Bent valves (all 8)

imported post

http://cgi.ebay.com/81-83-Honda-GL1100-Goldwing-GL-1100-CYLINDER-HEADS_W0QQitemZ5597740413QQcategoryZ31411QQssPageNameZWD1VQQrdZ1QQcmdZViewItem



try this

imported post

not affiliated with the seller. that would be the cheapest way. used heads, when you get them, might want to hand lap the valves.

imported post

With all that work and the price of all the gasket kits, it may be best to swap a motor if you can find one. A lot less work. At least that is what I did with my 1100. Then again I was over 400,000klm. I found a motor and had my wrench install it and it worked out to about $1,000.

Kyle

imported post

Kyle wrote:

With all that work and the price of all the gasket kits, it may be best to swap a motor if you can find one. A lot less work. At least that is what I did with my 1100. Then again I was over 400,000klm. I found a motor and had my wrench install it and it worked out to about $1,000.

Kyle

Click to expand...

I agree !!!!!!!!!!!!!:baffled:

imported post

I'd go with replacing the heads with used. $1000 is a bit much to me and I've seen heads pretty cheap on eBay. It would probably be cheaper than trying to have a shop repair the heads you have. Why not contact some of the salvage yards listed on the forum?

If you decide to replace the engine, they can be found fairly cheaply. I saw a GL1100 engine on ebay that had no bids at a starting price of $399. If you pull your old engine you'll pretty well know how install a replacement. That might be an okay way to go, then you could sell off parts of your old engine to reduce the cost. The one I saw came with a starter so there's about 90-100 dollars you could recover.

imported post

Heads?... Block?... It's an ipsy / dipsy question.. Usually, if the valves are bent, the probability of damaged pistons is high... I realize you don't always see the damage to the top of the pistons, but if you think about it, it takes a lot of force to bend the valves. Don't forget,,, the pistons are aluminum and the valves are steel.. After having spent the $'s for replacement heads, you may find the block is damaged and now you're out more money...

Advice.. Super clean the piston heads and inspect them with a magnifying glass for cracks.. Very small cracks... Especially where the valves hit... If you see ANYTHING abnormal about that area,,, Replace the engine... It's cheaper in the long run.

imported post

I'd say the pistons are fine. I've seen quite a few Wing pistons walloped by valves and they are as tough as car engine pistons. The only time I seen a piston damaged was on a GL1200 when a valve head broke off and took a piece out of a piston. You should remove the bent valves to assess ifany valve guides broke as well because this does happen sometimes.
A set of new valves will probably cost teh same as the used heads, so its a tough call. New valve would be nice as you can lap them in and they will probably last for years. You could also replace the valve stem seals while you are there in both cases as this will stop the usual cold-start smoking.

imported post

If all eight valves are bent you can bet you have at least onepiston that is crack or damaged, Renegadeis right. If you need some standard pistonslet me know, I have a good set.I bought some heads off ebay and was happy with the price but the seats werepitted, so checkany heads you buy and take them to a machine shop and have a goodthree angled valve job done to them, don't justtry to lap the seats in. If you choose to buy a whole motor off Ebay, buyer Beware, this is just my thoughts, I'm rebuilding a 81 1100 right now and the parts are are hard to find. The intake valves can be had at around $12 but the exhausts are high dollar. Let me know if I can help, Jimmy

imported post

I Wouldn't worry too much about the piston. Clean them and take a look at them. If you see no cracks on the dome you should be fine.The cambelts on my 83 broke at 104,000 and left visible indentations on the piston domes and bent all the valves. I had to replace a leaky headgasket at 160,000 miles and saw no scoring in the pistonwalls and when I sold the bike with 207,000 miles on it I still had 135PSI compression and used about 1 quart of oil every 4,000 ,miles.

imported post

Lone Star wrote:

I wouldn't bid on these heads.Look atthe 2nd to last picture, this head has been overheated. Notice that all the carbon deposits have been washed away in one of the combustion chambers by a coolant leak into the cylinder. They are likely cracked or warped as well, but they definitley blew the head gasket on that side.

I also would take a chance on doing the heads. I'd be very suprised if those valves did any damage to anything. Valve stems bend very easily, they didn't stand a chance against those pistons.

Good luck

Keith

Click to expand...

I'd agree with you, the exhaust valves look like they've been awfully hot, I'd bet this engine has been run pretty lean for a good long time.

imported post

that was just an example, heads are available cheaper than the valves.

imported post

heres another,http://cgi.ebay.com/ebaymotors/Honda-GoldWing-GL1100-GL-1100-Complete-Heads-w-Cams-80_W0QQcmdZViewItemQQcategoryZ35595QQitemZ4578820850QQrdZ1QQsspagenameZWDVW

imported post

Gambler wrote:

that was just an example, heads are available cheaper than the valves.

Click to expand...

I understand, I just wanted to point that out so that no one would end up with a bad set of heads. I just have an eye for this kinda stuff after working on cars for almost 20 years its second nature.

Keith

imported post

I'd still go with my own heads once I knew the history and they hadn't been roasted in the past. Going the cheapest way and buying used heads isn't always the wisest move.

imported post

The intake valves newcan be foundfor around $12, the exhaust around $35. I'm about to invest in a new set for my heads and you are welcome to my oldones, they are in great shape. The only reason I'm replacing them is that I've had the heads ported and have bought new guides. Coot out.

imported post

I'd prefer to keep my own heads as well. I've had bad experience with cars, buying heads that turned out to have been roasted, which then overheated on me even with thermostat removed. You can be lucky with heads, or unlucky.....

imported post

I'd go with keeping the existing heads, once I knew they were good and I intended to hold onto the bike. If I was just fixing it up to sell on, then I would probably chance used heads.