last year as a bit of a hobby I did a massive overhaul on my 03 vts, replaced most things serviceable and cleaned up all the underside as a tinkering project.
as part of this I dropped a JP4 in there that was very low mileage.
Like a nob I rushed getting it running late one night and basically ran it whilst full of hot air as I missed a coolant bleed nipple. left it running on the drive for ages until it conked out. devastated, the gauges were not working either at that point. annoyingly a battery disconnect reset fixed that. It did run the next day but had very little power when the revs climbed.
Also when I tried the following day after the overheat I definitely had little air bubbles brimming in the rad cap, and after the engine had run (now with coolant flowing properly) not long after you shut down the engine coolant burst out the closed rad cap, like pressure was building whilst it was running.
My original idea was to make sure the conversion worked fine, run it a couple of months then during this winter to put the cams etc from the 86k j4 head into the jp4 head. I left it alone for the last 5-6 months but already thinking about a second wind this yr.
What would most do given the options below. I don't really want to take the block out again but if its more than likely to be shagged I don't want to try and polish a turd either.
1. Is it worth attempting to save the engine that's in there? (preferred if there is a chance its ok). Is it possible to identify any or all damaged parts? ie just change the head / take the head off for inspection. what can be done to check?
2. Alternatively I have another 17k JP4 or the original J4 laying around that I could use all or any of the parts from to start again this year. least favoured option, feel like I would prefer option 1. has anyone saved an engine from this bad a heat prob before.
cheers
as part of this I dropped a JP4 in there that was very low mileage.
Like a nob I rushed getting it running late one night and basically ran it whilst full of hot air as I missed a coolant bleed nipple. left it running on the drive for ages until it conked out. devastated, the gauges were not working either at that point. annoyingly a battery disconnect reset fixed that. It did run the next day but had very little power when the revs climbed.
Also when I tried the following day after the overheat I definitely had little air bubbles brimming in the rad cap, and after the engine had run (now with coolant flowing properly) not long after you shut down the engine coolant burst out the closed rad cap, like pressure was building whilst it was running.
My original idea was to make sure the conversion worked fine, run it a couple of months then during this winter to put the cams etc from the 86k j4 head into the jp4 head. I left it alone for the last 5-6 months but already thinking about a second wind this yr.
What would most do given the options below. I don't really want to take the block out again but if its more than likely to be shagged I don't want to try and polish a turd either.
1. Is it worth attempting to save the engine that's in there? (preferred if there is a chance its ok). Is it possible to identify any or all damaged parts? ie just change the head / take the head off for inspection. what can be done to check?
2. Alternatively I have another 17k JP4 or the original J4 laying around that I could use all or any of the parts from to start again this year. least favoured option, feel like I would prefer option 1. has anyone saved an engine from this bad a heat prob before.
cheers
