Sir Nibble Posted September 23, 2020 Report Share Posted September 23, 2020 14 hours ago, Machpoint005 said: And the engine was designed in the first place by an engineer (mechanical variety). He (or she) probably didn't intend the socket head bolts to be left loose. I get this at work. I get consulted then it's passed on as "the engineer says". I've pointed out that I'm not an engineer, I'm a technician. I couldn't do the engineer's job and he couldn't do mine. Just now, Timx said: I tried but it says I can only upload 2.93mb ? I have had another look and see where it could come from, but it’s not from gear box or alternator, too far away and no empty holes I can see, so I will just go ahead , and hope it’s what the mechanic dropped Ok, but it does look like a through bolt from the common type of prestolite marine alternator. That is, the bolts that actually hold the alternator together. Link to comment Share on other sites More sharing options...
Tacet Posted September 23, 2020 Report Share Posted September 23, 2020 If that is grease showing on the threads, it is less likely to have been in a pocket for any length of time. Unless the pocket was full of grease. Link to comment Share on other sites More sharing options...
Man 'o Kent Posted September 23, 2020 Report Share Posted September 23, 2020 What is "interesting" about that bolt is that it is 'bright'. Most Allen screws are black being made from heat treated high tensile steel. The fact that this one is bright implies that it is made of stainless steel, not uncommon but normally only used where corrosion is a serious enough consideration to make the compromise of a lower tensile strength acceptable. Also "interesting" is the shoulder under the head, this may well be a washer but if not it is unusual, making it a bit of a 'special'. The fact that there are fretting marks on the shank of the screw shows that it had been loose for some time. One plea: If at all possible when taking such pictures include a ruler of some sort in the picture as an aid to scale. "A picture is worth a thousand words." But something to give scale too can double that. The image in this post, as useful as it is, But is it 12mm or 2BA? Any one care to make guess? Link to comment Share on other sites More sharing options...
Machpoint005 Posted September 23, 2020 Report Share Posted September 23, 2020 (edited) I agree with the 'include a ruler' plea but in this case we can get some idea of the size from the battery isolator switch nameplate and the cross-head screw that holds it. It is bigger than 2BA, but certainly not 12mm. Edited September 23, 2020 by Machpoint005 Link to comment Share on other sites More sharing options...
WotEver Posted September 23, 2020 Report Share Posted September 23, 2020 50 minutes ago, Machpoint005 said: I agree with the 'include a ruler' plea but in this case we can get some idea of the size from the battery isolator switch nameplate and the cross-head screw that holds it. It is bigger than 2BA, but certainly not 12mm. Looks like M6 to me. Link to comment Share on other sites More sharing options...
Machpoint005 Posted September 23, 2020 Report Share Posted September 23, 2020 I can't be sure, but it certainly looks about that size so M6 is a logical deduction! Link to comment Share on other sites More sharing options...
Timx Posted September 24, 2020 Author Report Share Posted September 24, 2020 (edited) On 23/09/2020 at 14:43, Man 'o Kent said: What is "interesting" about that bolt is that it is 'bright'. Most Allen screws are black being made from heat treated high tensile steel. The fact that this one is bright implies that it is made of stainless steel, not uncommon but normally only used where corrosion is a serious enough consideration to make the compromise of a lower tensile strength acceptable. Also "interesting" is the shoulder under the head, this may well be a washer but if not it is unusual, making it a bit of a 'special'. The fact that there are fretting marks on the shank of the screw shows that it had been loose for some time. One plea: If at all possible when taking such pictures include a ruler of some sort in the picture as an aid to scale. "A picture is worth a thousand words." But something to give scale too can double that. The image in this post, as useful as it is, But is it 12mm or 2BA? Any one care to make guess? Thanks for all replies, but as I can’t upload anymore photos, it’s pointless to continue, but I have continued a 5 and 6 hour journey in last two days and nothing bad has happened so far. The screw does look like the ones off the alternator tightener, but it’s half the size, and would of had to of catapulted to get where it ended up.Thanks for taking the time to reply, annoying I can’t upload photos apart from original. Edited September 24, 2020 by Timx Link to comment Share on other sites More sharing options...
