Trouble Driving in Valve Guides |
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usmcpmi
Member Sponsor Member Joined: 01 Mar. 2006 Location: Elgin,Texas Status: Offline Points: 878 |
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Sounds like he has the wrong guides...they probably make oversize guides too...JMHO....
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'48 CJ2A/192948
'15 Wrangler Rubicon Mark G. |
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jeeper50
Member Sponsor Member Joined: 01 Mar. 2008 Location: Spanish Fort AL Status: Offline Points: 2579 |
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This type driver could cause that to happen to guides. as you mentioned you purchased a driver.
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Belleview ol skool winch soon. '48 CJ2A 283 V8 sm 420 granny low, tera low D18, overdrive,lockers Texan at heart,Alabama by retirement |
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Ranger42
Member Joined: 06 Sep. 2011 Location: Gustavus Alaksa Status: Offline Points: 41 |
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USMCPMI, good idea to check the OD of the old and new guides. The old is between 0.6575 - 0.6560, the new ones are consistently 0.6580.
Here's the driver and the new guide Here's the driver on the new guide Here's the driver with 3/8 grade 8 washer I'm going to try heatlamp on the block, lube on the bore, and washer on the driver. |
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1950 CJ3A w/1945 MB Engine
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usmcpmi
Member Sponsor Member Joined: 01 Mar. 2006 Location: Elgin,Texas Status: Offline Points: 878 |
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.002 should be doable with the block warmed enough and the guides cold.
Good luck!
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'48 CJ2A/192948
'15 Wrangler Rubicon Mark G. |
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jeeper50
Member Sponsor Member Joined: 01 Mar. 2008 Location: Spanish Fort AL Status: Offline Points: 2579 |
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The washer should do the trick and spread the shock load of driving them over the whole top of the guide.
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Belleview ol skool winch soon. '48 CJ2A 283 V8 sm 420 granny low, tera low D18, overdrive,lockers Texan at heart,Alabama by retirement |
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JeepSaffer
Member Joined: 26 Sep. 2014 Location: South Africa Status: Offline Points: 1181 |
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.... and the lube won't hurt either
Let us know how you get on.
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1948 CJ2A #204853 in South Africa
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Ranger42
Member Joined: 06 Sep. 2011 Location: Gustavus Alaksa Status: Offline Points: 41 |
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Thanks for the tips. It's going well. I have 6 of the 8 guides in. The washer on the end of the driver worked well. Also, warming the block with the heat lamps, freezing the guides, and lubing the bores. I did break another exhaust guide - I probably struck the driver off center and put some horizontal force on it. So I'm waiting on the two more exhaust guides. I'm getting ready to measure the guide bores to seem if I need to ream them, then time to cut the valves seats. I'm thinking about trying to reverse the guide puller I made to press/draw the cylinder #4 Exhaust Guide in. Any thoughts?
Heatlamps warming the block - outside temp 25, block warm to the touch Broken exhaust valve guide |
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1950 CJ3A w/1945 MB Engine
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Vince
Member Sponsor Member Joined: 14 Nov. 2007 Location: UK Status: Offline Points: 332 |
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Just to say - best of luck with the last two, and - this is better than watching a TV thriller
I've been checking in over the last two days just to see if there was an update... Is it my age?
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usmcpmi
Member Sponsor Member Joined: 01 Mar. 2006 Location: Elgin,Texas Status: Offline Points: 878 |
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Question. We're the guides all left in the freezer until actually installed? Just wondering if they had any amount of time to warm up a little before trying to drive them in...although, the possibility of hitting them off square could have broken them sounds likely.
I have to commend your work ethic.... 25* outside would put me inside until spring! I guess we just have it easy way down here in Texas! |
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'48 CJ2A/192948
'15 Wrangler Rubicon Mark G. |
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Ranger42
Member Joined: 06 Sep. 2011 Location: Gustavus Alaksa Status: Offline Points: 41 |
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Yep, I left each one in the freezer until I was ready to drive that one in. They seemed to go well. The one I snapped off was my poor hammer control. Kind of funny how it broke clean off. Regarding the work at 25 degrees F. I've gotten used to it. I used to live in Virginia and when I did Mid-Atlantic heat and humidity (90 F with 90% humidity) had its drawbacks too.
