rebuild or new

Discussion in 'Trucks and Trailers' started by STEVE HATFIELD, Feb 8, 2001.


    STEVE HATFIELD LawnSite Member
    Messages: 18

    have 1991 f-150/302....130,000 miles ...good reliable truck....has developed two bad cylinders/compression....guess it is common for #8 to go down and now a second has I rebuild,do I replace engine.(Jasper engine is about $2,500.00)...or trade????
  2. MowJo

    MowJo LawnSite Member
    from KY
    Messages: 70

    I think it depends on if your a good mechanic or know one. If you buy a rebuilt engine definately go with a Jasper, don't cut corners. I learned the hard way and got a rebuilt engine from Recon (Advance Auto Parts)...BIG MISTAKE. I saved a few bucks but ended up with a crap motor. On the other hand if YOU rebuild what kind of warranty will you end up with?

    In short, my advice is to spend a little extra on the Jasper and get a good warranty. In the end you will save time and money.

    Good Luck!
  3. John DiMartino

    John DiMartino LawnSite Silver Member
    Messages: 2,555

    try an aggressive Ford dealer,you might be able to get a new engine form them for about 1500-2100,I d try to get a factory engine,since I dont know of any reman's that are as good as the original.A wrecking yard can get you a used, motor,but you dont know what your getting and labor is only 200 cheaper to install a used engine than a new one,so do it right or trade it in.If its been a good truck,I know you dont mind investing the money-but remeber-the tranny-rear-and misc other things will be going soon too,so it might be a good time to cut your losses and sell it as is.
  4. Groundcover Solutions

    Groundcover Solutions LawnSite Bronze Member
    Messages: 1,254

    i have a 89 F-250 where the rear main blew and so on... so i decided to replace it, through much research i decided to go with the jasper. upon calling jasper customer service they informed me of installation shops that they endorse. i had to drive an hour each way twice but it was worth it. with a new exhaust, 351 long block, valves, covers, it came out to 4700. when the shop finished they told me i had the rustiest truck they had ever seen, "it looks like this thing sat at the bottom of the ocean for a few months" they said. i was proud to say the least. this was the cause for extra installation time, this also upped the cost. so this is my story of a new engine. definitely go with jasper, and ask for a reference, oh yeah and jasper sent the engine to the shop and picked up the old one without me calling or doing anything.
  5. wyldman

    wyldman LawnSite Member
    Messages: 182

    Common problem on the ford 302 is crossfiring between cyls 7 and 8.This results in a burnt piston,or broken rings,which drops the compression.#8 always goes first.Just one thing to check if you do put in a rebuild as the problem will happen again,and the warranty will not cover it.New wires will help,and route the #7 and #8 wires as far from each other as possible.Check with your ford dealer and get a copy of the Technical service bulletin on it.

    STEVE HATFIELD LawnSite Member
    Messages: 18

    If I replace it w/ a Jasper will this problem repeat itself or is it related to a Ford engine only???
  7. wyldman

    wyldman LawnSite Member
    Messages: 182

    Will do it with any 5.0L engine,factory or rebuilt (except 5.0L HO,due to diff firing order).Its not related to the engine,only the damage is.When the plug wires crossfire,it fires the other cyl too early causing the piston and ring damage.Just replace the wires and MAKE SURE that the #7 and #8 wires are no where near each other,as they can still crossfire with new wires after a while..Route the #7 along with #5 and #6 from the cap across the rocker cover to the plugs using the wire separators.Then route #8 straight back along the intake plenum and bring it down behind the coil to the spark plug.

    [Edited by wyldman on 03-02-2001 at 05:55 PM]

    STEVE HATFIELD LawnSite Member
    Messages: 18

    I assume damage is done? Any minor repair worth the time vs. replacing engine? Will this damage even if I reroute wires cause me to worry about bigger problems during the season.I really can't afford new truck and a new used is a roll of the dice again. Tranny appears o.k. is auto with o/d...and rear end seems o.k. also....have owned it tires,battery,shocks,muffler,fuel pumps,a/c, $2,500.00...$3,000.00 fair price for replace???

  9. wyldman

    wyldman LawnSite Member
    Messages: 182

    Once the damage is done,it's permanent.You could check the whole engine for compression again,as see what the condition of the other cyl's are,and also try to diagnose whether you have a upper or lower cyl problem.If it's just a valve problem,then you could always yank the head,and see,shouldn't be too much to fix.If it's a piston or ring problem and you feel the rest of the engine is OK,it can also be repaired at a reasonable cost.Get some quotes in your area and see.

    I am up here in Canada,so the prices may vary a bit,but a rebuilt 302 is 1495.00 and about 600-800 for installation.Throw in some misc stuff (ie plugs,oil,coolant,etc) and your probably looking 2500.00 or so.That would be probably 17-1800 US dollars.This would be a typical machine shop rebuild.Maybe not as nice as a jasper engine,but fine for your daily driver by all means.Stay away from the cheap mass rebuilders usually associated with the parts stores,they are garbage.

    STEVE HATFIELD LawnSite Member
    Messages: 18

    Would Kansas City be too far for you to drive? Seriously this has been very helpful!...If I did nothing else but redo those wires.....will it be too much strain on the engine to tow 800 to 1000lbs around a couple times a week? Also how do I identify the correct numbered wires??

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