nib1980
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| posted on 3/7/08 at 07:43 PM |
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Tappetts? (spelling)
H all,
I was out driving tonight, and I noticed a noise I hadn't heard before, and it reminded me of an old sierra i had years ago.
I sounded like the tappets?
I have a 1.3 xflow,
1.question is, how often do they need adjusting?
2.why would the noise come on all of a sudden?
3. How hard to adjust them and how?
4. what happens if i don't adjust them? (anything go pop?)
Many thanks
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rusty nuts
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| posted on 3/7/08 at 07:53 PM |
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in order 1 probably every 6,000 miles 2 Worn cam,worn followers , worn rockers , worn rocker shaft, has it lost power, could be bent valve due to
overrevving? or if your lucky the shaft retaining bolts may have come loose 3 Easy , set to TDC and use feelers to check clearance , adjust using the
adjuster screw, What cam do you have as clearances alter?. 4 It may cause the engine to stop . Get a new rocker cover gasket as its bound to break
if you don't
[Edited on 3/7/08 by rusty nuts]
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nib1980
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| posted on 3/7/08 at 08:03 PM |
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Hi,
Sounds fair then, it's done about 5000 miles, no overrevving, and no loss in power
not sure waht the cam is though, suspect it's a GT as the engine was from a 750MC racer.
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nib1980
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| posted on 3/7/08 at 08:29 PM |
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anyone know what clearance i shold be setting it too?
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Mark Allanson
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| posted on 3/7/08 at 09:20 PM |
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Autodata is a wonderful program!
 
Rescued attachment info.jpg
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 3/7/08 at 09:24 PM |
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Tappets usually get noisey very gradually, for an xflo tappet to suddenly sound as bad as a Pinto with a knackered cam shaft is unlikely unless a
follower had brocken.
Other suspects in order of severity
Alternator loose in its bracket bracket
Piston slap
Little end
*Big end.
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Chippy
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| posted on 3/7/08 at 11:01 PM |
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You do NOT adjust tappets on TDC, you need to set up the engine position for each, (sometimes two) to be adjusted. Best bet buy a book, (Haynes), that
covers that engine, with that it will be a doddle. Cheer Ray
To make a car go faster, just add lightness. Colin Chapman - OR - fit a bigger engine. Chippy
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jollygreengiant
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| posted on 3/7/08 at 11:17 PM |
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Xflow engine is rule of NINE.
Valve 1 fully open - Adjust 8
Valve 2 fully open - Adjust 7
Valve 3 fully open - Adjust 6
Valve 4 fully open - Adjust 5
Valve 5 fully open - Adjust 4
Valve 6 fully open - Adjust 3
Valve 7 fully open - Adjust 2
Valve 8 fully open - Adjust 1
Hope this helps.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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nib1980
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| posted on 4/7/08 at 07:25 AM |
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I'm driving it in to work today and I realised waht the noise is, it's the exaust manifold blowing.
DOH!
looks like a much easier fix now!
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02GF74
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| posted on 4/7/08 at 09:03 AM |
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I was just about to say that! 
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David Jenkins
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| posted on 4/7/08 at 11:20 AM |
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Me too! 
I have a 4-branch manifold and one of the mounting faces isn't quite in line with the rest - sometimes it'll leak a tiny amount, and the
sound it makes is just like a rattling tappet. I fixed it with a new gasket and some exhaust paste.
Flattening the faces off is one of those 'round tuit' jobs that I'll attend to the next time I do any major engine work.
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