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Timing cover for AMC 232 |
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Hornet_1971
AMC Apprentice Joined: Aug/16/2009 Location: Sebring, FL Status: Offline Points: 11 |
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Posted: Dec/03/2009 at 5:21am |
Hi -- I have been searching for a timing cover for a 232 in my '71 Hornet. I noticed there are new timing covers for the AMC 258 for sale on various websites. The bolts holes appear to line up, but the timing mark scale on the new covers appear to be in a different position relative to the original covers I have seen for the '71 Hornet. Will these new covers fit/work with my engine?
Thank you for your help! |
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ramblinfsj
AMC Addicted Joined: Jul/07/2007 Location: Lubbock, Texas Status: Offline Points: 1611 |
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I'm not sure about the timing marker but it should bolt up just fine. If you are still unsure about it just post an ad in the wanted section. There are plenty of guys pulling 232s out of their cars to make room for V8s. Somebody will have one and for much cheaper than new. I'd also call NAPA and see if they can get one specifically for a 71 Hornet.
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1982 Jeep J-20
1965 Rambler American 220 1978 Jeep Cherokee w/401 1983 Jeep J-10 1979 Concord DL 2dr |
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19689 |
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Around 74 some of the bolt hole sizes changed, but for the most part a later model timing cover, even a 4.0L cover, should fit. you might have to use some large washers on some of the holes as they were enlarged for a larger accessory mount bolt, and the timing pointer will be off, but it will more or less fit. I have a late 70s 258 cover on my 88 4.0L block, but don't need the timing marker for the EFI.
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Frank Swygert
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Hornet_1971
AMC Apprentice Joined: Aug/16/2009 Location: Sebring, FL Status: Offline Points: 11 |
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I appreciate everyone's input. I purchased a new timing cover from Quadratec. As you noted, the timing pointer is off so I'm going to look into purchasing a new harmonic balancer with a timing mark aligned for this cover. I found a new harmonic balancer for the AMC 232/258 with a timing mark that seems to be aligned for the later timing covers. The balancer is similar to my old one, but with the tick mark pointing in a different direction at TDC. I don't have the cover yet, but the mark seems to align with the TDC mark on the new cover.
Edited by Hornet_1971 - Dec/17/2009 at 5:04pm |
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6768rogues
AMC Addicted Joined: Jul/03/2007 Location: United States Status: Offline Points: 6241 |
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If you happen to have the head off, you can figure out where TDC is and mark your old balancer.
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pat walsh
AMC Fan Joined: Mar/26/2018 Location: pleasanton ca Status: Offline Points: 2 |
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Hi all...this is many years after your original post so I hope there is still info that will help me. I have the same issue with my 74 232. My machinist is trying to set timing but the cover timing marks do not match the TDC. I found a new 11 bolt hole cover for a 258 that states the cover fits, but the old cover is a 9 hole cover. We bought several harmonic balancers but the timing marks all line up at about the 1:30 position on a clock, but the scale of the timing marks on the old are the 1030 location and the timing mark doesn't have a scale or marks to line up on. How did you resolve this? Do you have manufacturer names or where I can find the parts.
Thank you
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FSJunkie
AMC Addicted Joined: Jan/09/2011 Location: Flagstaff, AZ Status: Offline Points: 4742 |
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232 and 258 timing covers are identical for the same year of each. 1971 232 = 1971 258.
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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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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19689 |
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The extra holes were added in 74 when accessory mounts changed. Sounds like you actually have a 73 engine, not a 74. On the sixes there is a code number stamped in the block just in front of the distributor near #3 spark plug, right where the block and head meet. It will be three numbers, a letter, then two numbers. The first number is the year code. That started in 1959 with a "1" as 1959, consecutive up to 9 (2 = 1960, no zero used), then repeats with 1 in 1968. So a 73 built engine would be 6, 74 7. You have to know the year range an engine type was built for the years to make much sense, but the letter is the engine size, so designates type. In your case it should be an E (1V carb) or G (2V).
The engine plant went by CALENDAR year, not model year. The code as well as changes to engines. So if you have a 74 model car it could very well have a 73 style timing cover. Timing mark location changed in 74 with the cover change. The marks on the balancer also had to change to correlate with the cover marks. Balancers interchange, covers should also. The 74 change added some bolts and changed sizes of some, but should seal against the block -- use washers with the smaller bolts. I haven't done that myself, but others reportedly have. You could have a 74 style balancer and a 73 and earlier style timing cover, or your balancer could have slipped. For now I'd just set #1 to TDC and mark the balancer. You can then measure the distance between the original marks on the balancer and transfer them or use a timing tape. Local speed shops might have a tape. https://www.speedwaymotors.com/MSD-8985-Timing-Tapes,5433.html?sku=5478985&utm_medium=CSEGoogle&utm_source=CSE&utm_campaign=CSEGOOGLE&gclid=EAIaIQobChMIoLe8mLGM2gIVXrbACh2SKAYBEAQYAyABEgJwYPD_BwE Honestly, I always set "by ear". Get it close, test drive up a hill with a good pull on the engine, and if it pings turn down a little and try again. Pings sooner/more? Too high, turn back down a little. Stops pinging? You're good. "Down" is the direction that the idle slows when running. This gets you the most timing for the fuel and conditions. That said, change those and you might have to bump timing one way or the other. Easy to do, just keep a wrench for the hold-down nut with you. Do this on a cold/cool day and you will likely have to adjust down a little on a hot day. Once you're there you're good though. You want to run as much timing as you can for best performance and economy. Still keep that wrench with you, if traveling and you change altitude a lot you might need to bump down, and different areas use different gasoline blends now, and that can affect timing. |
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Frank Swygert
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pacerman
Supporter of TheAMCForum Joined: Jul/03/2007 Location: United States Status: Offline Points: 9060 |
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The timing cover changed when AMC went to electronic timing at the engine plant I think. The timing mark then began to be read on the driver side of the engine. The new style balancer is used with the new cover. Joe
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pat walsh
AMC Fan Joined: Mar/26/2018 Location: pleasanton ca Status: Offline Points: 2 |
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Great info and it did the trick...thank you ll so much
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