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Hi folks, I'm at the stage of working out what I'll need if I decide to rebuild the motor in my Hunter. If anyone has Rootes/Hunter rebuild experience (or links to a rebuild guide), please let me know  Parts list so far : check bores then decide if it needs new rings £20 or rebore + new pistons £300 ! main bearings £25 big end bearings £25 oil pump £35 timing chain + tensioner kit £30 full engine gasket set £40 Total parts near £200 if the bores are ok, or £500 if pistons are needed  + engineering costs ( rebore + mains + big ends ) Parts not yet confirmed : big end bolts / main bearing cap bolts ? engineering to fix rocker arms (to remove groove worn by valve stems) Expected problems : How to remove / refit the crank pulley bolt (180ft/lb torque ) remembering to time the oil pump / distibutor before refitting the sump Random Rootes photos    All advice or suggestions welcome !  |
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fad
Posted a lot
Posts: 1,781
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Just pray you never have to deal with this...  |
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stealthstylz
Club Retro Rides Member
Posts: 14,855
Club RR Member Number: 174
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Oct 24, 2017 16:55:49 GMT
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You never know what it needs till you pull it to bits. What you've listed is the basics, but then you've got cam/pulleys/gears etc that can be heavily worn. I'd try and find new rockers rather than machining yours once you're through the case hardening they don't last long.
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Oct 25, 2017 19:05:56 GMT
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Yeh, budget then double it :-)
You won't need mains bolts but big ends is always a good investment imo. Expecially if you want a bit more power out of it at some point. That said it's not a nessacity on these old engines. Only on later motors with stretch bolts.
Crank may need regrind. Cam almost certainly past it. They always look ok but take a pummelling.
Head work? Valves? Unleaded seats? Guides worn? You van spend alot of money if your unlucky
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Oct 25, 2017 20:54:50 GMT
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I wonder of its worth you pulling it apart then taking it to a machine shop so they can do all the measuring/assessing to make sure you do not over look or make a ill judgement ?
If thats possible it might be a few quid well spent later down the line .
Just a thought .
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Thanks everyone, the ideas are all appreciated ! I'm expecting to do what I can myself (stripping etc) and use my local machine shop for the rest. Many years ago I gave them 2 scrap (blown bottom end) Lancia engines and left them to pick the best bits - fix anything else - and I got a good engine back. I could give them this engine but I'd like to do what I can and learn along the way The head was overhauled 2 years ago when I burst a hose and it overheated, it should be fine to use that as-is (but I know the grooved rocker arms are not right) I have a few options but not decided yet, I like the car but I can't justify spending several hundred fixing the engine, if I can fix the knocking (big end ?) and low compression (re-ring the pistons / rebore?) I'll be happy. Having nowhere to work, and not wanting the car off road for weeks, makes it even more "fun"  |
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djefk
Part of things
Posts: 844
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Oct 26, 2017 19:49:40 GMT
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I think from the costs you've listed alone you're 10000000% better off finding a good running used engine for £200-350 (or even slightly more, depending on provable provenance).
I know these lumps are now thin on the ground but there will be options out there if you're willing to travel.
You can then inspect / rebuild your original at your leisure (or not) and the car spends minimal time off the road.
Personally, I'd be then tempted to swap your newly refurb'd head onto the "new" engine for extra piece of mind (not to mention getting your money's worth from having that work done!)
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Last Edit: Oct 26, 2017 23:11:32 GMT by djefk
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