The Racy Red Bakery Truck.

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Post by CNHSS1 » Mon Oct 15, 2018 8:19 pm

Nice detective work Brian 8)


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Post by b.c.flat hat » Wed Oct 17, 2018 1:13 pm

Found the illegal smokers!
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Post by philhoward » Wed Oct 17, 2018 1:25 pm

I think you got your money’s worth out of those!


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Post by b.c.flat hat » Thu Nov 15, 2018 5:28 pm

So nearly a month later, I got a recommendation from my pal down the road for M J Engineering, had a chat and whipped both heads off and away for new guides, seat re-cutting etc. Got them back Saturday, finished all the cleaning on Tuesday, refitted everything late last night.
This morning I set the timing, filled the coolant and oil and fired it up. What a racket! Same "big-end death rattle" and a humungious exhaust blow from the drivers side, coming from inside the three primary headers! Bleddy car!
Let it warm up at low revs, no difference. The rattle seems to come from the rear cyl, passenger side so had that rocker cover off to see if a pushrod guide had broken, no luck, so I reckon it's a broken piston.
The plan for tamara is take the heads off, have a good look at the pistons, then probably take the bleddy engine out and use the one out of the Coupe to get us mobile again, at least the heads are ok. Oh and I've "scimitar back-ache" too.



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Post by efi_sprintgte » Thu Nov 15, 2018 5:40 pm

I havnt read all the way back through but wasn’t there a low oil pressure issue in the past too?

Does seem that unfortunately the only real solution will be full strip down.

At least you have easy access to a known spare!

Good luck mate


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Post by Nick » Thu Nov 15, 2018 5:40 pm

Might be worth getting an endoscope to have a look. Mine was £10 ish on e bay, and connects to my phone


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Post by b.c.flat hat » Sun Nov 25, 2018 11:13 am

Mega shunt done, GTE back inside and every thing stripped orf! No marks on the inside of the rocker cover from an over-active valvegear, no broken pushrod guide but piston no. 6 has a small melt on the periphery about an inch long exposing the top ring.
Mucho faffing to get the engine out as my crane legs ain't long enough so attacked it from the side and eased the car backwards to free the clutch.
Cleaning up the old Coupe engine to get mobile again, it looks ok but needs must, it ran alright last time out.



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Post by b.c.flat hat » Fri Nov 30, 2018 11:58 am

Found the bleddy problem!
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Post by BigBobPilot » Fri Nov 30, 2018 12:19 pm

It looks like you've been running with the boost turned up to 11!

As it's no. 6 it's further away from the carb. Was there any evidence of an inlet leak tjat could have leaned out just the single cylinder?


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Post by b.c.flat hat » Fri Nov 30, 2018 12:33 pm

It's just this one, there's evidence of mechanical particles from summut extra initiating the damage. I think it's yet another illustration of the cost in time and cash that those wee screws in the carb insulator do. There's got to be a way of preventing stuff coming loose or fracturing due to pulsing in the inlet manifold. I thought the gauze cones idea ok but it seems even they fracture after a while.



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Post by CNHSS1 » Fri Nov 30, 2018 1:24 pm

Lightened pistons in Roadgoing?? Not sure that's allowed BC :lol: :lol:


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Post by scimjim » Fri Nov 30, 2018 2:08 pm

That looks more like a problem with the casting than impact damage to me?


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Post by b.c.flat hat » Fri Nov 30, 2018 3:01 pm

CNHSS1 wrote:
Fri Nov 30, 2018 1:24 pm
Lightened pistons in Roadgoing?? Not sure that's allowed BC :lol: :lol:
Ooo! Yer rascal! Yer 'aven't sin 'em!
scimjim wrote:
Fri Nov 30, 2018 2:08 pm
That looks more like a problem with the casting than impact damage to me?
Does a bit but not shown is a piece of metal about 1/8" by 1/4", very thin, stuck between the top ring and cyl. It washed off before the pic was taken. I think it initiated the local melting.

Anyhoo I searched the boxes o' treasure and found two sets o' pistons, one +60 and one set o' standard, same as fitted. They ain't the same though! Old has straight sides to the combustion chamber, other has big chamfer on top.
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Post by scimjim » Fri Nov 30, 2018 3:56 pm

I've got some spares I think - what size/shape do you need BC? is the block going to need a bore or sleeve? I have a couple of blocks that will probably need a hone or good clean if you need.


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SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
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Post by Coupe Racing » Fri Nov 30, 2018 4:25 pm

I have a set too


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