• Hi Guest!
    You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

it's cold outside

Share this page

Seems almost easier just to swap in another core and then get the old one cleaned out for a spare. That's the plan now. I'll be able to get something from Bill tomorrow, then I also have one coming from Ebay. Between all those cores there ought to be one that works eh?
 
Did we already discuss the foam rubber between the heater box and the heater shelf?
 
Yes, and I put some in there which brought me up from zero heat to sometimes heat.

From looking at it, since there was nothing there when I bought the car, it seemed ok that I could see right into the plenum. After learning there was supposed to be something there I stuffed both sides with some foam rubber.
 
Rick,
Can you explain in detail how all the coolant plumbing is configured on your car? Since you have the engine swap I'm wondering if the supply to the heater core is restricted when the thermostat is closed. I know I've been thinking of this as if it was a BL engine not a Nissan.
 
Rick,

I am getting in late on this, and maybe you have already tried this, but it is pretty easy to remove the core from the metal housing. When I removed mine, the fins where filled with all manner of leaves, dead bugs and garbage. Quick work with an air compressor took care or this. Also, with the core out, you can stick a water hose in the core inlet, blast out all the dookie inside. I was able to get quite a bit of gook out this way.

Sorry if I am repeating advice you have already heard/tried.
 
I was thinking the ease of removal in an A series set up, forgot it was a Nissan. Sorry.
 
Heater is original to the car, not Nissan.

The front of the engine has a tube that exits about halfway down on the drivers side. This tube connects to the lower radiator hose and to the heater hose.
It also used to "T" off to the intake manifold. I removed the "T" so it's a straight shot from there to the top hose connector on the heater core.
The bottom hose connector on the heater core appears to connect directly to the back of the head. It used to go through the standard MG water valve, which I've removed for simplification of this "repair".

Trevor, that sounds reasonable given that I didn't even have a seal under the unit anything could have been done in there. I'll pop it loose at my next earliest chance and take a look.
 
I see I am going to have to buy a long philips screwdriver. Mine are all too short for this job!
It looks like I only need to remove the screws from the front of the unit and pop off the springy fasteners to gain access, right?
 
True, no philips on a long rachet extension? Give the screws a dose of pbBlaster while you wait.
 
Honestly didn't think of that one Jack, I do have that kit.
Maybe it will hold off the snowing until after I can get to it. :wink:
 
Those of us that are so old we took our first stove bolt six apart with a pair of pliers and a flat head screw driver think all all kinds of tool work arounds. Of course I mostly have all the right tools now at the other end, hehe. Any excuse for a new tool. Heck, if I don't have one its because I have two.
 
Back
Top