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Old 01-28-2009, 02:17 PM
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help needed. PLEASE

hey jeep owners out there... im 17 and i have a 87 wrangler 4.2l automatic. everything looks mint and runs well besides the engine. i have a rod knock. im not loaded with money so what should i do. replace the straight 6 or put a chevy 350 i have laying around. thanx guys!

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Old 01-28-2009, 02:23 PM   #2
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If you have a 350 laying around, that is where my vote goes!!!

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Old 01-28-2009, 02:50 PM   #3
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When I was 17 I was pretty strapped for cash. If I were you, I would pull another 4.2 and drop it in. If you have a little money, drop the 4.0 EFI in. If money is no object, THEN put the Chev in your Jeep. After all, the Jeep was designed to have a Jeep motor and the quickest way to get yours running better would be to drop in another Jeep motor. The fact that you have a Chev sitting around muddys up the water a little. There are chev conversion kits to help you out if you are so inclined. Are you an experienced welder/fabricator? If not, IMO don't even think about the chevy. Just drop in another Jeep motor.
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Old 01-28-2009, 02:55 PM   #4
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Dont put a chevy motor in, your askin for alot more headache than its worth, Id check your oil pan make sure you didnt dent it, I know that what mine was and it maybe yours too, I just had to pound it out and replace after a good rinse with gas and let it dry
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98% of people when they are about to go into the ditch say "oh shit!" The other 2% are Minnesotans and when we are about to go into a ditch we say "Hold my beer and watch this shit!"
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Old 01-28-2009, 02:56 PM
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yea im kinda strapped for money now loll.... i have a steady pay coming in so it isint to bad.... i was thinking about taking out the 4.2 i have in it now and rebuilding the whole thing. maybe even bore it. and put the mc2100 carb on..... how does that carb fit. is it an exact fit ?? thanx for all the help man
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Old 01-28-2009, 02:57 PM
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nope.. no dent... droped the oil pan in the summer cleaned it all out and painted it. good as new
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Old 01-28-2009, 03:26 PM   #7
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Yeah the bumpstops are helpful to avoid denting the oil pan, done that already, but they are expensive for what they are.
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Old 01-28-2009, 04:05 PM   #8
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Yeah the bumpstops are helpful to avoid denting the oil pan, done that already, but they are expensive for what they are.
Oh yeah, I need to make or buy some but I dont have the money I need to see what the factory ones look like so I try to make some more
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Mine: 1987 YJ 4.2 5spd soft top
98% of people when they are about to go into the ditch say "oh shit!" The other 2% are Minnesotans and when we are about to go into a ditch we say "Hold my beer and watch this shit!"
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Old 01-28-2009, 05:18 PM   #9
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Im in the same boat you are, im trying to avoid to many large bumps until i got some stops on there. I think im gonna buy some generic ones and do some fab to make them fit. There should be some pictures on the internet of orignal stops.
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Old 01-29-2009, 09:28 AM   #10
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youngwranglerman87,

I have the mc2100 and I love it. It had to be tuned by a pro, but since then it runs great. It is a perfect match. This guy sells them on ebay and has a great reputation. I bought mine from him. Items for Sale by ehrmannmp
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Old 01-29-2009, 03:23 PM   #11
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Im in the same boat you are, im trying to avoid to many large bumps until i got some stops on there. I think im gonna buy some generic ones and do some fab to make them fit. There should be some pictures on the internet of orignal stops.
Where you getting generic ones at? How much are they?

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Mine: 1987 YJ 4.2 5spd soft top
98% of people when they are about to go into the ditch say "oh shit!" The other 2% are Minnesotans and when we are about to go into a ditch we say "Hold my beer and watch this shit!"
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