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Need help with an engine problem |
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Xplorer
AMC Apprentice Joined: Jun/07/2013 Location: Sellersville PA Status: Offline Points: 40 |
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Posted: Apr/16/2014 at 2:36pm |
I have a '69 Javelin with a 343 engine. A long time ago (my guess,10 yrs) I took the heads off the engine to get them rebuilt. I covered the short block with a fender cover and got busy on redoing my AMX. I have since sold the AMX and wanted to get the Javelin running. When I removed the fender cover, I found that even though the car was stored in my garage, mice had set up home in the intake valley. I have gotten all of the damage taken care of, other than 1 cyl. getting rusty on the lower side of the bore. I have tried using scotchbright and it made the cyl. shine other than where the rust is. When I run my finger over it, it still feels rough. What would be your suggestions? Thanks
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whizkidder
Supporter of TheAMCForum Joined: Mar/03/2008 Location: North Georgia Status: Offline Points: 2972 |
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Hard to say without knowing the exact depth of the rust pits, and their location with respect to the travel of the rings in the bore. If below the rings, you might get by as is by honing the rust down to the surface of the metal. However, if it is rusty in the ring travel area, it may need to be bored, or at least that cylinder sleeved and bored to fit the existing piston.
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Ron Frost
marne1ancient @ gmail.com 910 nine two two 0563 "There is no limit to what a man can do, so long as he does not care a straw who gets credit for it. Charles Montague |
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amxdreamer
AMC Addicted Joined: Jul/30/2008 Location: Vancouver, BC Status: Offline Points: 8494 |
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You have no idea were those little buggers traveled and urinated etc. as they can get into REALLY small spaces. I would pull it, tear it down and check it all while apart. New bearings are cheap and you might get away with a hone, some rings and a gasket set. Spend a ton of time with some rifle brushes cleaning every oil passage etc.
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Tony
Vancouver, BC 1970 AMX 1972 Badassador AMO#10333 |
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THE MENACE
AMC Addicted Joined: Nov/04/2008 Location: So. California Status: Offline Points: 4428 |
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Good advise, X2 on above!!
You might find more problems (non mouse related) or wear that needs to be addressed while you are in there.
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Former Owner of:
The Craig Breedlove "AERO AMX" Still Owner: SS/AMX #9 replica (THE BIG MENACE) 70 AMX 416, EFI, Nash 5 speed 70 Javelin 401, 727 (Wife's) 72 Gremlin Autocross Project. |
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Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
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Overhaul it...
Mice and moisture are a bad thing.
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Gremlin Dreams
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uncljohn
AMC Addicted Joined: Jan/03/2013 Location: Peoria AZ Status: Offline Points: 5394 |
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To answer your question as best as I can, obviously AN answer is a full rebuild, all new parts, hone and or rebore, have the block tanks and yadidi yadidi and yadadi. That is an easy answer.
On the other hand many years ago under different circumstances and a different engine I put an engine in that had rust damage in a cylinder and that cylinder was cleaned out, using a wet dry sand paper sanded with probably 200 or so and then 400 or so (it was a long long time ago) and some light oil like WD-40 and assembled and a lot of miles were put on it. So if you have a HONE and some wet dry paper and some time and all you want to do is make it work. My guess is you can. A decent set of basically cast iron rings are probably in order but maybe what you have would work just fine. Your engine, your decision and if you get done it goes vroom vrioom you win and if it doesn't if you don't care, don't worry about it. |
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70 390 5spd Donohue
74 Hornet In restoration 76 Hornet, 5.7L Mercury Marine Power 80 Fuel Injected I6 Spirit 74 232 I-6, 4bbl, 270HL Isky Cam |
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FSJunkie
AMC Addicted Joined: Jan/09/2011 Location: Flagstaff, AZ Status: Offline Points: 4741 |
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Mouse piss is just about the most corrosive chemical on Earth...
Short of the crap KDOT spreads on the roads around here 6 months out of the year. I swear it is pure sulfuric acid. |
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1955 Packard
1966 Marlin 1972 Wagoneer 1973 Ambassador 1977 Hornet 1982 Concord D/L 1984 Eagle Limited |
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Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
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Here in NH it's a diabolical mix of salt, sand and calcium chloride.
Add to that our rain forrest like weather and few cars last more
than 10 years on the road.
I have four cars over 10 years.
A 1992 Corsica (last winter was it's first ever on the road)
A 1994 Chevrolet Z-28 (never seen the road in winter, and it's for sale)
A 2000 Mecury sable wagon (California car till last year)
And a 1974 AMC V8 Gremlin :-)
My 2006 Dodge Dakota has seen 8 wintahs and is disintegrating :(
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Gremlin Dreams
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Wrambler
AMC Addicted Joined: Jul/02/2007 Location: West Virginia Status: Offline Points: 4197 |
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If it is a ring of light pitting, crescent shaped. You can even get by with dropping the piston to the bottom of the bore and running a ball hone with lots of oil. you can build a damn of petroleum jelly to keep any flakes abouve the piston top then carefully scrap it off when done.
You may notice some oil use, perhaps that cyl may oil the plug a bit. Maybe even need to clean it once and a while. But, I'd bet it will run ok. When you have a scratch running vertically up the bore is when you loose all compression. a Sideway collection of small pitts does not allow as much compression and oil to pass. If the heads are off? I'd pull it. If it's all good but that one bore, get it baked, boiled and a sleeve with new cam bearings etc; You'll know what you have then and probably not totally break the bank. cast iron rings a pretty cheap and seat in fast. We're just talking a lowbuck build. On the negative side; if the mice were at home in the valley, what's the cam look like? |
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Wrambler
69 AMC Rambler 4.0L, 5 speed 2015 Grand Cherokee Limited 2019 Chrysler 300 |
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Xplorer
AMC Apprentice Joined: Jun/07/2013 Location: Sellersville PA Status: Offline Points: 40 |
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