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Author Topic: mpg and blowing exhaust manifold  (Read 901 times)

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simon allen

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mpg and blowing exhaust manifold
« on: 23 October 2009, 16:17:04 »
Hi guys,
I sorted the cd changer problem, now the only thing left to do is my exhaust manifold. it's a 2.0 16v auto, and autodata says they are prone for warping? it is definately blowing (sounds tappy like a lifter but it is definately the fannymould)

would this be why I'm only getting 21.4mpg?? or are they all like that?
I bought it because my 4x4 (lada niva with a 2.9v6 ford engine and auto box  :y ) was too thirsty at 18mpg....
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JamesV6CDX

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Re: mpg and blowing exhaust manifold
« Reply #1 on: 23 October 2009, 16:19:56 »
They have been known to break/crack - never seen a warped one but that's not to say it doesn't happen.

Before checking that though - make sure number 1 stud hasn't broken - that's the most common cause...
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simon allen

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Re: mpg and blowing exhaust manifold
« Reply #2 on: 23 October 2009, 16:21:09 »
Cheers mate will have a look in a minute :)
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JamesV6CDX

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Re: mpg and blowing exhaust manifold
« Reply #3 on: 23 October 2009, 16:21:49 »
You'll probably need to take the heatshield off.

Where are you based?
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simon allen

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Re: mpg and blowing exhaust manifold
« Reply #4 on: 23 October 2009, 16:39:48 »
took the heat shield off can see the crack. All studs are fine from what I can see. probably a different story when I try un screwing them....  >:(

Based in telford mate  :)
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lada niva 2.9v6 auto - the nutty underdog


"though this be madness - there be method in it"

JamesV6CDX

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Re: mpg and blowing exhaust manifold
« Reply #5 on: 23 October 2009, 16:59:05 »
Give the studs a darn good soak in plusgas before removing..!
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simon allen

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Re: mpg and blowing exhaust manifold
« Reply #6 on: 23 October 2009, 17:23:59 »
already done mate. Plan on taking it off in the morning and migging up the crack until I can find a replacement... and then probably keep the replacement in a box until it starts blowing again, which it inevitably will...

Thanks for the help so far. any ideas if my mpg is normal? or should it be higher? I don't drive quickly (learned that lesson 3 years ago when I rolled a 406 and broke my back - the joys of being 19  ::) ) so would have thought I should be getting mid to high 20's?
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lada niva 2.9v6 auto - the nutty underdog


"though this be madness - there be method in it"

Abiton

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Re: mpg and blowing exhaust manifold
« Reply #7 on: 23 October 2009, 17:38:58 »
Our manual 2.0 does about 30mpg average, mixed driving, and driven pretty gently.

If you do a fair amount of town driving, and with the autobox, your numbers wouldn't be too far off I'd guess.  :'(
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simon allen

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Re: mpg and blowing exhaust manifold
« Reply #8 on: 23 October 2009, 17:42:00 »
yeah fair bit of town driving. it's only 5 miles to where I work as well so i guess it's about right if yours is doing that.

ahh well... lpg i guess (got a single point kit in the garage I was going to fit to the lada)

Cheers
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"though this be madness - there be method in it"

ENFIELD_MV6

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Re: mpg and blowing exhaust manifold
« Reply #9 on: 23 October 2009, 17:53:53 »
just slightly of topic my misses focus round town is doing etween 18 - 22 mpg 1.6 with fsh, and it dont matter if she drives it or i drive it with my lead foot, thankgod its going in the next few days and we will have the scenic
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Selseybill

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Re: mpg and blowing exhaust manifold
« Reply #10 on: 23 October 2009, 17:56:22 »
I got a 2.0.the exhaust gasket went on mine.Make sure you replace the gasket with the modified 3 piece metal type.As for Mpg i get on local runs as a taxi around 29-31 mpg.On a run to France full loaded with trailer I've seen 41 mpg
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