I'm hoping to cut the valve seats tomorrow, but I need to measure the guide bores and see if I have the right clearance for the valve stems. I have a sneaking suspicion that I'll need to ream them. I'll probably start a new topic about that. Thanks again for all the ideas and insights.
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1950 CJ3A w/1945 MB Engine
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usmcpmi
Member Sponsor Member Joined: 01 Mar. 2006 Location: Elgin,Texas Status: Offline Points: 878 |
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Ranger 42, do you have the tools to cut the seats already? I have the tooling if you need it.
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'48 CJ2A/192948
'15 Wrangler Rubicon Mark G. |
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Ranger42
Member Joined: 06 Sep. 2011 Location: Gustavus Alaksa Status: Offline Points: 41 |
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Thanks for asking. I have the Neway 234: 45 deg - 30 deg cutter and pilot. When I began this project I was just going to cut a straight 45 deg. seat per original manual direction, however I did start experimenting with cutting the cyl # 1 seat, and it was so out of round, to get it down and make it concentric the seat ends up being wider than the 3.2 mm spec. So I'm thinking I'll need the Neway 205 60 deg cutter too and cut a 3 angle seat to achieve the correct contact width on the 45 deg angle. I expect that at least one other seat will have this issue too.
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1950 CJ3A w/1945 MB Engine
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usmcpmi
Member Sponsor Member Joined: 01 Mar. 2006 Location: Elgin,Texas Status: Offline Points: 878 |
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Ok. I have the 30/60 cutter if you need it. I did the same thing on mine.
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'48 CJ2A/192948
'15 Wrangler Rubicon Mark G. |
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jeeper50
Member Sponsor Member Joined: 01 Mar. 2008 Location: Spanish Fort AL Status: Offline Points: 2579 |
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I ran a .375 reamer thru the two guides that the valve stem wouldn't drop in to when I did mine. take pics of the puller you fab up to share with others
Edited by jeeper50 - 29 Jan. 2019 at 12:17am |
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Belleview ol skool winch soon. '48 CJ2A 283 V8 sm 420 granny low, tera low D18, overdrive,lockers Texan at heart,Alabama by retirement |
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Ranger42
Member Joined: 06 Sep. 2011 Location: Gustavus Alaksa Status: Offline Points: 41 |
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Thanks for the offer of the cutter. I'm going to be doing a full rebuild on another L134 engine I have, so I plan to purchase a 60 deg cutter to have with my tool stash. All I need to do is figure how to get an engine from my brother's place in Pennsylvania to me in nowhere Alaska
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1950 CJ3A w/1945 MB Engine
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Ranger42
Member Joined: 06 Sep. 2011 Location: Gustavus Alaksa Status: Offline Points: 41 |
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Jeeper50,
I decided to remove the motor mounts and tilt the engine forward to install the cyl. #4 exhaust guide instead of rigging a reverse puller to press it in. I figured placing all that force on the upper inside of the valve spring / tappet area might result in something cracking that I can't fix: aka block. All I need to do is move the engine an inch.
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1950 CJ3A w/1945 MB Engine
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Ranger42
Member Joined: 06 Sep. 2011 Location: Gustavus Alaksa Status: Offline Points: 41 |
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Thanks everyone for the input on getting these valve guides driven in. I received the last two exhaust guides yesterday and drove them in no problem. I pulled the motor mounts and jacked the engine down about 2 inches to drive the cylinder #4 exhaust guide in. Good thing I pulled the mounts too since I discovered one was broken. Always something to fix. Keeps it interesting. Next step is guide reaming. I'll try to start a new topic on the reaming, cutting the seats, and re-assembly when the reamers arrive next week.
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1950 CJ3A w/1945 MB Engine
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srlbotanical
Member Joined: 03 July 2017 Location: Saranac MI Status: Offline Points: 395 |
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Congratulations!
Glad you got them all in. |
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Steve
1948 CJ2A - The Good Dog 1997 TJ - The Trail Rig 2001 XJ - The kids ride |
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