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ford 7w ten noisy running
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spitfirebob



Joined: 08 Oct 2012
Posts: 51

PostPosted: Sun Sep 08, 2013 9:38 am    Post subject: ford 7w ten noisy running Reply with quote

Hi all
I went out in car yesterday and noticed engine was running a bit rough and making loud rattling!!
Whilst checking things over I took the lead off of number 1 and engine smoothed out and stopped making noise
has anyone got an idea as to what is wrong?
thanks
Bob
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V8 Nutter



Joined: 27 Aug 2012
Posts: 587

PostPosted: Sun Sep 08, 2013 7:50 pm    Post subject: Reply with quote

It sounds like a piston to me. A big end noise will stop when you pull the plug lead, but that shouldn't make the engine run rough
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ka



Joined: 03 Dec 2007
Posts: 600
Location: Orkney.

PostPosted: Mon Sep 09, 2013 6:40 am    Post subject: Noise Reply with quote

Could be a lot of things,
has it just started, or getting progressively worse?
it it a knock that gets louder when you give it a slight rev?
it it a tapping noise there all the time?
does it sound from the top or bottom of the engine?
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KA

Better three than four.
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spitfirebob



Joined: 08 Oct 2012
Posts: 51

PostPosted: Mon Sep 09, 2013 10:40 am    Post subject: Reply with quote

Have been told its most likely head gasket
the noise was blow back through the carb, so head is now off and new gasket on order.
fingers crossed thats all it is
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Jim.Walker



Joined: 27 Dec 2008
Posts: 1229
Location: Chesterfield

PostPosted: Mon Sep 09, 2013 12:54 pm    Post subject: Reply with quote

Too late now to do a compression test.
But any gasket problem causing what you describe should be visible on the old gasket. If not, look further. You will probably be wasting your time and money by fitting a new one and doing nothing else.
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ka



Joined: 03 Dec 2007
Posts: 600
Location: Orkney.

PostPosted: Tue Sep 10, 2013 8:12 pm    Post subject: Head gasket Reply with quote

It is funny how some engines have permanent head gasket issues, and others never. I have been a lucky one, even running 8.5 to 1 compression.
Check the gasket to establish where it has blown past, whilst the head is off, get a decent thickness piece of glass, put some valve grinding paste on it, and run the head over it, this will possibly highlight any low areas, if it does, you need to get it skimmed, ideally the block as well.
If you do get the head sorted, put the head-gasket back on, with some decent sealer, I have heard that the heat resistant silicone stands up ok and will help the seal.
Best of luck.
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KA

Better three than four.
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Rootes75



Joined: 30 Apr 2013
Posts: 3788
Location: The Somerset Levels

PostPosted: Tue Sep 24, 2013 10:28 am    Post subject: Reply with quote

Was this the first time the engine has made this sound?
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