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351 re-build FINALLY underway

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gmars70970 View Drop Down
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    Posted: February-11-2018 at 8:29am
After working reduced hours for nearly 2 years i've started a new job so the full refurbishment of my 1980 Ski Nautique is back in full swing again. 351w is underway !!!



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Post Options Post Options   Thanks (0) Thanks(0)   Quote Sacwake1 Quote  Post ReplyReply Direct Link To This Post Posted: February-11-2018 at 6:01pm
Nice! I have a 1980 as well. Just ordered an ATK remanufactured 351. I'm nervous I got the wrong rotation. Is your 1980 reverse rotation?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote connorssons Quote  Post ReplyReply Direct Link To This Post Posted: February-12-2018 at 10:20am
all ski ,s are reverse rotation.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Sacwake1 Quote  Post ReplyReply Direct Link To This Post Posted: February-12-2018 at 12:24pm
Thanks Connorssons. Sorry Gmars didn't mean to hijack your thread! Heads and intake manifold look great! What did you use to clean them up? Also, what kind of paint did you use? Good luck with the build!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gt40KS Quote  Post ReplyReply Direct Link To This Post Posted: February-13-2018 at 12:54am
Originally posted by gmars70970 gmars70970 wrote:

.... so the full refurbishment of my 1980 Ski Nautique is back in full swing again. 351w is underway !!!


Looks like you have a good start! Are the heads recently milled or did you start this process a while ago?

Scotland. Hmmm.... always wondered what the ski season was like in Scotland/ UK area
JCCI
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Gary S View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary S Quote  Post ReplyReply Direct Link To This Post Posted: February-13-2018 at 10:38am
Originally posted by gt40KS gt40KS wrote:


Scotland. Hmmm.... always wondered what the ski season was like in Scotland/ UK area


About the same as Three Lakes Wisconsin
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gmars70970 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gmars70970 Quote  Post ReplyReply Direct Link To This Post Posted: February-14-2018 at 8:39am
Sorry for the delay in replying had internet "issues" !

Just used a degreaser and and wire brush head on my drill to clean up the outside of the heads. I've used a can of Simoniz VHT, I'll give it all another few coats when its back together.

As for the ski season in scotland, im pretty sure it was a Wednesday last year!




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slmskrs View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote slmskrs Quote  Post ReplyReply Direct Link To This Post Posted: February-26-2018 at 4:16am
Slightly off topic, but what can we expect from the 351 with oil changes every 50hrs before the whole engine needs a rebuild? I have a '96 GT40 with nearly 1,700hrs on it. Still running strong with little oil burn, and I'm wondering how long for a complete block rebuild/replacement. I replaced the heads about 300-350hrs ago, but nothing to the block or lower end. Can I expect 3,000? 2,500? Or am I looking at a rebuild in the next couple of years?

Thanks,

Gordon
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MrMcD Quote  Post ReplyReply Direct Link To This Post Posted: February-26-2018 at 4:35am
Depends nearly 100% on your maintenance and keeping it running good.
If a plug fouls out, fix it right away don't run it till you wash down a cylinder.
Cars with fuel injection can easily go 250,000 miles now without rebuild.
Carbureted cars were lucky to go past 100,000. The FI makes a big difference in life if it is working well. Keep clean oil in it and enjoy it.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote slmskrs Quote  Post ReplyReply Direct Link To This Post Posted: March-02-2018 at 12:59pm
Thanks MrMcD. Synthetic oils since day-one. I had a car that went 247k; would have made it to 300k but the lower timing tensioner went out for the second time (first time was under warranty) and the cost to pull the engine to replace it was more than the car was worth. That said, since our boats are always going uphill non-stop unlike a car that coasts and goes on level ground, they work much harder. I've always equated 50 hours to be about 2,000 miles, so my engine is currently at the equivalent of 68,000 miles. Will it run to 100k/2,000hrs? Or more? (hopefully more). Anyway, I'd like to hear what folks have gotten, so I may post this as a new thread so a wider audience will see it.

Thanks again for the response.

Gordon
Gordon '97 Ski Nautique, GT40
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MrMcD Quote  Post ReplyReply Direct Link To This Post Posted: March-03-2018 at 3:28pm
I had a 78 Nautique, I bought it with 600 hours in 1980 so it was used hard for a couple years prior to me and I do not know that history but around 1000 hours I had to replace the heads. It was running like brand new when I sold it at 1,600 hours.
I have read of guys on this forum with 3,000 hours so it can happen with good maintenance.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gt40KS Quote  Post ReplyReply Direct Link To This Post Posted: March-19-2018 at 7:23pm
Updates Graeme? How is the rebuild going.... still having a hard time acquiring parts?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gmars70970 Quote  Post ReplyReply Direct Link To This Post Posted: March-21-2018 at 7:11pm
Couldnt source an oil pan anywhere. So managed to get my old one repaired and i'll get it fitted this weekend. Cant work out how to upload pics from my phone to the site but i'll try to post a pic from laptop tomorrow
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gt40KS Quote  Post ReplyReply Direct Link To This Post Posted: March-21-2018 at 10:47pm
Yeah, site doesn't like phones and evidently ipads/ tablets. Laptops/ desktops only unfortunately.
There are various parts on the older Nautiques that are fairly hard to come by, even in the states so I can imagine what it may be in Scotland. I myself have recently been looking for a replacement timing cover, but the part remains a bit illusive - at any reasonable price anyway.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary S Quote  Post ReplyReply Direct Link To This Post Posted: March-21-2018 at 11:24pm
Joe-What could be wrong with your cover?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gt40KS Quote  Post ReplyReply Direct Link To This Post Posted: March-22-2018 at 2:48am
Originally posted by Gary S Gary S wrote:

Joe-What could be wrong with your cover?


Those top 2 bolts behind the water pump - one rusted solid, the other rounded over so I had to use a cut-off and got into the mounting surface a bit. It may still work, just doesn't look pretty and with the uneven surface I'm not sure how well it might stay torqued. So I thought if I could pick up a good used one at a decent price it would be worth swapping.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gmars70970 Quote  Post ReplyReply Direct Link To This Post Posted: March-22-2018 at 8:24am
Much cheaper than a new oil pan, £40 for the repair !!





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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: March-22-2018 at 8:33am
Graeme,
There's nothing wrong with a repair. Looks good and yes, you saved some $$$.


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Keep it original, Pete
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MourningWood Quote  Post ReplyReply Direct Link To This Post Posted: March-22-2018 at 11:49am
Repair looks like it should be fine. Good work.

Maybe we could stop stepping all over this gentleman's thread......
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gt40KS Quote  Post ReplyReply Direct Link To This Post Posted: March-22-2018 at 11:50am
Nice looking welds and yes, much less than a used one would have been, if you could even source one.
Keep the pictures coming, we love to see the progress
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gmars70970 Quote  Post ReplyReply Direct Link To This Post Posted: March-25-2018 at 3:45pm
Bottom end rebuilt today, hopefully get the top end completed next weekend.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote gt40KS Quote  Post ReplyReply Direct Link To This Post Posted: March-25-2018 at 3:56pm
Looks great! Progress feels good, yes?   

Raining and cold in Kansas today., feels much like what I imagine Scotland is like right now. So naturally, I'm in the garage working on the boat. Well, intermitent breaks to warm up ...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gmars70970 Quote  Post ReplyReply Direct Link To This Post Posted: March-25-2018 at 4:05pm
100% !!!
Been ages since i'd seen any progress.

New timing chain and sprockets fitted today too.


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