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Type: Posts; User: MattZimmerman

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  1. Re: 671 engine, oil in coolant - diagnosis help request

    Thought I'd check in 6 month later. Coolant is coming out non greasy and haven't had any overheating issues. She's running fine.
  2. Re: 671 engine, oil in coolant - diagnosis help request

    So I thought I'd close the loop on this. jgmo was right, who tests your equipment is critical. It wasn't until we removed the oil transmission cooler the SECOND time and had it tested that we found...
  3. Re: 671 engine, oil in coolant - diagnosis help request

    and thanks Ron, I didn't know about the Low Block configuration, I haven't ordered any parts yet, but that is good information. I've only owned the boat for 3 years and haven't been into the block. ...
  4. Re: 671 engine, oil in coolant - diagnosis help request

    left phone message
  5. Re: 671 engine, oil in coolant - diagnosis help request

    Well the good news is that I'm pretty comfortable draining the system now. We'll take that plate off and see what we see. Looks pretty easy to change.
  6. Re: 671 engine, oil in coolant - diagnosis help request

    2573125732
    Not what I expected to find. One pictures shows lines running out of the coolant tank. The other shows same lines running into transmission. So is the oil cooler installed inside the...
  7. Re: 671 engine, oil in coolant - diagnosis help request

    New information:
    Now that I am monitoring closely it seems apparent that the oil loss is coming from the transmission. The engine oil level has not changed noticeably. That has to the transmission...
  8. Re: 671 engine, oil in coolant - diagnosis help request

    We finally got the oil test results, so we are going to proceed with a flush with degreaser just to ensure that we are not taking off the head when a "added oil by mistake" mistake is a possibility. ...
  9. Re: 671 engine, oil in coolant - diagnosis help request

    It occurred to me the other day that my entire problem could be a mistake by a "helpful" part time captain that added oil to the coolant tank, though I think this unlikely since the coolant tank is...
  10. Re: 671 engine, oil in coolant - diagnosis help request

    Think we are going to start with the top end rebuild. I'm actually hoping that I will see a blown seal when we get the head off. It does look like I would have to pull the engine to do the full...
  11. Re: 671 engine, oil in coolant - diagnosis help request

    yeah, inline, not a v. Sorry, duh.

    no heaters or the like, but with oil in the coolant I wouldn't put that high on the probability list anyway

    The former owner of this boat did the rebuild...
  12. Re: 671 engine, oil in coolant - diagnosis help request

    Thanks for the reply.
    I guess I should have said transmission oil cooler and engine oil cooler, they are separate units.
    I checked for external leaks with the coolant tank full. I haven't drained...
  13. Re: 671 engine, oil in coolant - diagnosis help request

    Okay, update.

    I found the receipt/report from the gear oil and transmission oil cooler. Says they were pressure tested from 20 -170psi, no leaks.

    I got the hand pump kit and found this today: ...
  14. Re: 671 engine, oil in coolant - diagnosis help request

    Thanks jgmo,
    I will check with the shop on the results of the pressure test, or do it again. I will also find out about how the system in configured. I did not consider coolant in the oil. Would...
  15. Re: 671 engine, oil in coolant - diagnosis help request

    Well damn, I was hoping not to have to get into the head. Commerical boat and rolling into the business season through Jan 3rd or so. The boat is running on average 3 hours a day (not that busy). ...
  16. Re: 671 engine, oil in coolant - diagnosis help request

    Heat exchanger is probably due for a cleaning, we'll get the pressure test done at the same time. That's a good idea. Thanks Lepke. You think I should do the compression test first? I'm leaning...
  17. 671 engine, oil in coolant - diagnosis help request

    Symptoms:
    oil in the coolant and slowly loosing coolant, otherwise engine performing normally

    We thought to check the oil cooler, pulled it, took it to a shop, they opened it, did their thing and...
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