Why do all cars not have cam chains as apposed to belts!
Even across the luxury market - would a chain not make more sense! cann;t be cost at that level.
Cheers
jasongroves,
Nov 20, 9:24am
Why do you think all cars should have chains!
bill-robinson,
Nov 20, 9:27am
Why do they not have gear drive!
toysky,
Nov 20, 9:28am
Noall cars should have CHAINSnot belts this would save motorists money .
mugenb20b,
Nov 20, 9:29am
Why bother having chains or belts! Why not have a gear driven engine, like Nissan's TD27! Hang on, why bother having camshafts! Valves can be operated by solenoids.
jasongroves,
Nov 20, 9:29am
Oops, edited.
mugenb20b,
Nov 20, 9:29am
Not always.
bill-robinson,
Nov 20, 9:31am
Why not two stroke, no camshafts at all!
mugenb20b,
Nov 20, 9:31am
Indeed, and air cooled, no overheating.oh yeah, pollution.
toysky,
Nov 20, 9:32am
Are we not moving away from a genuine question!
cjdnzl,
Nov 20, 9:34am
Chains do not snap without warning.Chains last longer, are slightly noisier, and rattle when worn, giving a clue as to when they should be replaced.Personally I prefer a chain, which is partly why I drive a Primera, which has a chain.
mugenb20b,
Nov 20, 9:34am
You are saying that chains save car owner's money as opposed to belts. I disagree to a point.
mugenb20b,
Nov 20, 9:37am
A lot of Toyotas have 150 000kms cambelt intervals, that's a long time. However, I prefer GEAR drive, and I wouldn't own cars that have short cambelt intervals. Like Holden Astra.
bill-robinson,
Nov 20, 9:42am
You mean those rotaries cause more pollution!
bill-robinson,
Nov 20, 9:46am
Seen a lot of snapped timing chains, Chev V8 chains broke quite often with a lot of mixing of valves and pistons.
mugenb20b,
Nov 20, 9:58am
Rotaries are 4 stroke engines.
offrd1,
Nov 20, 10:08am
Check out the evinrudeE tect out board engine,they are 2 stroke and their emissions are less than a 4 stroke
unbeatabull,
Nov 20, 10:11am
Both have their merits, Chains are more prone (From experience) to jumping/skipping teeth, and can snap without warning. Generally aren't quite as easy to do as a cambelt, though some manufacturers do seem to make it as hard as possible to do the cambelts.
Cambelts have a definitive time period on them, you know when it's due. Also isgood chance to do all cam seals, water pump etc stuff that could be overlooked if you don't have the belt to replace.
Solenoid actioned valves are def the way of the future though.
crzyhrse,
Nov 20, 10:20am
There are many reason why you'd use a belt in preference to a chain and just as many reasons why you'd use a chain instead of a belt. Which ones are considered more important at the time of the choice being made will govern what is chosen on any particular day.
Chain: Pros: Long life Low maintenance Cons: more expensive to manufacture an engine to accommodate meaning the price point of the vehicle is higher - a significant factor when putting a vehicle into a market with a lot of competition. Noisier Less energy efficient
Belt: Pros: Cheap to incorporate in an engine design but maintenance access needs consideration Can also easily be used to drive the water pump More energy efficient Quiet Cons: Require periodic replacement Much more likely to fail without warning
bill-robinson,
Nov 20, 10:38am
Sorry,you are correct. what was I thinking of, must be the brap brap brap which no self respecting engine would do.
phillip.weston,
Nov 20, 11:21am
Chains were originally noisey, prone to stretching and were very costly to replace when they did require replacing. The introduction of cam belts resolved the issue of excess chain noise and were a bit cheaper to replace when they did need replacing. Nowadays chain technology has got so much better to make quieter chains and reduce stretching - HOWEVER there are many engines which have chains which are problematic - the first of the Holden Alloytec V6s spring to mind with them requiring replacement with uprated chains within the first 50,000kms. Many Nissan chain driven engines (ie QG and QR series) suffer from chain stretch giving all sorts of issues.
To me I don't mind if an engine is chain or belt driven because it's not such an issue to replace a belt, and providing they are replaced at the set intervals they are proven to be quieter and just as strong, if not stronger.
sr2,
Nov 20, 1:06pm
A good post there mate, (as always). I would add that with a chain needing lubrication the oil tight cam chain cover is often a source of oil leaks on some models.
the-lada-dude,
Nov 20, 1:15pm
rotaries were originally air compressors, but wankle decided to put a carby and spark plugs in it.they were built 4 strokers!
the-lada-dude,
Nov 20, 1:21pm
yes they have been fooling around with solenoid activated valves 4 F1 a while ago but it was too complicated and unreliable, and also gas springing has been used successfully
thejazzpianoma,
Nov 20, 2:19pm
STOP PRESS!
I have the solution, and there is always really just the one solution. Buy a Golf 2.0 FSI. then you can have both a Cambelt AND a Chain.
PROBLEM SOLVED!
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