what do you think this noise is?

[gingerbreadman]

on my 79 cruiser there is a sound like a bomb ticking away..almost like a very loud clock right behind the glove box dash area. it only lasts for 5 minutes once i start up but then goes away? It is consistent with the amount of revs the motor is doing but i do not have to be moving for it to happen. relay maybe? its coming from somewhere in this area in the pic but i cant tell if its external or internal. Pretty sure i can feel it if i put my hand in the glove box.

[De-lux]

From memory your glow plug relay is behind there (if it's a diesel)

[RAY185]

If the ticking increases and decreases with engine revs then I'd be surprised if it's a relay. Most likely an exhaust manifold/engine pipe leak. Look for black sooty deposits around the manifold/engine pipe. As exhaust gets hotter it expands and shuts the leak up. Most likely at the manifold to head face.

[gingerbreadman]

petrol 2f motor so not that dlux.
no vacum or manifold leaks ray from what i can tell. this noise is certainly more electrical sounding . i have found a relay up under tyhere behind the glove box just then but will have to test it out with a passanger next trip. i did learn one thing just then, the car had a good 15 minute drive . I stopped for 30 seconds and restarted and the noise came back so its not engine temp related.