Detonation + High Temp

richd · 10-04-2001, 10:32 AM

I don't feel anything like shaking. But I do hear a sporadic ticking sound which increases in intensity at larger throttle openings. Do you think I should try advancing it a little and observing the differences?

I turned the distributor probably a total of 2 to 3 degrees. It's hard to tell because it was tight (even when the retaining wedge could be moved freely) and I would initially turn it too far. I really need one of those piston stops so I can get some timing marks.

Anyway, I did a little testing last night. Not much, because it was late. With the engine cool and the car parked on an incline facing up, I took off the radiator cap and started the engine. The radiator level was about 1-2 inches below top. After a few minutes of idling it slowly rose until it started spilling out of the neck. It wasn't hot, the return hose (top) was only slightly warm.

Earlier I had gone for a ride, and when the temp guage went above the middle marker (200*F mark?) I pulled over and felt the radiator and return hose. Return hose was hot and the top of the radiator was cool. I remember on other cars the radiator being hot everywhere (except maybe at the bottom).

I'm thinking of getting a new rad cap, thermostat and flushing the radiator with muriatic(sp?) acid. I have no idea when the prev owner last did maintenance on the cooling system, so maybe some things just aren't up to snuff anymore.

Thanks for the reply!

Rich D.

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10-04-2001, 10:32 AM	#3
richd Registered Member Join Date: Jul 2001 Location: Edison, NJ, USA Posts: 125	I don't feel anything like shaking. But I do hear a sporadic ticking sound which increases in intensity at larger throttle openings. Do you think I should try advancing it a little and observing the differences? I turned the distributor probably a total of 2 to 3 degrees. It's hard to tell because it was tight (even when the retaining wedge could be moved freely) and I would initially turn it too far. I really need one of those piston stops so I can get some timing marks. Anyway, I did a little testing last night. Not much, because it was late. With the engine cool and the car parked on an incline facing up, I took off the radiator cap and started the engine. The radiator level was about 1-2 inches below top. After a few minutes of idling it slowly rose until it started spilling out of the neck. It wasn't hot, the return hose (top) was only slightly warm. Earlier I had gone for a ride, and when the temp guage went above the middle marker (200*F mark?) I pulled over and felt the radiator and return hose. Return hose was hot and the top of the radiator was cool. I remember on other cars the radiator being hot everywhere (except maybe at the bottom). I'm thinking of getting a new rad cap, thermostat and flushing the radiator with muriatic(sp?) acid. I have no idea when the prev owner last did maintenance on the cooling system, so maybe some things just aren't up to snuff anymore. Thanks for the reply! Rich D.