More sharing options...
Aerotop Dave Posted June 28, 2005 Share Posted June 28, 2005 Quote Link to comment Share on other sites More sharing options...
BigRoy Posted June 28, 2005 Share Posted June 28, 2005 I think 1K all in is good considering the amount of work and time involved. Mine needs doing, its not too bad but hoping it holds together until the autumn. Quote Link to comment Share on other sites More sharing options...
michael Posted June 28, 2005 Share Posted June 28, 2005 In a DAY???!!! You're kidding, right! It's best to sleeve or knurl the existing guides otherwise the valve seats may need a LOT of cutting and valve recession will probably occur. It's a big job, by the time everything is re shimmed and all the seats re cut et cetera. probably at least a grands worth all in. Pah! The cost doesn't concern me (too much) but having my car off the road for a long period of time while I bum lifts backwards and forwards does, that's why I asked really. I knew it was about £1k as we've had this thread before but I also know how much hourly rates and Toyota parts can be so wondered if that was for a day I guess I'll have to keep this little treat on hold until I can either find someone really local to do it or buy a banger to use while the Supra is in being pampered. Quote Link to comment Share on other sites More sharing options...
BigRoy Posted June 28, 2005 Share Posted June 28, 2005 I have the same problem Michael. I think I will just buy a very cheap old banger. Quote Link to comment Share on other sites More sharing options...
jagman Posted June 28, 2005 Share Posted June 28, 2005 I have a spare head at my place,if there was enough interest I could refurb ,or also port and polish,and replace the heads as an exchange item,this would reduce the downtime of your car as the head would be ready to fit and done to your spec. Quote Link to comment Share on other sites More sharing options...
michael Posted June 28, 2005 Share Posted June 28, 2005 I like that idea... the cogs are spinning.... Quote Link to comment Share on other sites More sharing options...
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