Bronze Valve Guides

Engine, Transmission and related drivetrain.
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abisel
Posts: 231
Joined: 29 May 2014 14:30
Location: St. Charles, Missouri

Bronze Valve Guides

Post by abisel »

I have been searching the web for a source of bronze valve guides for my U60/U67 head.
I have found these:
http://www.kameariusa.com/l6-bronze-valve-guides/
but that price is crazy. $54 each is a bit much.

Also, looking for steel valve seats to replace the bronze seats. Maybe new valves too.

Ferrea maybe: http://www.ferrea.com/
SI maybe: http://www.sivalves.com/

Please help
Chickenman
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Joined: 06 Sep 2010 15:10
Location: Coquitlam

Re: Bronze Valve Guides

Post by Chickenman »

Kameariusa prices are insane.

You should be able to source Bronze valve guides from any reputable machine shop. A good machinist should have a cross reference catalog and be able to source something for you. Nothing at all wrong with Cast iron guides either. Either factory or good aftermarket brands.

Edit: Serdi is a huge supplier for Valve Train parts. Here is a link to their guide for Silicon Bronze guides. Serdi International is based in the UK, but Machine shops worldwide use their equipment and parts . Here is a link to their PDF sizing catalog for Silicone bronze valve guides. Part number B212 is for Datsun 280Z and gives you sizing. 8.0 mm I.D, 12.04 mm O.D. and 58.80 mm Length :

https://www.google.ca/url?sa=t&rct=j&q= ... GU&cad=rja

Steel valve seats should be able to be sourced from any reputable Machine shop.
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abisel
Posts: 231
Joined: 29 May 2014 14:30
Location: St. Charles, Missouri

Re: Bronze Valve Guides

Post by abisel »

I went ahead and purchased SS 43/35 mm valves from SI Valves along with MagBronze guides and Viton seals.
The U60 head it at the machine shop getting :
New steel seats for the new valves. This head dropped a bronze intake valve seat.
New bronze guides.
New stock valve springs.
Mild WebCam with new rockers/lash pads/spring retainer
3-angle valve grind keeping in mind the installed valve spring height.
Porting the intake to match the gasket and Cannon manifold which will sport a pair of Weber 40DCOE.
Checking the head on the block and manifold sides for flatness and maybe a fine clean-up (less than 4 thousands).
Maybe even weld up the combustion chambers to a peanut configuration.

Should be a fun running engine even though the bottom end is stock with dished pistons.
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Byron510
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Re: Bronze Valve Guides

Post by Byron510 »

U60 heads are hard to come by. In all the years I have been playing with Datsun’s, I have seen only one.

However the U67 heads seem to be a bit famous for dropping seats. I have had this happen twice myself. Both times after simply parking the car after a good run. I too fixed them by installing stellite seats and larger 280ZX valves while I was at it.

No worries about the stock bottom end. If it's in good shape, she'll run pretty good with the set up you have mentioned. I'm personally itching to get a pair of side drafts onto a 510 again. I have 2 sets ready to go.

Byron
Love people and use things,
because the opposite never works.
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abisel
Posts: 231
Joined: 29 May 2014 14:30
Location: St. Charles, Missouri

Re: Bronze Valve Guides

Post by abisel »

Byron,

Speaking of side-drafts.

I got this pair of weber from a friend that had them sitting in his attic for years along with some other 510 spares. All dusty, some corrosion and needing a complete rebuild.

So.... a complete strip down, glass bead media blasting, removing the lead plugs, then poking and prodding the passages and found a couple that were completely blocked. After that, I cleaned them again and again to make sure no media left over from the glass beading followed by a bath in Alodine to give them an anti-corrosion coating. Then off to the internet to get spare parts and such.
Places like:
Summit racing
Pierce Manifold
Weber Performance in Australia
Dellorto in UK
and ebay.

It can get expensive.

