inlet manifold pipe

Post Tue May 29, 2012 9:18 pm

iv had my inlet manifold off and replaced and im not sure if it was there before or not but iv now got a weird hunting at idle and after discussing this with some who had a similar problem it could be worn or missing orings around the pipe that is between the inlet manifold and the bottom of the block items 9-12 in the picture above.
Iv sourced some new washers and orings etc could someone confirm for me where exactly do i put the washers, orings etc are they fitted in the inlet manifold end and the block end or what???? cheers in advance

Post Tue May 29, 2012 9:26 pm

They go on the pipe at the bottom of the spring.

Post Tue May 29, 2012 9:31 pm

it lists 2 washers and 2 orings so which order do you fit them and is there any gasket fitted between the bottom of the inlet manifold and the pipe

Post Tue May 29, 2012 10:06 pm

It's been a while since I did mine but IIRC it's 1 O ring & 1 washer on the bottom & 1 O ring & 1 washer on the manifold end but thats as much as I can remember.

Post Tue May 29, 2012 10:21 pm

great thanks to clarify does the oring go in the whole first then the washer on top

Post Wed May 30, 2012 9:20 am

jonny323i wrote:great thanks to clarify does the oring go in the whole first then the washer on top

That's right,the spring presses down on the washer.

Easy way to re-assemble is to compress the spring with a couple of tie-wraps,assemble to the block,then slide the manifold on,locate the top of the tube and finally slice the tie-wraps.

Post Wed May 30, 2012 9:27 am

Make sure the O rings and the recess into which they fit are lubricated with a drop of oil before assembling.

Post Wed May 30, 2012 1:45 pm

Marvelous thanks

Post Fri Aug 10, 2012 7:22 pm

a useful post because I'm in the middle of taking the head off on my motor and wasn't expecting to find this pipe thing attached to the inlet manifold...

When i dismantled it, looking in the tube was like looking inside a jar of salad cream.

So my question is, does the mayo inside this tube signify an expected by-product of a blown cylinder head gasket, or does it point to a different prob altogether?

Post Fri Aug 10, 2012 7:53 pm

Mines still not right Jonny - I can see me having to take the fooker to bits again soon

Post Fri Aug 10, 2012 9:25 pm

what have you done so far matey

Post Fri Aug 10, 2012 9:47 pm

jonny323i wrote:what have you done so far matey

Bought an o-ring set from BMW - there was 4 in the bag but I only took 2 off and replaced them

Pig of a job to do in my small garage too

I need to have a proper got at it with carb cleaner to try and find the air leak

Post Fri Aug 10, 2012 9:48 pm

did you get the washers, spring and pipe too

Post Fri Aug 10, 2012 9:51 pm

No i just re-used the washers, spring and pipe - I guess the spring could be weak ?

Post Fri Aug 10, 2012 9:53 pm

when i did mine i replaced everything and it wasnt too exspensive one thing i did find i thought it would then pop up into the manifold on its own but after a quick twist it went further up into the manifold even with a new spring
Bring all the bits and if i manage to make it might give it a go while its still light

Post Fri Aug 10, 2012 9:54 pm

Don't worry mate I'll sort it - just try and get there tomorrow

Post Fri Aug 10, 2012 10:01 pm

willnz wrote:
AlpineCab wrote:a useful post because I'm in the middle of taking the head off on my motor and wasn't expecting to find this pipe thing attached to the inlet manifold...

When i dismantled it, looking in the tube was like looking inside a jar of salad cream.

So my question is, does the mayo inside this tube signify an expected by-product of a blown cylinder head gasket, or does it point to a different prob altogether?
blown gasket/cracked head

Good (in a perverse sort of way), that's what I thought it was, hence half way through replacing head with a spare.

Sounds like this pipe thing is a bit of a saga though....

Post Sat Aug 11, 2012 2:36 am

Pipe is part of the crankcase breather system,so it is not unusual to find it full of mayo....the bloody stuff has to accumulate somewhere...

As I posted ages ago further up,compress the spring with a couple of tie wraps,this aids the re-build!

Post Sat Aug 11, 2012 10:00 am

daimlerman wrote:Pipe is part of the crankcase breather system,so it is not unusual to find it full of mayo....the bloody stuff has to accumulate somewhere...

As I posted ages ago further up,compress the spring with a couple of tie wraps,this aids the re-build!

good news... new rubber seals and gaskets it is then...