Badly Cracked Ex Manifold

[Spiky 37]

would this cause the engine to not tick over and pop a little?

[welshpug 1,657]

possibly

[Mikey G 3]

Cant see it making it not tick over but it will definatly make it pop.

Edited March 27, 2007 by Mikey G

[Spiky 37]

hi matey

 

welcome

 

was ticking over fine, then i changed afm and now it dont after a run, and yeah i put the old afm back on and no ir didn't fix it

 

if i rev 2k and over there;s no missfire, but if i hold it around 1000 it seems to missfire,

 

also if i blip the throttle i get and backfire from the exhaust ??

and once i heard it in the engine bay,

 

which then made me look and i fouind the cracked manifold

[Mikey G 3]

Hi Spiky

 

Sounds like you may have an air leak somewhere.

[Spiky 37]

well i just checked and all looks ok, it's cooled down a bit, and was better, then when it got hot it;s crappy again

[Mikey G 3]

You would be surprised at the number of places i have found air leaks on these. Injector seals, inlet gasket and i also found the bolt hole on the inlet manifold that the oil filler bolts to broken through causing a nice big leak on the number 1 inlet tract.

 

Check the colours of the plugs, see if any of them stand out different to the rest.

 

Also if you changed the AFM make sure you put the pipes for the S.A.D and breather back on the right way around.

[Spiky 37]

You would be surprised at the number of places i have found air leaks on these. Injector seals, inlet gasket and i also found the bolt hole on the inlet manifold that the oil filler bolts to broken through causing a nice big leak on the number 1 inlet tract.

 

Check the colours of the plugs, see if any of them stand out different to the rest.

 

Also if you changed the AFM make sure you put the pipes for the S.A.D and breather back on the right way around.

 

 

 

well i think i found it

 

 

a bolt that holds the oil breather/filler had come out, seems to tick over ok now

 

thats the good news, bad news how the fook do i get 20yr old exhaust manifdol studs out???

[Mikey G 3]

well i think i found it

a bolt that holds the oil breather/filler had come out, seems to tick over ok now

 

Thats the one i mentioned above, found it on 2 seperate cars now. The hole should be sealed but people have been known to put longer bolts in them causing the hole to break through to the inlet.

 

As for the exhaust bolts, get it hot and try it that way.

[Spiky 37]

Thats the one i mentioned above, found it on 2 seperate cars now. The hole should be sealed but people have been known to put longer bolts in them causing the hole to break through to the inlet.

 

As for the exhaust bolts, get it hot and try it that way.

 

 

cheers matey, i didn't quite read your reply properly

 

 

as for the stud, they are so bad that i put a spanner on them and they ALL rounded off, would any pressure at all

 

looks like i'll need to angle grind them all off, and replace all studs

 

 

though no sure i'm going to be able to do this with the engine in situ?

 

 

mikey, you working next week?

 

i got a week off to sort the car, and was wondering if i can have you set it up? mainly the timing???

[Mikey G 3]

As you probably know i have 2 conversions in progress at the moment. I am nights next week so may be able to come down one evening if Stu fancies a trip down.

[Grim.Badger 15]

thats the good news, bad news how the fook do i get 20yr old exhaust manifdol studs out???

 

The studs aren't normally that difficult, except cylinder 1 lower has caused me problems on two engines. Split the nuts off with a chisel, I've handily got a 1ft one which is good for getting the lower ones off. Once the nuts are off take the manifold off and remove the studs with either a stud remover tool or two nuts tightened against each other.

 

Once the manifold is off you may want to get some penetrating oil on the studs (NOT WD40) just in case but they were easy enough to shift on my 110k engine, except cylinder 1 lower which was snapped by the last owner.

 

Peugeot exhaust gaskets are meant to be the best and aren't that expensive. It's also worth getting new studs and Peugeot sell fancy copper 13mm nuts as replacements for the old ones Be careful though as the dealer may want you to buy whole bags (20) of the studs and nuts.

[matty_gti 20]

Im goin to replace my manifold soon as on No 1. tube i have a huge crack going all the way around,lol, makes a very VERY loud ticking noise untill warmed up. Is there anything i can put on it that could seal it for the time being?.

 

And regarding what you said about two nuts togther and removing the studs......how?

 

ThAnKs

[t16ryan 1]

i have a 4 branch will be ebaying this week if interested magnex i believe

[Grim.Badger 15]

And regarding what you said about two nuts togther and removing the studs......how?

 

Put two 13mm nuts on the stud, tighten them against each other, then try and undo the lower one. Because the upper nut will stop it rotating on the stud it should rotate the stud instead.

 

I hope that makes sense

[matty_gti 20]

i have a 4 branch will be ebaying this week if interested magnex i believe

 

ooo, with the four branch manifold will it fit the standerd system or do have to use the rest of the 'manifolds make' system?....i.e a magnex manifold onto a magnex centre pipe and back box?