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Hello, I have a 1955 M170, is it suppose to have a ventilation valve on left side of engine or a 2" hose. Mine has a 2" hose and didnt know if it was a field fix?

Brian

All M38's, M38A1's & M170's came with a PCV valve on the left side valve cover area. Only the early M38A1's (52-53) and USMC contract M38A1's came with the fording valves. Later were sometimes added and earlier were usually removed and substituted with a short hose. But the PCV valve (Positive crankcase ventilation) stayed on all. If it was removed by a not so smart prior owner then get one and re-install it.


Most A1's look like this with the PCV valve still there and the fording valve gone.

Perfect, this is exactly the info i needed.

Thanks!
Brian

On a different subject, where did u get that 6" flexible fuel line. I could use one.

Also, which direction should PCV go..

This is the original plumbing on the 52 & 53 M38A1's.



Here's a new in the crate 1962 issue replacement engine:



In the image below from TM 9-8014 Fig 52 dated April 1955, you see the short piece of rubber hose instead of the fording valve.



In this image below from TM 9-8015-1 Fig 4 dated Mar 54, you see the fording valve is included.

The whole system, both standard crankcase ventilation and the fording valve systems are explained in great detail in TM 9-8015-1 chapter 6.

If you don't have it now, download it free:
http://www.willysmjeeps.com/v2/modules. ... tit&lid=85

bl5211a - flexible fuel lines are available from a number of MV parts suppliers. You could try Midwest Military.

Thanks..

Here's how they ended up:

You can also take your old line to any car parts dealer that can use the printed catalog and they can locate the same or close enough with a female 5/16" steel tube fitting on one end and a male 5/16" steel =tube fitting on the other end.

thanks..