BTW to replace the lead plugs, get some .177 lead pellets for your air rifle. Get the ones with a solid tip not hollow under the tip. Also get the round ball .177 lead pellets. Works great.
Chickenman
Posts: 536
Joined: 06 Sep 2010 15:10
Location: Coquitlam

Re: Bronze Valve Guides

Post by Chickenman »

For Lead plugs I buy the small fishing weight kits. Have hundreds of small lead plugs in various sizes in a handy dispensing case. Cheap too.
510rob
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Re: Bronze Valve Guides

Post by 510rob »

If you need a small quantity of lead balls, get someone who shoots shotguns to cut open an unfired round = more than you'll ever need...

http://www.hallowellco.com/shot_size_chart.htm
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abisel
Posts: 231
Joined: 29 May 2014 14:30
Location: St. Charles, Missouri

Re: Bronze Valve Guides

Post by abisel »

I looked into the shotgun shell shot but the size I needed was #3 and a couple #BB for the Weber carbs. I didn't want to try nickle plated or copper plated shot and couldn't find a box of plain lead #3 shotshells. I didn't need a 20 pound bag of the shot either, so I opted for the .177 pellets. Didn't look into the fishing weights because they were split and soft unlike the pellets which are harder. Just to make sure the lead plugs don't leak, I plan to put a dab of epoxy or aircraft polysulfide sealer on them once I get the carbs completed.
Chickenman
Posts: 536
Joined: 06 Sep 2010 15:10
Location: Coquitlam

Re: Bronze Valve Guides

Post by Chickenman »

I've never had an issue with using the split fishing weights, and I've used them for many years in various types of carbs and even in Valve bodies of Auto Trannies for plugging holes. Punch and compress them in with a small Pin punch and them add a dab of JB Weld. They'll never come out by themselves, yet you can still easily drill them out if you have to.
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abisel
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Joined: 29 May 2014 14:30
Location: St. Charles, Missouri

Re: Bronze Valve Guides

Post by abisel »

Looks like SI Industries can't fill an order properly.

I ordered 4 43mm intake valves and 4 35mm exhaust valves, 8 bronze guides and 8 Viton seals. I got 7 intake valves. 4 43mm and 3 44mm. And one exhaust valve at 35mm. The guides may be too small OD at 12.05mm. Once I remove the old guides, I suspect the bore will require an oversize guide to get the proper interference fit. Plus the guides are all exhaust guides with the back-cut on the ID at the exhaust port side. Looks like I may be returning everything to SI Industries.

Does anybody have any leads on quality parts? Proper valves and proper intake and exhaust guides. I have tried emailing Ermish and Rebello and even Nissan Motorsport with no replies from anyone.

Please help
Chickenman
Posts: 536
Joined: 06 Sep 2010 15:10
Location: Coquitlam

Re: Bronze Valve Guides

Post by Chickenman »

Maybe give Andy at Specialty Engineering a shout. He's one of the top Nissan experts in our area. He can probably supply everything.

http://www.specialtyengineering.ca/

For valves, have you tried ordering direct from Ferrera?

http://www.ferrea.com/Nissan-Engine-Valves/p34281
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abisel
Posts: 231
Joined: 29 May 2014 14:30
Location: St. Charles, Missouri

Re: Bronze Valve Guides

Post by abisel »

Overdue update:
I was able to get the valves exchanged with SI so I got the proper 43mm intakes and 35mm exhaust.

I believe I found some good bronze guides from Black Dragon Automotive:
http://www.blackdragonauto.com/icatalog ... px?Page=42
... and they even have the groove for the stock snap ring. Separate intake and exhaust guides. Not the same guide for both applications.

I took the old U60 head to a local hot rod machine shop http://stiegemeier.com/ and he did the work to replace the seats, guides, valves, port the intakes to match gasket/Cannon manifold and deck the upper and lower surfaces (.020 total removed). Now to assemble everything. Since only .020 material was removed, I don't think I need to shim the cam towers.

On another note, Bob at the machine shop wants to take an open chamber head and weld it up to a make a peanut chamber claiming a full point increase in compression ratio. I may take the damaged A87 (dropped seat) and have him do the work.
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