1982 GTC project gumtree

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Re: 1982 GTC project gumtree

Post by AJL Electronics » Sun Jun 04, 2017 4:54 pm

There is a chance that I may have a pipe. I will look tomorrow.


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Re: 1982 GTC project gumtree

Post by ard126k » Sun Jun 04, 2017 5:04 pm

All straws gratefully clutched at! Thanks.


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Re: 1982 GTC project gumtree

Post by Roger Pennington » Sun Jun 04, 2017 7:19 pm

Yes, I had a HP pipe made up locally. I went for fully flexible as it makes the unions much easier to re-attach as you're not fighting the pipe, which always seems to force the unions out of line. Though it's not quite "fully" flexible, they did re-use the last couple of inches of pipe and the unions, it makes it easier to handle the sharp bends at the ends and I believe the unions are a size which is a bit hard to get these days (probably an imperial size?).


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Re: 1982 GTC project gumtree

Post by ard126k » Fri Jun 09, 2017 4:54 pm

Since I haven't heard from you AJL I guess you've not found a pipe so I went along to Pirtek. After a bit of huffing and puffing and scanning their (extensive) shelves they managed to knock up something with an adapter that fitted -
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and does away with the cable tie although there are another couple further along -
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I'm not claiming total success yet though because they didn't use the flare inside the rack housing to seal it, they trimmed a bit off the adapter and used a sealing washer between the adapter body and the housing. So we'll see once the engine runs and the pump pumps...


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Re: 1982 GTC project gumtree

Post by AJL Electronics » Fri Jun 09, 2017 6:08 pm

Yes, glad you are sorted. I still haven't unearthed the high pressure one that I am convinced that I have. If your Pirtek is unreliable give me a nudge and I will turn some more boxes out.


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Re: 1982 GTC project gumtree

Post by ard126k » Fri Jun 16, 2017 9:59 pm

All is going well with the front suspension, good to be back on familiar ground after the engine bay exploration. Just needs a few new nyloc nuts and rubber bits to be good as new.
I was just thinking about the day when I can finally drive the car. I've never had a convertible before - is the standard procedure to leave the soft top in place all year round and just remove the hardtop when the weather looks promising?
Goof of the week - I rigged up a temporary fuel supply so I could run the motor for more than 2 seconds but it wouldn't idle below 2K RPM. Inlet air leak I thought and I was not looking forward to tracing it. Wasn't that hard in the end - I've removed the servo to clean up the ignition module and left the vacuum pipe dangling open. Plugged with a drill bit and the engine idles about 500 RPM. Hoorah!


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Re: 1982 GTC project gumtree

Post by scimjim » Fri Jun 16, 2017 10:04 pm

Standard procedure is to trip over the hardtop so many times that you eventually lift it into the roof of the garage until it becomes hidden in the rafters under inches of dust.

Soft top down unless it's raining - that's the law in our house anyway :-)


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Re: 1982 GTC project gumtree

Post by ard126k » Fri Jun 16, 2017 10:11 pm

Yes it's a big thing to store isn't it? I've actually already hoisted it up off the car so I didn't have to bend down so much inside!


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Re: 1982 GTC project gumtree

Post by ard126k » Wed Jun 28, 2017 10:11 am

Done it again! Spent a couple of days worrying that it wouldn't run more than 5 mins without overheating. Finally remembered that the alternator was off, so no drive belt for the water pump.... I do know what I'm doing, honest!!!! :oops:


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Re: 1982 GTC project gumtree

Post by ard126k » Tue Jul 04, 2017 12:17 am

Getting better. Only took about 30 seconds to work out that I couldn't get the brake caliper past the steering arm because the PO had put the caliper mounting plates on the wrong sides.

Yes I'm on to the brakes now. I thought that by 1982 everyone was pretty much standardised on metric fittings but it appears that all mine - calipers, m/cyl, etc are all still imperial. Would that be right?

I think I read somewhere that it's OK to connect the front flexi pipes direct to the caliper and so do away with the short rigid pipe that loops around between them. Has anyone done this?


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Re: 1982 GTC project gumtree

Post by Roger Pennington » Tue Jul 04, 2017 12:54 pm

ard126k wrote: Yes I'm on to the brakes now. I thought that by 1982 everyone was pretty much standardised on metric fittings but it appears that all mine - calipers, m/cyl, etc are all still imperial. Would that be right?
That sounds a bit odd - I think all the front pipe unions are metric, as are the caliper fixing bolts (M12). From memory though, I think the metric and imperial union threads are very close, and one will screw part way into the other.....

I think I read somewhere that it's OK to connect the front flexi pipes direct to the caliper and so do away with the short rigid pipe that loops around between them. Has anyone done this?
If I was going to do this I think I'd want to check carefully that the flexi pipe was long enough at extremes of lock, and wasn't going to foul on anything. Reliant presumably used the solid pipe for a reason (as it must have cost more to do?). However, I *think* I may have read of some people who've done without them?


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Re: 1982 GTC project gumtree

Post by philhoward » Tue Jul 04, 2017 2:43 pm

IIRC a 3/8" UNF (Imperial) male union will thread into an M10 (Metric) port/female union to a degree, but won't last or seal properly and may strip the threads on one or both parts.


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Re: 1982 GTC project gumtree

Post by ard126k » Sun Jul 09, 2017 9:16 pm

I think I've got it clear now, after borrowing a pair of metric pipe nuts from the local garage. What it comes down to is that the M10x1 thread is fractionally wider than the 3/8 UNF, so the male UNF will go into the metric but the threads don't engage very deeply so they can wobble about until the very last turn. You can't see this on the car as the pipe holds the nut from wobbling. That was what was confusing me.
On the other hand the male metric nut only goes into the UNF female about one turn then jams so it's not possible to get that wrong.
My concern about using the flexi straight into the caliper is that normally you have a softer copper pipe being forced against a harder iron component so the copper is slightly deformed to form the seal. If you put the steel end of a flexi pipe into the component the deformation won't happen so the seal may not be as good. So I'm going to stick by the original plan.


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Re: 1982 GTC project gumtree

Post by ronnie » Sun Jul 09, 2017 9:54 pm

Metric on the master cylinder and also the brake bias valve.
Found that out this afternoon after I had another go at bleeding my own brakes.



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Re: 1982 GTC project gumtree

Post by efi_sprintgte » Mon Jul 10, 2017 5:51 am

ard126k wrote:
I think I read somewhere that it's OK to connect the front flexi pipes direct to the caliper and so do away with the short rigid pipe that loops around between them. Has anyone done this?


I've done this a few times, hose straight from calliper to the brake pipe. Had to weld a new tab on the other side of the suspension towers to do it. Only really viable at the point of changing brake pipes.



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