1978 Jeep CJ-5 Dip Stick Tube Replacement

Jacobi-5 · 2025-09-22T08:30:28-0400

We are at the tail end of our 1978 CJ-5 rebuild. The dip stick tube broke, and we are trying to seat the new aluminum dip stick tube with a flared fitting.

We have pulled the oil pan, used dry ice to freeze the tube (shrink), and a bernzomatic to heat the block (expand). Pulling with pliers underneath, and tapping with an open wrench from above as the block has a flat section stopping a closed wrench from tapping it in. We still cannot get the tube to seat.

Has anyone has luck with this?

Buster1 · 2025-09-22T08:39:50-0400

What engine?

I was able to seat mine (AMC304) but it required a fair bit of filing on the flared part, and a little RTV in there to help seal it up.

Jacobi-5 · 2025-09-22T08:59:57-0400

Yes, it is the AMC 304. We did some filing too, but did not want to overdue it (may have to file some more).

Thanks so much!

wingless · 2025-09-22T09:06:57-0400

When I disassembled my 5.2L ZJ engine, of course I snapped the unobtainium dipstick tube.

My solution was to purchase a short segment of matching OD steel tubing and have a friend weld it onto the existing part.

Installation required some sanding of circumference to get it to fit.

JEEPFELLER · 2025-09-22T18:42:11-0400

Mine went in nice and snug

See Post 4 in here https://www.jeepforum.com/threads/c...ds/cj7-another-dipstick-question-please.4470925/?post_id=41575177#post-41575177

----JEEPFELLER

1978 Jeep CJ-5 Dip Stick Tube Replacement

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