Engine Noise

SteveG

SteveG

Club Member
Hi all,

I am in need of some help to identify an engine ticking noise. With all the experience in the club I thought I would ask your expert opinions.
I have tried listening around the engine especially the rocker cover with a plastic tube to the ear and nothing jumps out as the culprit.
The noise seems louder near the injectors.
I have checked the valve clearances and they are slightly on the low side by only 0.05mm so I don't think that is the cause.
I have only had the car since May and not done many miles. The noise seems to have come on gradually.
If fuel was a factor the last time I put super unleaded. Before that I did use E5.

Hoping you can help, below link to a video I took

https://youtube.com/shorts/I4G7ML_WEOw?feature=share

Thanks in advance
Steve
 
I think you need to change the settings on youtube for us to be able to see or hear it.
 
jonbills said:
I think you need to change the settings on youtube for us to be able to see or hear it.
Click to expand...
Thanks, I'm not familiar with using you tube, but I have changed setting to allow anyone with link to view. see if that works thanks
 
I can see it now.
but I can't really hear anything unusual.
A little valve noise, but nothing worrying.
(but I am a bit deaf :))
do you know what sort of cam you have? can you see any wear on the cam or rockers?
 
moggy240 said:
Exhaust gasket blowing?
Click to expand...

I was going to suggest this as Moggy said. I have a similar noise that only becomes evident when the car has started to warm up and I suspect the cause to be the exhaust gasket. Winter project to find out as swapping the gasket on a 280ZX is a bit of work with all the plumbing involved on the inlet.
 
jonbills said:
I can see it now.
but I can't really hear anything unusual.
A little valve noise, but nothing worrying.
(but I am a bit deaf :))
do you know what sort of cam you have? can you see any wear on the cam or rockers?
Click to expand...
No I don't know what sort. it should be standard. I had a look around and I did notice a small hole in the cam (not the oil ones) on the edge. It seems not in line with the rocker arm though.
 
Huw said:
I was going to suggest this as Moggy said. I have a similar noise that only becomes evident when the car has started to warm up and I suspect the cause to be the exhaust gasket. Winter project to find out as swapping the gasket on a 280ZX is a bit of work with all the plumbing involved on the inlet.
Click to expand...
Interesting that 2 say exhaust gasket. I need to investigate that. Is there easy way to tell? thanks
 
SteveG said:
No I don't know what sort. it should be standard. I had a look around and I did notice a small hole in the cam (not the oil ones) on the edge. It seems not in line with the rocker arm though.
Click to expand...
have you got a photo of that bit of the cam?

if you've got an exhaust gasket leak, you might have some soot showing on the head there. also you'd definitely be able to pick it up with your stethoscope tube.
 
I had a leak on an exhaust gasket to cylinder head and it made a clicking noise, look for any soot.
 
Before taking anything apart or going nuts trying to find a leak, try tweaking the nuts/bolts on the manifold first. They may have worked a little loose over time. It only needs a fraction for it to blow.
 
jonbills said:
have you got a photo of that bit of the cam?

if you've got an exhaust gasket leak, you might have some soot showing on the head there. also you'd definitely be able to pick it up with your stethoscope tube.
Click to expand...
Here is a photo of the hole IMG-20211120-WA0003.jpg
 
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