rebuilding m42

[///m42 sport]

well waited 2 1/2 weeks for the crank tool. Got setup to battle with the bolt and it was over before I knew it lol.  Didnt even use a breaker bars


what ya'll think of the profile gasket sticking out here?  is that normal?

[///m42 sport]

also coming back to this issue again. I thought it was a timing cover issue but now realize its a timing case issue  .  think that huge gash is repairable with jb weld, then a gasket sealer  to seal waterpump?

[SkidMark]

I might try looking for another timing cover... you could probably have it repaired, tig weld the gash, file smooth, drill and remove the broken bolt.. Im not sure about the jb weld? It would really suck after all the work you are doing to put it back together and have the jb weld fail.. A used timing cover might be a better option and cheaper.. As for the profile gasket, I dont like the looks of it. If it were me I would replace it. It may have bulged out after you removed the cover?? Another hate to have a leak situation....  Skid

[///m42 sport]

thanks skidmark, I thought about it  a little and decided to swap out the timing cover.  Profile gasket didnt look too bad but that waterpump surround didnt look like it would hold. 



I'm glad I took off the timing case.  Profile gasket looked in descent shape but could use a change


cleaned up the head surface.  Not much pitting

cleaned the block




then looked like I screwed up the timing.  I'm pretty sure the left cam moved a little after trying to take off the timing case.  How do I make sure the cams are lined up with crank? 

Also when I put the chain back in place, how do I know how many links should be between the gears?

[mabeer]

This was from another thread, hope it helps.

Timing is pretty simple. if you follow a couple of rules: 1) front cam lobes pointing up and slightly towards each other and flats at rear lined up so a ruler can be placed flat across them kind of like this

2) There is an arrow on the oil filter housing


That needs to point to the tooth with this mark on the harmonic balancer

There should be 15 tiing chain pins between the timing gear marks.
 
If you do that you should be good to go.

[///m42 sport]

aright thanks!

attempted to put on the lower timing case tonight. 

gasket'ed up


Used silicone rtv under the profile gasket and tried the feeler gauge method.


more feeler gauges


Got the bottom of the timing case mated up against the block and tried to use bolts to snug the top of the timing case against the block. 



Noticed that this might be a issue.  Its hard to tell from this pic but the oil pump is still angled against the slot on the crankcase and about a millimeter off from sliding in. The profile gasket it pushing down slightly against the timing case.  Havent found a good way to apply pressure up on the bottom of the case...I was thinking tommorrow ill wrap the engine with a racheted tietown.  Hopefully that will give enough pressure to push up on the timing case and allow the oil pump to slide onto the crankcase...Anyone have other ideas?

[///m42 sport]

this is something I came up with and trying out tonight.  Im thinking using the racheted rope will pull up enough on the gasket enough for me to clear that milliter gap at the oil pump/crankshaft slot.  I'm also setting the profile gasket inplace already so I wont have to mess with wedging it into place.  Wish me luck lol

[///m42 sport]

after 2 hours trying to get the timing case on, I'm almost there.  Learned a few things

I thought initially I would try to line up the top of the case first then pull the bottom up with the block.  That way I wouldnt have to mess with the profile gasket any and it would only be a matter of lining up the oil pump....
Found out it wasnt so simple.


wondered by the case wasnt budging and looked in the back and realized the crankcase wasnt clearing the hole on the timing case 


I guess its back to this method...using the feeler gauges to guide the profile gasket it.  will see if I can slap it on tomm night. 


I did find that you get a little bit more room to slide the timing case with the slots for the oil pump rotated up and down instead of horizontal.

[///m42 sport]

success tonight


got more tiedowns in place and the feeler gauges set.  block of wood was to more evenly distribute the pressure exerted by the tiedowns or risk cracking the weak aluminum case.  It worked really well!


Sorry bad pic.  Its just showing me using a flathead to push the gasket into place.  The feeler gauges helped alot but was not a perfect soluntion.  I still had to push the gasket in place in some sections. 

My only issue at this point is the mating surface for the oilpan is a hairline off on one side. I couldnt get the timing case to sit flat against the block.  I tried to push up on the timing case but it wouldnt budge. 

Think it would be ok for the timing case to be sticking about half a millimeter lower than the block on one side?

[///m42 sport]

couldnt get this any more level with the block 

[///m42 sport]

just noticed diff in the timing guides tonight




notice the mounting point to the left is taller than original

new guide is beefier and one of the attachment points is diff.  Wonder if I can run it without issues?

[colin86325]

The newer one is an upgraded design.  Be sure to to use the correct (longer) bolt that pairs with the newer rail.