-
The Z Club relies on the support of it's paid members - join the club or renew your membership here.
What did you do to your Z this week?
- Thread starter jonbills
- Start date
They had a quick look with the borescope and it doesn't look like there was any piston/valve contact, so I'm hoping it's only the cam, a couple of rockers and a couple of lash pads. I've got a spare of the cam and some spare rockers, so might not be too painful.
Yeah, I was hoping to push on to 9k later
My guess is that with those revs there was some valve float and a collet or a lashpad came out, which displaced the first rocker which hit then next and so on. All the damage is constrained between cam tower 3 and 4 (so cylinders 4 and 5).
This head is going on the LD32; I think I'll have to set the rev limiter to 8000 sadly.
And thank you all for the sympathy, I expected ridicule
Jon, nobody wants to see a mate's engine do that.
I've been checking out the damage to my engine. All 4 rockers have cleaned up fine. 4 lash pads broken and 2 cam lobes damaged. 1 collet jammed in the valve retainer. There's no contact between valves and cylinders, although piston and head have been getting very very close. I mean close.
Maybe drill a couple or lines of holes so you can get a hacksaw blade in and saw out to the tube. Then heat, oil and whacking.Well that didn't go according to plan, I have a feeling this may have never been apart before. By the way it was pretty gnarled with grip marks before I started. Just need to figure out how to fix it now.
View attachment 41485
MaximG
Well-Known Forum User
Haven’t gone down that route quite yet. Re welded the plate back on to the feral used a fair amount of heat, WD40 and some 3’ long Stillson‘s but still no play time. Left my Dad to play with as he’s bored apparently. Just hope the passenger side proves more forgiving. Oh and is the top mount bearing supposed to rattle
RawlinSTR
Club Member
That's a pretty elaborate crank sensor mount - is that something you got machined up yourself?
I hadn't noticed that! that sensor isn't going to move.
I might have a spare one, I presume you are changing your shock absorber. What you can do is run some weld round the top as the heat will cause it to expand and then shrink as it cools breaking the seal so that you can get off.Well that didn't go according to plan, I have a feeling this may have never been apart before. By the way it was pretty gnarled with grip marks before I started. Just need to figure out how to fix it now.
View attachment 41485
MaximG
Well-Known Forum User
Mike thanks very much for the offer but I’ve managed to source a replacement pair. I’m going to persevere anyway and hope to have something usable in the end as a spare.
Rushingphil
Club Member
niroshann
Club Member
Non mechanical work. Looks nice on the face of things! RB25DET skyline gauges into the 280zx. Been working reliably for over a year and now I am transferring over to my other car. Just need to get some rings to fit around the dials to bridge the gaps between the ZX cluster gauge cutouts and the smaller skyline gauge faces.
