Big R Posted May 30, 2021 Share Posted May 30, 2021 Got a 673 turbo wondering what’s you guys think of the amount of blow by. Warmed to 165 IMG_1451.MOV Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/ Share on other sites More sharing options...
theakerstwo Posted May 30, 2021 Share Posted May 30, 2021 It could have some water in the oil making some steam 1 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-474515 Share on other sites More sharing options...
Big R Posted May 30, 2021 Author Share Posted May 30, 2021 Hope you are right. The oil don’t look too bad so we are running it a bit to see what there might b for issues. Seems to run fine so will get an oil change and maybe not b so much. Does that seem pretty excessive for this motor, stupid but I just don’t know. Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-474516 Share on other sites More sharing options...
terry Posted May 30, 2021 Share Posted May 30, 2021 I have seen them run a long time like that. terry 1 Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-474532 Share on other sites More sharing options...
Big R Posted May 31, 2021 Author Share Posted May 31, 2021 Smoke alot(blueish), especially when warming up after start. Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-474572 Share on other sites More sharing options...
Joey Mack Posted June 1, 2021 Share Posted June 1, 2021 rings?? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-474573 Share on other sites More sharing options...
terry Posted June 1, 2021 Share Posted June 1, 2021 1 hour ago, Joey Mack said: rings?? Valve guides? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-474575 Share on other sites More sharing options...
Joey Mack Posted June 1, 2021 Share Posted June 1, 2021 I bet it runs great.... Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-474577 Share on other sites More sharing options...
Dirtymilkman Posted June 1, 2021 Share Posted June 1, 2021 Is it spitting any oil out the tube? Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-474579 Share on other sites More sharing options...
Rob Posted June 1, 2021 Share Posted June 1, 2021 Need to determine if it is oil bypass, or as Glenn mentioned "steam" which is indicative of coolant in the oil. Swipe the internal surface of the vent hose to ascertain whether oily residue, or coolant which will be sort of "sweet" smelling. Although the smoking or steaming is abnormal and indicative of wear, I've seen a lot of old Thermodyne engines smoke, or steam like that and run/work quite well. 1 Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-474584 Share on other sites More sharing options...
1965 Posted June 1, 2021 Share Posted June 1, 2021 If it’s been sitting a long time might be moisture from time. if it’s been working, do an oil analysis. Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-474585 Share on other sites More sharing options...
Big R Posted June 1, 2021 Author Share Posted June 1, 2021 We haven’t been able to work it very hard, just a few real short trips. Would an oil analysis be accurate, not sure of last change or how long it sat but I think a long time. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-474626 Share on other sites More sharing options...
mrsmackpaul Posted June 2, 2021 Share Posted June 2, 2021 dunno, to me it needs to be run hard got hot, then see what the go is If it still has bad Indians you have a problem, until then we are only guessing Paul 2 Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-474628 Share on other sites More sharing options...
fjh Posted June 2, 2021 Share Posted June 2, 2021 My suggestion is to change the oil and the thermostat 165 It is running to cold! also if the truck sits lots check the drain plug for water in the base by crackin the drain plug Also ! The filler bung will have evidence of green on it if it is coolant assuming your running coolant! If it just blow by and it runs just keep running it As stated it will run like that for a long time ! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-474651 Share on other sites More sharing options...
Big R Posted June 5, 2021 Author Share Posted June 5, 2021 I will follow up on ur suggestions as soon as I get a chance. It does run real nice and smooth. Thanks all for your input, we appreciate it. Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-474740 Share on other sites More sharing options...
Big R Posted June 13, 2021 Author Share Posted June 13, 2021 So we put a clear jug over the vent hose and got no oil only steam. Down in the filler bung I found white cream, so water getting in for sure. I really watched the smoke last time we started it up and it is probably more white than blue. Does this mean it is burning antifreeze? Head gasket? Is there other places it could be leaking? I get what ur saying about it probably being fine, I’m gonna run it the way it is but I like the input so I have a better idea of the condition of the engine. Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-475187 Share on other sites More sharing options...
theakerstwo Posted June 14, 2021 Share Posted June 14, 2021 If you run it with coolant in the oil it with spin main brgs and rod brgs.You better rethink this over real well.It will not last long.When a rod or main spins it a block and crank for sure. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-475190 Share on other sites More sharing options...
theakerstwo Posted June 14, 2021 Share Posted June 14, 2021 To find the coolant leak on the oil you need to pull the pan and pressure the coolant system and let set till coolant leaks from inside on to the floor. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-475191 Share on other sites More sharing options...
Rob Posted June 14, 2021 Share Posted June 14, 2021 If the engine has an oil cooler installed the sealing rings are probably leaking which separate the oil from the coolant. Common problem on those engines with age. I've rebuilt three of mine from the same thing. 1 Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-475193 Share on other sites More sharing options...
Big R Posted June 15, 2021 Author Share Posted June 15, 2021 What pressure would you put on the coolant system I probably should also order some seals for the oil cooler. Are they hard to find Rob? Easy to change? Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-475224 Share on other sites More sharing options...
theakerstwo Posted June 15, 2021 Share Posted June 15, 2021 20 to 25 psi Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-475232 Share on other sites More sharing options...
Big R Posted June 15, 2021 Author Share Posted June 15, 2021 Ok thanks. I will try that Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-475234 Share on other sites More sharing options...
Joey Mack Posted June 16, 2021 Share Posted June 16, 2021 Bundle type oil cooler o-rings are still availlable... may i suggest pulling the oil filter pad and resealing it as well. you are already there. ... also you can make 2 simple little blocking plates to pressure test the oil cooler.. I did this a few years ago. I used 1/4" aluminum flat stock... I made 2 caps. In one of them I tapped 1/4 npt threads and installed an air compressor nipple.... The test is done at 80 P.S.I. in a tub of water. I did this on an E-6 2 valve that I am building. In my case, My oil cooler was good... Jojo 2 Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-475268 Share on other sites More sharing options...
Big R Posted June 16, 2021 Author Share Posted June 16, 2021 Thanks for the advice, I think that’s a great idea. I will try that Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-475272 Share on other sites More sharing options...
Joey Mack Posted June 16, 2021 Share Posted June 16, 2021 they are crude, but totaly worked. I cut my own gaskets to do the test and these caps did not blow bubbles during the test... 2 Quote Link to comment https://www.bigmacktrucks.com/topic/66849-blow-by/#findComment-475276 Share on other sites More sharing options...
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