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Post by peppib on Sept 28, 2014 14:35:57 GMT
Had Mo to pub today (meal and soft drinks only) round trip of 30 miles or so. First time out since Ryedale. On way home I was stopped at lights and noticed vapours and thought it was from the exhaust of 4x4 in front so ignored it. Drove back into town and stopped again at lights near home and the vapour was there again  This time nothing in front. Came the 400 yards home from there, stopped and the vapour was emanating from the front offside of the car, away from hoses, popped bonnet and it cleared. No way could I see the source and nowhere was hot. Wearing good clothes so felt it prudent not to oil up yet another shirt and pair of trousers so turned engine off, closed bonnet and retreated to flat.  I will report when (and if) I find the problem, but never had emissions from that side of the car before. Water temperature was recording normal.  |
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Post by Penguin45 on Sept 28, 2014 23:25:16 GMT
What sort of smell? Oily, petrolly, gassy, hot metal, that nasty stuck brake smell? Cooking anti-freeze is quite a distictive one.
Chris.
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Post by peppib on Sept 29, 2014 8:30:58 GMT
No smell at all Chris, which has me puzzled. Off shortly to investigate
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Post by peppib on Sept 29, 2014 9:13:34 GMT
Easy. Rocker cover gasket has failed at that end and oil dripping on to the exhaust.
Do I have a spare? Of course I do
Can I find it? Can I 'eck as like
Too lazy today to nip to the MGB place on the other side of the river, so have just ordered a couple online
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Post by peppib on Nov 2, 2014 15:03:49 GMT
Thought I had fixed this, but sadly not.
Running the car whilst stationary I can't get the smoke, however in motion it starts after about 4 miles. The smoke is pale blue and virtually odourless and is most intense around the clutch housing. I have noticed the clutch is a bit 'light' needing only a feather touch to disengage. A complete new clutch was fitted when I changed the gearbox 4 or 5 years ago (Chris - please note I forgot to change the thrust bearing at the time and had to take the engine out again - I did have a new bearing but just forgot to fit it) and the car has done 10,000 miles since. Is it possible there could be an oil leak onto the clutch causing the problem??
Whilst I was a member of the local restoration club there was a guy (seems there always is) who was a retired fitter, allegedly BMC trained who looked at every job being undertaken by anyone so that he could throw in his two penneth. He reckons that with Landcrabs he was able to change the clutch without taking the engine out by removing battery tray, engine steady mounting, undo nearside mountings and jack the engine up slightly from the nearside. This allowed just enough movement to access the clutch. Anyone heard of this or is it just effluent from the rear end of a male bovine?
Dave
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Post by Penguin45 on Nov 2, 2014 16:28:40 GMT
'Tis true, PeppiB. I've never tried it, mind you.
Chris.
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Post by peppib on Nov 2, 2014 16:41:53 GMT
Thanks Chris. Will consider options (not able to take engine out myself now so have to trust lads at nearby garage, but I might be able to manage to remove mounting bolts and jack the thing up)
Dave
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Post by tommydp on Nov 2, 2014 22:16:06 GMT
My uncles claim they changed 1800 clutches in the way described, back in the old days. They both worked at the BMC dealer in our town. I suppose it could be possible.
Is oil dripping out from the hole on the under side of the flywheel cover, after a good run? This could point to a leaking crankshaft or clutch shaft oil seal. Use a torch and try to look into the flywheel after removing the grommet at the clutch fork. Any oil there?
As you mention the clutch release point, are you sure the hydraulics aren't sticking etc, making the thrust bearing pressing slightly all the time, crating heat and smoke? There should be some slack at the slave pushrod, when clutch is not operating. I would check out all possibilities before pulling it out, if the clutch is working. Check out recent post on clutch hydraulics. If there is an oil leak, bad enough to create smoke, you would perhaps expect the clutch to slip?
Well, who knows.. Just a few thoughts. Keep us updated.
Good luck!
Tommy
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Post by dave1800 on Nov 3, 2014 0:13:26 GMT
Hi Dave
Yes it definitely can be done in situ, there was even an article about it in one of the poular mechanics magazines so I tried it once. I didn't find it much of an advantage as I usually liked to attend to other things when the enfine was out conventionally on the bench.
As Tommy has indicated check the clutch hydraulics to make sure they are not holding pressure. Are you getting any clutch slip? If it is oil leaking from the rear engine oil seal it will drip out of the small hole at the bottom of the housing.
Good luck
David
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Post by peppib on Nov 3, 2014 14:17:26 GMT
Thanks guys. Have been down and checked ..... and yes the push rod from the slave cylinder has stuck out. Worked it a bit and could feel it snagging on something and there is a small fluid leak. I will remove the cylinder (I have a full repair kit for it) ASAP and report back. Can't do it this afternoon as madam is asleep and if she wakes and I am not here, without telling her, then she will freak. I will try and do the job tomorrow. Biggest difficulty is bleeding as she is unable to comprehend the idea of pushing a pedal to the floor and holding it there until I tell her to release it. Will see when a friend can come over to help.
No oil drip (well, not from the bottom of the housing anyway)
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Post by peppib on Nov 4, 2014 13:55:36 GMT
Did the job this morning and am now licking my wounds (back and legs really painful) but at least Mo is roadworthy again
Odd thing though. The repair kit I had, the end rubber cover was minute, not the right size at all, so I had to re use the old one
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Post by Penguin45 on Nov 4, 2014 17:59:42 GMT
Well done. Fiddly job.
Chris.
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Post by peppib on Nov 16, 2014 15:29:05 GMT
Oh s......ugar. Had her to pub at lunchtime. Thought all was well until 7 miles when ... smoke
Think I will put a new slave cylinder and pushrod on (have spare somewhere, if I can find them. I have space in a communal storage area and stuff is piled, in boxes, in a heap with very little room to move around)
Watch this space
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Post by dave1800 on Nov 19, 2014 1:12:30 GMT
Before you change the cylinder are you sure it is the cause of the sticking if indeed that is the problem? A quick and easy test would be to see if it closes further when you loosen the bleed screw. If it does the cause if the m/s or maybe the flexible pipe. Regards David Oh s......ugar. Had her to pub at lunchtime. Thought all was well until 7 miles when ... smoke Think I will put a new slave cylinder and pushrod on (have spare somewhere, if I can find them. I have space in a communal storage area and stuff is piled, in boxes, in a heap with very little room to move around) Watch this space |
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This time nothing in front. Came the 400 yards home from there, stopped and the vapour was emanating from the front offside of the car, away from hoses, popped bonnet and it cleared. No way could I see the source and nowhere was hot. Wearing good clothes so felt it prudent not to oil up yet another shirt and pair of trousers so turned engine off, closed bonnet and retreated to flat. 
