Chris Williams' Journal
Home Page: Chris W
Gosford, NSW, Australia
| Total Posts: 225 | Latest Post: 2026-01-22 |
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Had to get a tow home this morning.
On the way into Gosford this morning it suddenly developed a serious sounding knock but only under load. I was just thinking how good it was running and apart from the noise appeared to be still running ok. Oil pressure still ok, about 60 but I had/have noticed a intermittent fluctuation in the needle.
Pulled over but had difficulty getting it to make the noise at idle and giving the throttle blips. Under light throttle it ran quietly and even though I was in heavy traffic I managed to get it somewhere I could leave it.
There was a noticeable difference in the exhaust note, a bit lumpy, not really a miss. Anyway I called for a tow and it's now at home in disgrace in the garage.
When I pulled over, I took off the rocker cover because the noise sounded like a heavy valve train noise but all appeared ok there and the slight noise I could get when blipping the throttle seemed to be coming low down at the back of the motor. Definitely sounded like it was inside and not some ancillary clunking/knocking.
When I got it home I started it and it ran a bit lumpily and there was noise at idle that I couldn't hear before but not the clunking. I shut it off and came inside and here I am.
I'll give it a compression check and go over the motor to make sure it's not something outside but I have this feeling that another pulldown is in my future.
It's only got about 10,000 miles on the complete engine rebuild but I assembled it myself so anything is possible.
I'll get back to you,
Update. Well the head's coming off to start with.
Compression test: Cyl 1 = 0, unable to be measured and severe sucking noise coming from 2 during cranking. Cyl 2 = same as 1 with the same sucking noise from 1, Cyl 3 = 120, Cyl 4 =140.
Definitely something going on between 1 and 2, however, I can't see that this is the main game, I'm pretty sure there is something else going on lower down.
Anyway the heads got to come off so I'll have some more news later.
After that and if there's nothing to indicate the clunk, rather than fiddle about under the car with the pan, I think I'll just pull the lot. It wasn't that long ago that I did that with the gearbox/clutch fix so I think I'll do it that way and give the lower end a good checking out. Best case it's a set of gaskets and a couple of days. But I just want to be sure.
On the way into Gosford this morning it suddenly developed a serious sounding knock but only under load. I was just thinking how good it was running and apart from the noise appeared to be still running ok. Oil pressure still ok, about 60 but I had/have noticed a intermittent fluctuation in the needle.
Pulled over but had difficulty getting it to make the noise at idle and giving the throttle blips. Under light throttle it ran quietly and even though I was in heavy traffic I managed to get it somewhere I could leave it.
There was a noticeable difference in the exhaust note, a bit lumpy, not really a miss. Anyway I called for a tow and it's now at home in disgrace in the garage.
When I pulled over, I took off the rocker cover because the noise sounded like a heavy valve train noise but all appeared ok there and the slight noise I could get when blipping the throttle seemed to be coming low down at the back of the motor. Definitely sounded like it was inside and not some ancillary clunking/knocking.
When I got it home I started it and it ran a bit lumpily and there was noise at idle that I couldn't hear before but not the clunking. I shut it off and came inside and here I am.
I'll give it a compression check and go over the motor to make sure it's not something outside but I have this feeling that another pulldown is in my future.
It's only got about 10,000 miles on the complete engine rebuild but I assembled it myself so anything is possible.
I'll get back to you,
Update. Well the head's coming off to start with.
Compression test: Cyl 1 = 0, unable to be measured and severe sucking noise coming from 2 during cranking. Cyl 2 = same as 1 with the same sucking noise from 1, Cyl 3 = 120, Cyl 4 =140.
Definitely something going on between 1 and 2, however, I can't see that this is the main game, I'm pretty sure there is something else going on lower down.
Anyway the heads got to come off so I'll have some more news later.
After that and if there's nothing to indicate the clunk, rather than fiddle about under the car with the pan, I think I'll just pull the lot. It wasn't that long ago that I did that with the gearbox/clutch fix so I think I'll do it that way and give the lower end a good checking out. Best case it's a set of gaskets and a couple of days. But I just want to be sure.
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