24v access to knock sensor under pipe?

Lost · Jan 3, 2018

My 164 24v has knock 2 sensor error, it should be sensor on air filter side ?

I have plenum and chrome pipes removed, and want to pull big water pipe between heads to gain access to knock sensor, i tried to remove screws on that side and pull pipe, but it won't go.

Is there any bolts on water pump side or its just pushed in?
Can it be removed without removing water pump?

And if knock2 error in ECU does not impact performace (limp mode), should i leave it as is? (maybe its wire harness faulty, becouse if i just connect now sensor error remains)?

I also need torque specs for valve cover if someone knows.

Alfisto Steve · Jan 3, 2018

You probably can't get coolant pipe our of housing on top of water pump because it is corroded in place and it has two rubber o-ring seals on it.

If you remove thermostat and middle housing with two hose to heads you can unbolt lower housing from pump and maybe lift up coolant tube enogh too can access to rear knock sensor.

I had to destroy lower housing on a 24v engine to get tube out of housing because of sheared off thermostat bolts.

Here is picture of old and new one: http://www.alfabb.com/bb/forums/704849-post10.html

Lost · Jan 4, 2018

Thanks for tip!

Do you think i will be able to use small torque wrench to replace knock that way?

alfettaparts2 · Jan 4, 2018

coolant pipe

Steve is correct about the corrosion but worse still people glue the pipe in with sealant. Maybe to lazy to change the o'rings they just refit the pipe with crap. Change the o'rings and use some rubber grease when you re-fit. No sealant.

richardbradford · Jan 16, 2018

alfettaparts2 said:
Steve is correct about the corrosion but worse still people glue the pipe in with sealant. Maybe to lazy to change the o'rings they just refit the pipe with crap. Change the o'rings and use some rubber grease when you re-fit. No sealant.

Any dimensions/part numbers for these o-rings? Thanks.

Errrr, scrap the above and check the reply above from Super Steve, which answers everything

Alfisto Steve · Jan 4, 2018

I doubt you can even get simple wrench in to use on knock sensor much less a torque wrench. Surely you can just hand tighten bolt and just a pinch more as I am guessing it is a M6 size bolt.

Look at pix post 9 in the whole thread on w/p change. I don't think you will be able to get to knock sensor with coolant tube installed. http://www.alfabb.com/bb/forums/164...ums/164-168-1991-1995/146239-myrons-95ls-water-pump-now-leaking.html#post704849

Alfisto Steve · Jan 13, 2018

Alfa 164 24v coolant tube o-ring info

No I do not have any of those 14458680 seals to measure them, but Difatta has them in stock at pretty good price.

1445868000 O/RING SEAL www.difatta.com giovanni@difatta.com

Also used on Fiats, Lancias and FORD New Holland tractors it seems:

CNH-FORD New Holland O-Ring 14458680 OEM NOS, USA MADE, 1.487" ID x .103" Thick

Description:
References equivalents:
14458680
60808353 old Alfa Romeo number according to my eper
1445868000

richardbradford · Jan 16, 2018

By the way, if any of your 24v thermostat housing top 3 bolts do break you can drill them out using very long drill bits (think 20cm plus). Such drill bits are not cheap and took almost a day to drill out mine but saved trashing the housing.
Just a thought....

24v access to knock sensor under pipe?

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