351w refurb |
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gmars70970
Senior Member Joined: November-06-2013 Location: Scotland Status: Offline Points: 235 |
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Posted: February-15-2017 at 7:52am |
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Totally understand advances in technology can give both power & reliability. What I should have said was budget lol..... if the standard parts are still in good working order then I'll re-use them. Getting prices today to get the engine block pressure tested & the shaft checked out. |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21171 |
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Stock is fine if it meets your needs, but do not confuse increased power with decreased reliability. Often times, superior quality, more efficient parts improve both.
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gmars70970
Senior Member Joined: November-06-2013 Location: Scotland Status: Offline Points: 235 |
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Yeh there's not an abundance of parts over here in Scotland. I'll stick to stock parts if possible, I'm happy with the power output & would prefer reliability.
Summer lasts about 3 days in Scotland, so the engine should last my lifetime lol |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21171 |
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His location changes a lot of those options... not much economical about rebuilding old American iron across the pond, I suspect.
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MrMcD
Grand Poobah Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3735 |
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The heads are off, very nice time to replace the stock heads with some GT40 heads for more power. Or look at local Craigslist adds for a set of AFR heads. I have seen several sets for around $1,000. The AFR will out perform the GT40 but may not be worth the extra money. I think the GT40 heads are worth 40 HP but others may have more accurate notes on this.
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21171 |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11061 |
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Ain't none in captivity either |
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gmars70970
Senior Member Joined: November-06-2013 Location: Scotland Status: Offline Points: 235 |
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I'll double check the hours tomorrow.
But since the previous owner never mentioned the new pistons being done i've no idea how many hours its ran since being worked on. It ran fine before I removed it, but since I had it out I thought it would be the ideal opportunity to freshen it up. As I said my dads the mechanic not me lol |
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tryathlete
Platinum Member Joined: April-19-2013 Location: Lake Villa, IL Status: Offline Points: 1797 |
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What are total engine hours?
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21171 |
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No such animal exists in the wild for a RH 351w.
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gmars70970
Senior Member Joined: November-06-2013 Location: Scotland Status: Offline Points: 235 |
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Ok thanks, anything else you'd defo replace when this far in? |
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tryathlete
Platinum Member Joined: April-19-2013 Location: Lake Villa, IL Status: Offline Points: 1797 |
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I'd put a set of rollers and a new roller cam if I had it apart.
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gmars70970
Senior Member Joined: November-06-2013 Location: Scotland Status: Offline Points: 235 |
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Thats the plan.
I'm not clued up on engines but my dads a retired mechanic and I work in engineering so between us we should be ok. Is there somewhere I can get the standard dimensions for the cams etc so I know if its been reground for when I'm buying shells etc |
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tryathlete
Platinum Member Joined: April-19-2013 Location: Lake Villa, IL Status: Offline Points: 1797 |
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I'd inspect the cylinder bores and crank and rod journals and can lobes (dimensional and appearance) and if. All ok, reassemble the thing.
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gmars70970
Senior Member Joined: November-06-2013 Location: Scotland Status: Offline Points: 235 |
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I removed the engine to do the stringer repair.
Since I had the engine out I thought this would be the ideal time to replace gaskets, bearings etc. I didn't know it had previously been worked on until I started to strip it. |
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MrMcD
Grand Poobah Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3735 |
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The block is .030 oversize so it has been rebuilt before.
Why is this engine coming apart? |
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gmars70970
Senior Member Joined: November-06-2013 Location: Scotland Status: Offline Points: 235 |
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Yes that the way they came out, the picture was taken mid strip down so nothing had been cleaned yet.
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MrMcD
Grand Poobah Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3735 |
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If they came out looking like the picture they are very low hour pistons.
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gmars70970
Senior Member Joined: November-06-2013 Location: Scotland Status: Offline Points: 235 |
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The pistons are stamped 0.030"
The previous owner never mentioned new pistons so I was surprised to find them when I stripped it down. Hopefully that's a cost saving as it's already had new pistons. |
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MrMcD
Grand Poobah Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3735 |
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The picture is not complete, can't see the piston skirt or rings but the picture does look like a new piston. You can't hide the wear on a piston skirt if they are used.
Also used pistons would show oil burned on the inside of the piston head above the piston pin. If the pistons are oversize it will be stamped on the piston head. IE: 20, 30, 40 or if metric it will say: 50mm 75mm or 100mm I don't think your old 351 would still be standard bore. |
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gmars70970
Senior Member Joined: November-06-2013 Location: Scotland Status: Offline Points: 235 |
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Well my plan on replacing the head gasket went a bit further than originally planned.
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gmars70970
Senior Member Joined: November-06-2013 Location: Scotland Status: Offline Points: 235 |
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Do these look like new pistons to anybody else?
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gmars70970
Senior Member Joined: November-06-2013 Location: Scotland Status: Offline Points: 235 |
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Thanks for that.
Just done a search and I can get Fel-pro gaskets over here. I'll compare prices between those and getting OEM parts shipped over. Thanks Graeme |
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LaurelLakeSkier
Senior Member Joined: February-12-2007 Location: Wisconsin Status: Offline Points: 485 |
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I've had good success using Fel-Pro gaskets on my 351 as well......
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The world is full of youth—what we need is a fountain of smart!
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Graeme I don't know what you have available to you but in fresh water I used all Fel-Pro gaskets for almost 20 years with no problems. When I changed the heads to gt40p's I bought PCM head gaskets just to be sure. I bought all the parts before doing the change,so I did not know how the Fel-Pro's were going to look.
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gmars70970
Senior Member Joined: November-06-2013 Location: Scotland Status: Offline Points: 235 |
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Starting to make some progress now on the old 351w from my 1980 Ski Nautique.
Whats a recommended make of gaskets etc. |
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