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ultimatehandyman
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Joined: 16 Jul 2005
Posts: 9740
Location: Darwen, Lancashire
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 Posted: Wed Dec 26, 2007 12:53 pm Post subject: |
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I watched wheeler dealers yesterday and the mechanic (think he is called Eddie) changed a timing belt on a 205 GTI, but he never pinned any of the sprockets to stop them moving, he just alligned the sprockets to marks on the engine and then took the old one off and fitted the new one.
He made it look like an idiot could do it, but the instructions were a little lacking. Once he had removed the old belt, he just kind of said "then fit the new timing belt" and never showed you how to tension it or anything 
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Hitch
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Joined: 16 Jan 2006
Posts: 2531
Location: Somerset
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| Posted: Thu Dec 27, 2007 8:40 am Post subject: |
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I dont think its quite so critcial on a petrol engine. Dont have much to do with petrol myself 
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stevemastic
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Joined: 16 Jan 2006
Posts: 1181
Location: Cuckoo's nest
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| Posted: Thu Dec 27, 2007 9:43 am Post subject: |
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you oniy need 1 tooth out to run like a bag of sh*te on petrol thats if it will start at all
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Hitch
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Joined: 16 Jan 2006
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Location: Somerset
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| Posted: Thu Dec 27, 2007 9:46 am Post subject: |
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Said i didnt know much about petrol
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Hitch
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Joined: 16 Jan 2006
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Location: Somerset
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| Posted: Thu Dec 27, 2007 10:09 am Post subject: |
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I suppose its obvious when you think about it. 
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owen
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Joined: 31 Jul 2006
Posts: 475
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| Posted: Thu Dec 27, 2007 10:17 am Post subject: |
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| i've only done a couple, but the actual job is fairly straighforward as others have said, providing you lock everything in position. the main problem with a lot of engines is access, you end up having to take a lot of stuff out of the way to get to it. |
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jason123
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Joined: 16 Dec 2006
Posts: 1239
Location: Stellaville
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| Posted: Thu Dec 27, 2007 5:26 pm Post subject: |
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If you want to turn the engine over by hand, its a difficult task on a petrol engine, I think impossible on a diesel, which the glow plugs out 
Oh and of course, you do know what the engine is going to do when you approach TDC by hand with the plugs in.
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Tryanything
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Joined: 18 Aug 2007
Posts: 1531
Location: Essex
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| Posted: Fri Dec 28, 2007 12:01 am Post subject: |
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| jason123 wrote: |
Oh and of course, you do know what the engine is going to do when you approach TDC by hand with the plugs in. |
Give me a clue
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jason123
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Joined: 16 Dec 2006
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Location: Stellaville
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| Posted: Fri Dec 28, 2007 12:37 am Post subject: |
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With modern engine management systems it probably wouldnt happen, but of old, you crank the engine over by hand, diesel is drawn into the cylinders and you crank over, deisel ignites on compression, if you were strong enough to approach TDC with fuel in the cylinders it will ignite and you will go to casualty
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iceni
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Joined: 01 Aug 2007
Posts: 71
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| Posted: Fri Dec 28, 2007 3:20 pm Post subject: |
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I've changed the belts on my current Escort a couple of times and changed the previous one a couple of times also.
Get a Haynes manual as previously suggested, always useful even if you know what you are doing.
You need a couple of drill bits tp lock the drive gears for one type or a drill bit and a flat steel plate about 4mm thick (fits in free end of camshaft) for other type. You also need a special pin to locate the crankshaft.
This pin fits through the alternator bracket, difficult to see (you need a small mirror) so the alternator needs to come off. No need to remove the steering pump, you can release the feed pipe and pull it far enough away to get access.
Its normally recomended to buy a kit that includes a new pulleys/tensioner. having gone to the trouble of getting all this lot apart you may as well fit one. |
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owen
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| Posted: Fri Dec 28, 2007 3:50 pm Post subject: |
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yep good point about the tensioners, i had a fiat coupe that died about a year ago when the tensioner went, belt slipped and engine was knackered.
someone had actually gone to the trouble of changing the belt about 6 months previous to me buying it, but had scrimped on the tensioner pulley to save a few quid  |
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uncle buck
Senior Member
Joined: 28 Feb 2007
Posts: 106
Location: Newcastle T&W
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| Posted: Mon Dec 31, 2007 12:03 am Post subject: |
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| jason123 wrote: |
| With modern engine management systems it probably wouldnt happen, but of old, you crank the engine over by hand, diesel is drawn into the cylinders and you crank over, deisel ignites on compression, if you were strong enough to approach TDC with fuel in the cylinders it will ignite and you will go to casualty |
You would have to be turning the engine over very fast for that to happen.
Diesel is ignited by the heat caused from the compression of the air in the cylinder. |
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simpleplumb
Senior Member
Joined: 04 Jan 2008
Posts: 149
Location: ESSEX
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| Posted: Mon Jan 07, 2008 10:18 pm Post subject: cam belt |
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| dont do it the hire van is warmer and has good sleeping position |
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Rich-Ando
Approved Electrician
Joined: 24 Mar 2007
Posts: 2618
Location: Derby, Derbyshire
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| Posted: Tue Jan 15, 2008 1:40 pm Post subject: |
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i have always changed the tensioners and water pump at the same time.
if you just change the cambelt you end up putting a new belt on and leaving an old part on. the new belt will be stronger than the one you took off and therefore producing more torque on the OLD tensioner. you are gambling and as mentioned above, for the same reasons it isn't worth it.
having cost myself a lot of money over the years because i lose my temper when doing mechanics, i now pay out for it to be done. i recently had the belt and bits changed on my escort van. all included came to £130. the van has never driven so well !!!!
saying that, i have also had a belt snap on an old petrol Ford Orion years ago and i was lucky enough to have nothing go wrong with the engine. Yet 4 years ago, a belt snapped on a 306D turbo and it destroyed the engine.
i get them changed regularly now. |
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Hitch
Senior Member
Joined: 16 Jan 2006
Posts: 2531
Location: Somerset
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| Posted: Tue Jan 15, 2008 9:39 pm Post subject: |
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I used to be like that Rich.... II had to do a clutch cable... big bar in the top of gearbox.... pull cable, bar slipped out, had my hand... so i threw it and dented the bonnet, then kicked hell into the front bumper
Luckily, it was only a fiesta
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