mattpilmoor
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| posted on 7/2/05 at 10:04 PM |
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Cavalier Cam Belt Snapped!
Does anyone know what the chances of my valves been shafted are?
On my way home from work (first day back after my holiday) stuck in a traffic jam my 1.6 F-Reg (Classic) Cavalier stalled. I couldn't get it
going again so i called the AA. One knackered Cam belt!
It looks as though the fuel pump gasket has been leaking oil on to the belt and it's perished it.
Does anyone know if the valves clear the pistons on the 1.6?
I'm fitting a new one tomorrow but fear the worst.
Any constructive advice appreciated. It's off to the scrappers otherwise.
Cheers
Matt
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stephen_gusterson
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| posted on 7/2/05 at 10:12 PM |
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my mother has a later M reg 1.6 astra - dunno if its same engine. when her belt snapped it took 1200 quid of work to fix it.
hope yours is better news!
atb
steve
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Ben_Copeland
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| posted on 7/2/05 at 10:13 PM |
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Its an 8v i assume... most 8v vauxhalls are fine if the cambelt goes...
Just retime it with new belt and turn it over slowly by hand. Then take spark plugs out and turn on key... then try starting it.
If at anytime you hear dodgy noises STOP !!!
Ben
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Ben_Copeland
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| posted on 7/2/05 at 10:15 PM |
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Stephen... think your mother should of had the 16v engine i think
Ben
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Stu16v
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| posted on 7/2/05 at 10:16 PM |
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quote:
Does anyone know if the valves clear the pistons on the 1.6?
Sadly not. However *sometimes*, rather than bending valves, the engine breaks the rockers instead. A tool can be purchased (or made) to compress the
valves, so the 'bits' can be removed, and new rockers installed.
Get the rocker cover off, all will be revealed...
Dont just build it.....make it!
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omega 24 v6
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| posted on 7/2/05 at 10:27 PM |
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Ive done an 8 valve before with no damage to the valves.However it had snapped the belt when the engine was turned off (at the kickback of a pressure
stroke) the owner did try to start it until the batt went flat and it was still ok.
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Ben_Copeland
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| posted on 7/2/05 at 10:28 PM |
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I've had and known of cambelts go on 8v's with no damage. So fingers crossed for you
Ben
Locost Map on Google Maps
Z20LET Astra Turbo, into a Haynes
Roadster
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http://www.facebook.com/EquinoxProducts for all your bodywork needs!
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mattpilmoor
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| posted on 7/2/05 at 10:46 PM |
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cheers - i'll keep you posted tomorrow
Matt
Measure twice - Cut once - Still f*!K it up!
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Lightning
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| posted on 7/2/05 at 11:09 PM |
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I had an 8 valve in a cavalier years ago, belt snapped and was told it was a safe engine. No damage at all.
G reg BTW
Steve
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niceperson709
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| posted on 8/2/05 at 02:45 AM |
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Hi Matt
I would recomend that after fitting the cam belt that you turn the engine over BY HAND WITH A SPANNER I had a Di hatsu Hi Jet UTE and had to havea new
cam belt fitted and being the cautious type I took it to my local mecanic to set the timing up properly well to cut a very long (and traumatic  )
story short the bright spark mech (with laots of formal qualifacations ect ect ) put it to gether and instead to turning it over by hand he used the
key:- result was 6 bent valves and no transport for us over one Christmass So even if your engine is undamaged by the belt breakage it may he harmed
by the belt timing being wrong so take care and be cautious .
Best Wishes
Iain
Best wishes IAIN
life is not the rehearsal , it's the show so don't sit there thinking about it DO IT NOW
http://iainseven.wordpress.com/
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indykid
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| posted on 8/2/05 at 01:51 PM |
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matt,
we've run mk 2 cavs for as long as i can remember. never had a cambelt snap clean, but have a habit of stripping teeth. they don't do any
damage to the valves etc as the piston never reaches the valves. non interference comes to mind.
take the head off and have a play if you have a couple of spare engines. i know we do - its prudent to have plenty of spares with old cavaliers
incidentally, what's the bodywork like on your cav? how are the rear wings and floorpan? if its in good nick, fancy moving it on to a new home?
just my dad's looking to reshell a calibre
tom
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mattpilmoor
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| posted on 8/2/05 at 03:43 PM |
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Cav lives to fight another day!
Well the Cambelt had stripped the teeth at the bottom around the crank gear. It looks like what's happened is that the rocker breather had
blocked up with sludge, pressurising the oil rocker cover etc. This seems to have forced oil out where the fuel pump connects via a couple of o-rings.
The oil has been dripping down on to the cam belt probably softening up the teeth.
We got the belt off, cleared the breather, cleaned up the oil, topped it up, put a new belt on, and now it's running sweetly again - except it
souns like a panzer because the exhaust's gone!
Incidently the body work is almost perfect the only serious rust i have is around an engine mounting but i'll weld a plate in and it'll be
fine.
I know somebody who ran one of these for 275,000 miles (taxi) and scrapped it as a runner. Mines only done 100,000 so i'm hoping to have it a
while yet - at least until i get the locost finished 
Cheers for all the advice!
Matt
Measure twice - Cut once - Still f*!K it up!
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Ben_Copeland
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| posted on 8/2/05 at 04:11 PM |
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Told you it would be ok
Ben
Locost Map on Google Maps
Z20LET Astra Turbo, into a Haynes
Roadster
Enter Your Details Here
http://www.facebook.com/EquinoxProducts for all your bodywork needs!
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Mark Allanson
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| posted on 8/2/05 at 08:22 PM |
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It is always a good idea to change the water pump at the same time, the big O ring gets hard and when you tension the belt, it can crack - next job
head gasket
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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britishtrident
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| posted on 8/2/05 at 08:59 PM |
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8 valve Vaxhall is safe --- anything with twin OHC or 16 valves generally l bend valves after a failure..
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Mark Allanson
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| posted on 8/2/05 at 09:18 PM |
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quote:
Originally posted by britishtrident
8 valve Vaxhall is safe --- anything with twin OHC or 16 valves generally l bend valves after a failure..
I hope you mean they bend during the failure, bending them afterwards is just plain clumsy
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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