74' L48 Dipstick Tube Replacement

[Robert S.]

The dipstick tube is incorrect and I need to replace it with a correct tube. I understand the tube is a press fit into the engine block. Since I do not plan to keep the old tube I thought I might remove the old one with a l vicegrip on the tube hitting the vicegrip with a small hammer (assuming I can find room to do this). For installing the new one I am open to suggestions but I could drill a hole (or slot) just slightly bigger than the tube in a metal plate, slip the plate over the tube down to the flange at the end and use a hammer on the metal plate to install (again assuming there is room to do this).
I am looking for comments or feedback on how others have done this task on an installed engine (car would be up on blocks). Also any tips/comments on tube circumferential alignment during installation as I assume once it is seated it cannot be turned if it is off position.

[Martin N.]

Re: 74' L48 Dipstick Tube Replacement

BOB-

On my 74 L-48 the dip stick tube pulled right (an aftermarket chrome one) out after I got it to rotate slightly in it's block hole. The new correct ube was then test fitted and then I polished the block end of it with emery paper and just tapped it in with a heavy plastic hammer. Mine, I could rotate slightly after install but it was a little tuff. No leaks from it so far after about 1 1/2 years. Good luck.

Marty

[Jeff S.]

Re: 74' L48 Dipstick Tube Replacement

This is a 'midyear' type solution, but I don't think the concept would be significantly difference on your '74.

Put your dipstick tube in the freezer overnight & have the female portion of the block cleaned & ready. Use a flare wrench over the upset base protion of the tube & a small hammer to drift it home.



When adjusting the alignment, take into account (1) the exhaust manifold width & it's cast pocket inboard of the tube, and (2) the plug heat shield & the notch that encloses the tube, and (3) any clearance issues with the master cylinder/booster.