186 on blue 202 block

[low n slow]

i have recently put a high comp 186 head on my blue 202 block,
i now have a boiling problem im pretty sure. i drove the car for almost 100 metres yesterday and the temp gauge went rose to half way so i took it back home and let it cool down i have no idea why?
since the conversion my battery light is staying on and most of the dash is not working when i first drove it after putting the head on i heard a click behind the dash and the light came on? i have changed the regulator on the altinator but didnt change anything?

 

[Lamo]

http://forums.justcommodores.com.au/vb-vk-holden-commodore-1978-1985/36164-186-head-202-red.html

This might help. Sounds like you have blocked some of the water galleries.

 

[low n slow]

thanks for that, when i put the head on on drilled the holes in the head so they match up, but there isent a hole at the end of the block so i didnt drill one there but im thinking it might be boiling there

 

[the_boozer]

you got rid of a 12 port head and put 9 port head on with smaller valves?
what carby you using? mabe a blown fuse from a wire not used earthing out somewhere.
Did you have to redrill the block? If the alternator charge light dont work the alternator wont charge

 

[low n slow]

i put a reco 186 head on with bigger valves and port work with a ww stromberg carb,extractors and a cain inlet manifold, yea i thought so to but everything looks alright, but after a few days with a immobilser shouldnt the battery be dead if the altinator is dead?? ive been told it may be a voltage stabiliser behind the dash ?
i didnt redrill the block at all?

 

[low n slow]

drove it just now still boiling but when i rev the guages that are working are move up with the revs all the fuses are fine and there was a temp sensor wire floating around but thats good now. Still have no idea why thats all shitting its self

 

[GypsyNz]

I cant remember but there is a difference with the water jackets between red & blue/black, one will be blocked and causing it. I'd say you'll have to take the head of to compare what the difference is, even the head gaskets will be different to......

 

[low n slow]

cheers, im pretty sure when we did it theres a whole in the head and where it should be on the block there isent one at all so yea mayb thats its ill rib it off and have a look, we put wholes in the gasket to suit we used a red motor gasket