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Rocker shaft p/n 60401 and bushing 60398 are common parts used on O-235-C1, O-290-D, D2, D2C, O-360-A, IO-360-G, HIO-360-B O-540-A and IO-540-C/J). Many sources.
Valve spring retainer p/n 60009. Multiple engines, many sources. Aircraft Spruce has them.
Spruce also has O-435-A cylinder base gaskets and valve cover gaskets. Same set as used on O-435-C/C1 and O-290 and probably other engines.
Aircraft Specialties has the 66531 exhaust valves also used on the O-290-D.
The 66429 intake valve = 60037 = LW-11901 same as O-235 and O-290-D available from Superior Air Parts. There’s a set of 4 NOS on eBay for $298.
I sent you a private email about rings. Send me an email for a copy of the O-435 parts catalog if you don’t have one.
JG
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Hi John,
What rings do you need? Steel bore or Chrome (or some plating)? Are they oversized or Std bore size?
The exhaust valves # is Lycoming LW-19034 or Superior SL -17235 or SL -19034 I recommend not using the original EXh valve # 66081 or 66531 as I understand that these are 1200 hr limit valves.
Cylinder gasket set is Superior # SL12032-SC ( S C is) single cylinder.
Give me a call on Wed or Email me directly ( I tried the email I had for you on file and it kicked back to me)
Sam Taber
tabair@centurytel.net -
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Guys, it seems never ending. Finally got the cylinders back to the rebuild shop from the chroming. Covid has put everyone behind schedule. Now the rebuild shop is looking to replace the valve seats. Is there a crossover part number for the O-435-1 valve seat? I would think it would be a common part for other engines, but that would be too simple. Any help to get me back in the air would be appreciated.
Thanks,
John
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The saga continues. Got valve seats but they are smaller than the ones installed. I see in the parts manual there are 2 different part numbers for both intake and exhaust seats. Is the difference the outer diameter? The new seats are 2.086 and the old are 2.090. One part # is for the -1 and the other is for the -11. Any guidance or source would be appreciated.
John
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John,
Yes, there are different part numbers for the intake and exhaust valve seats. Apparently you haven’t eyeballed the valves yourself because they are noticeably different in size. From the -11 parts catalog the Exhaust Valve Seat is p/n 66527. The Intake Valve Seat is p/n 66528. Neither of these parts are currently made. This is the same valve seat set as used on the Lycoming O-290. On that engine, the exhaust valve was superceded by 72058 and I think the intake was superceded by the 72057, but I can’t seem to find my cross-reference data at the moment.
If memory serves, these later seats are also common with the Lyc , 320, 360, and 540 [at least on some versions], so you should be able to locate the parts easily enough. However, don’t take my word for it. Do your research and double-check the cross-references. When purchasing, also be aware that they were made in oversizes versions as well as standard. Gibson Aviation probably has them. Univair or Preferred Air Parts may have them too. Also be aware that when new seats are installed the valve guides should be replaced too, per instructions in the OH manual.
Good luck,
JG
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p.s. To clarify on the O-290, I meant the superceded valve seat numbers, not valves. Also, on the O-435-1 the original valve seat part numbers were 60645 intake and 60337 exhaust. I wasn’t aware they might be sized differently from the -11 valve seats. That might have been the case with the early cylinder heads, p/n 65394 that were superceded by p/n 65756. These numbers should be cast into the heads, so for future reference I’m curious which heads are on your cylinders.
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