Series 3 heater hose connection to back of the engine

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Jules59

Jules59

Member
Posts
45
Location
Warwickshire
My S3 project was originally a petrol and had a diesel 10J installed long before I bought it.
Heater was never re-connected AFAIK, so I thought It would reconnect the heater.
The connection point at the back of the engine had been blanked off.
heater blanked.jpg

I bought a new hose connector but it doesn't fit in the cylinder head - the threads on the blanking plug is finer than that of the connector.
connector vs blank.jpg

Has the wrong thread bolt been forced into the head or is the connector wrong.
I dont know what thread is correct. But using the gauge in my tap/die set the connector appears to a 19 pitch BSP and is 16.3mm in diam whereas the bolt thread is 15.8mm diam with 100 pitch
Any help would be greatly appreciated.
 
Oddly the heater control valve is fitted at the front of the engine but the hose is blanked before the connection with the long pipe that goes to the back.

The connector I bought is part number 624091 . Is that correct ?
 
What year is your cylinder head check the information in attached pdf
See pic of optional parts metric and imperial pipe connector to block
 

Attachments

  • 2.25-Petrol-cylinder-head-identification-min.pdf
    126.3 KB · Views: 342
  • series 3 heater connector.JPG
    series 3 heater connector.JPG
    120.8 KB · Views: 246
Last edited:
Blackburn said:
What year is your cylinder head check the information in attached pdf
See pic of optional parts metric and imperial pipe connector to block
Click to expand...

Many thanks.
I didnt realise later heads changed to "american" metric m16x1 (not M16x1.5) The adapter ERC9453 is about £50 !! :eek: (probably why it the heater was never connected ), it is x10 the price of the imperial - typical.
Would it be possible or sensible to use a 3/8BSP tap in the metric adapter hole. Or will I most likely ruin the head ? The latter probably.
 
Blackburn said:
What year is your cylinder head check the information in attached pdf
See pic of optional parts metric and imperial pipe connector to block
Click to expand...
I dont know the manufacturing date but I believe it to be a late 2.25 diesel. The cylinder head says HRC1353 and the engine number is 10J00338B
 
Jules59 said:
I dont know the manufacturing date but I believe it to be a late 2.25 diesel. The cylinder head says HRC1353 and the engine number is 10J00338B
Click to expand...
I replaced mine on a late diesel (5 bearing) last year. I just punched the part number in Google and ordered the cheapest one. It can’t have been much money because I’m very tight and wouldn’t spend over ten pounds for a simple plumbing fitting.
I can’t remember the supplier but it came unbranded in a plastic bag from memory.
 
Bobsticle said:
I replaced mine on a late diesel (5 bearing) last year. I just punched the part number in Google and ordered the cheapest one. It can’t have been much money because I’m very tight and wouldn’t spend over ten pounds for a simple plumbing fitting.
I can’t remember the supplier but it came unbranded in a plastic bag from memory.
Click to expand...
Try it now ERC9453 - but sit down first
 
True, brass fitting v cast steel cylinder head?
Cylinder head wins. PTFE tape cures any remaining wounds.
 
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