Well first off let's talk tools:
a) 5/16 x 18 bottom tap (must be bottom tap)
b) High temp RTV
c) A drill
d) razor blade or gasket scraper.
e) Floor jack
f) Hex sockets
g) Socket wrench extension.
- Jack up the tranny about 2"-3" so that the back of your engine tilts more straight, this will allow you to reach the back bolt.
- First remove the old plastic cover.
- Take razor or scraper and get all the crud, old gasket, etc off of the top of the head and clean it well.
- Check the bolt holes on the passenger and driver's side to make sure they are threaded and your new bolts fit.
- If some didn't fit, you'll need to drill the holes about 1/2" deeper and then tap the holes with the bottom tap.
- Should only have to tap driver's side on most 258s.
- Put the gasket and cover on and dry fit it... make sure all the
holes line up.
- Remove gasket and cover. Place a thin amount of RTV all around the top of the head.
- Place gasket on top. (some guys tell you to RTV top of gasket, but don't, the gasket will slide and bulge out the sides when you tighten it down)
- Place cover and bolt down. I recommend you do the little bolt in the back first.
- Tighten the bolts around the head, making sure the gasket doesn't slide out and is evenly spaced around the head.
- Put CCV, PCV and oil cap on.
- Crank engine, rev it a few times, check for leaks.
- Let it set up an hour or so... Take it for a cruise and throttle it!
- Look for leaks... done deal.
Questions, email me firstname.lastname@example.org