3500 14 bolt heads.. But why the extra holes ??

mgbv8 · Post by **mgbv8** » Tue Dec 06, 2011 7:52 pm

I've got some heads on a 3500 I bought to freshen and re sell. But the heads have tappings and plugs in the blank mouldings just above each exhaust port?

What are they for! EGT sensors??

softdash3.9 · Post by **softdash3.9** » Tue Dec 06, 2011 7:57 pm

Emmissions, gas recirculation pipes fit into where the bungs are iirc

Darkspeed · Post by **Darkspeed** » Tue Dec 06, 2011 8:02 pm

Just cut one of them in half in the DIY porting thread - not an uncommon thing by all accounts and probably pulse air - air pump things for smog control.

Andrew

mgbv8 · Post by **mgbv8** » Tue Dec 06, 2011 8:02 pm

Thanks Royston!
I've had about 20 assorted RV8's over the last 10 years and this is the first time I've seen this. It came from a Landrover I think.

I'd like to know more about this if anyone has info or pics etc..

Perry

unstable load · Post by **unstable load** » Wed Dec 07, 2011 5:56 am

Could be for the US market. They are big on emissions controls.

kiwicar · Post by **kiwicar** » Wed Dec 07, 2011 10:39 am

Hi Perry
are they P6 or "SD1" heads, if they are P6 they could be off a 101FC or a stage 1 V8 (military ambulance). If they are "SD1" heads then probably off a SA or US spec landy. . . . not sure if that helps at all but you may have to answer questions abou them when you come to sell on.
Best regards
Mike

Quagmire · Post by **Quagmire** » Wed Dec 07, 2011 12:23 pm

Thats the "Pulsair" system that was fitted to Range Rovers etc, as stated above it basically put fresh air in the exhaust to improve emissions.