WotEver Posted September 24, 2020 Report Share Posted September 24, 2020 13 minutes ago, Timx said: I can’t upload anymore photos Sure you can, you just need to ensure they’re within the site’s size limit. I forget what that is but it’s over a meg which is a pretty huge image. Link to comment Share on other sites More sharing options...
Timx Posted September 24, 2020 Author Report Share Posted September 24, 2020 How do you change that Link to comment Share on other sites More sharing options...
Timx Posted September 24, 2020 Author Report Share Posted September 24, 2020 I see now how to do photos thank you, engines I’m crap Link to comment Share on other sites More sharing options...
WotEver Posted September 24, 2020 Report Share Posted September 24, 2020 2 minutes ago, Timx said: I see now how to do photos thank you Yer welcome. You can also use one of the many online resize sites; just Google “online photo resizer” 1 Link to comment Share on other sites More sharing options...
Timx Posted September 24, 2020 Author Report Share Posted September 24, 2020 The screw would of had to ping ponged to get there just below to the right of oil filter , if from anywhere else I think, but I know so little, is it worth me getting a mechanic in to check it. Link to comment Share on other sites More sharing options...
WotEver Posted September 24, 2020 Report Share Posted September 24, 2020 2 minutes ago, Timx said: is it worth me getting a mechanic in to check it. I think your time would be better spent enjoying your boating 1 Link to comment Share on other sites More sharing options...
Timx Posted September 24, 2020 Author Report Share Posted September 24, 2020 Can’t. Find a measure 3 Link to comment Share on other sites More sharing options...
Timx Posted September 24, 2020 Author Report Share Posted September 24, 2020 6 minutes ago, WotEver said: I think your time would be better spent enjoying your boating If I had not had someone in the engine bay recently, I would of definitely had known it was from engine, but hopefully he lost something and never told me, time will tell, thanks for replies.Thankfully it wasn’t on engine floor to make me more paranoid. Link to comment Share on other sites More sharing options...
Man 'o Kent Posted September 24, 2020 Report Share Posted September 24, 2020 5 minutes ago, Timx said: Can’t. Find a measure I remember when that stuff first turned up in our sailing club, so toothsome you could almost chew it. But them were the days when it was brewed not manufactured, nuffink lasts, gnat's p**s now. As to getting a scale, almost anything of a regular shape that is in common use will do, a coin being a good example. Thinking about the origins of that screw, I'm beginning to think it may well be an interloper. Link to comment Share on other sites More sharing options...
1st ade Posted September 25, 2020 Report Share Posted September 25, 2020 10 hours ago, WotEver said: ...but it’s over a meg which is a pretty huge image. Er. Not these days! Link to comment Share on other sites More sharing options...
WotEver Posted September 25, 2020 Report Share Posted September 25, 2020 15 minutes ago, 1st ade said: Er. Not these days! No, it’s got stupid these days. The mantra appears to be “Storage is cheap, let’s use loads of it”. Link to comment Share on other sites More sharing options...
Sir Nibble Posted September 25, 2020 Report Share Posted September 25, 2020 Take a close look inside the socket head. With a magnifier if possible. If it has shiny tool marks it's been deliberately removed and you can set your mind at rest. Link to comment Share on other sites More sharing options...
Timx Posted September 25, 2020 Author Report Share Posted September 25, 2020 Does seem to not be perfect. Link to comment Share on other sites More sharing options...
matty40s Posted September 25, 2020 Report Share Posted September 25, 2020 19 minutes ago, Timx said: Does seem to not be perfect. Well drink some proper beer instead of that can of stella and everything will be perfect. Link to comment Share on other sites More sharing options...
Timx Posted September 25, 2020 Author Report Share Posted September 25, 2020 It’s not a can of Stella, it’s a screw head that somebody suggested I look at , but thanks for your advice, I do drink beer as well. Link to comment Share on other sites More sharing options...
Sir Nibble Posted September 26, 2020 Report Share Posted September 26, 2020 11 hours ago, Timx said: Does seem to not be perfect. Wear is inevitable, what you are looking for is six shiny marks suggesting there's been a tool in there recently. Link to comment Share on other sites More sharing options...
Tracy D'arth Posted September 26, 2020 Report Share Posted September 26, 2020 Cap head allen bolts are not a feature of Isuzu engines. Link to comment Share on other sites More sharing options...
Featured Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now