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Re: Grey Motor teardown
Posted: Wed Aug 11, 2021 10:50 am
by Orange Betty
Advice from the machine shop is:
- cylinders need rebore - 40" for available pistons
- crank needs grinding 30" mains and 40" big end (no doubt due to spun bearings)
- close and hone rods
- shave block deck and head surface
Camshaft, head, valves etc otherwise ok.
$4,240 for everything (inclusive of pistons, rings bearings...). Does that sound reasonable?
Cheers
Dave
Re: Grey Motor teardown
Posted: Wed Aug 11, 2021 11:00 am
by Harv
Feels about right. They are not cheap anymore. Can save a few pennies doing the assembly yourself, though that comes with all the normal warranty risk.
Cheers,
Harv
Re: Grey Motor teardown
Posted: Wed Aug 11, 2021 2:07 pm
by Errol62
For a grey you can expect up to $5k.
FB ute driver, EK van project
Re: Grey Motor teardown
Posted: Wed Aug 11, 2021 2:28 pm
by Blacky
Seems a little high for bottom end only ?
Re: Grey Motor teardown
Posted: Wed Aug 11, 2021 5:56 pm
by Orange Betty
Thanks all. So it appears to be in the ballpark. There are a few things I need to check but will probably bite the bullet and get the work done.
Cheers
Dave
Re: Grey Motor teardown
Posted: Wed Aug 11, 2021 9:15 pm
by kermit17
Hey Dave. A word of warning, if you are reassembling the engine yourself don't use the Permaseal rope rear main seal that comes in the engine reconditioning set. They are rubbish!!! I have recently recond my grey motor and I found that the seal that is provided in the set when installed crushes too easily and will quickly leak oil out the rear of the engine. I found a rope seal from a V8 Oldsmobile or Plymouth that worked a lot better. It is a square shaped seal approximately 8.5 X 8.5mm (see photos). The long fury looking seal is the type provided in the set, the 2 smaller pieces are the cut off ends of the seal I installed. I also put center punch marks in the seal groove to make sure the seal does not spin. This is just my 2 cents worth as an ex motor mechanic for what its worth. Cheers Peter
Re: Grey Motor teardown
Posted: Wed Aug 11, 2021 10:14 pm
by FbSTDwagon
Good thread!
I’m about to start the build of a hotty grey motor myself.
Can’t wait!
Re: Grey Motor teardown
Posted: Thu Aug 12, 2021 6:27 am
by Orange Betty
kermit17 wrote: Wed Aug 11, 2021 9:15 pm
Hey Dave. A word of warning, if you are reassembling the engine yourself don't use the Permaseal rope rear main seal that comes in the engine reconditioning set. They are rubbish!!! I have recently recond my grey motor and I found that the seal that is provided in the set when installed crushes too easily and will quickly leak oil out the rear of the engine. I found a rope seal from a V8 Oldsmobile or Plymouth that worked a lot better. It is a square shaped seal approximately 8.5 X 8.5mm (see photos). The long fury looking seal is the type provided in the set, the 2 smaller pieces are the cut off ends of the seal I installed. I also put center punch marks in the seal groove to make sure the seal does not spin. This is just my 2 cents worth as an ex motor mechanic for what its worth. Cheers Peter
Thanks Peter, good advice. I have heard horror stories about the rope rear main seal!
Dave
Re: Grey Motor teardown
Posted: Thu Aug 12, 2021 10:47 am
by ardiesse
Peter,
Would the better quality rear main bearing oil seal be the Graphtite one?
Rob
Re: Grey Motor teardown
Posted: Thu Aug 12, 2021 9:51 pm
by kermit17
I believe that both rope seals are impregnated with graphite. Its more about the structure of the fibers that makes them different. Mr Gasket in the US seem to have a wide variety of seals similar to the ones I used but the ones I used were leftover stock from another job so not sure what make or model. If you contact them direct and ask for 2 seals approximately 8.5mm squared x 130mm long they should have something that will fit. Hope this helps. Cheers Peter