my question is....can you get bent valves if you install the head with the bottom end at tdc and the head not at tdc??? but catch it and turn the cam gears later to get it all lined up and in time. a friend of mine with a talon did this and I'm curious too...he usually asks me about stuff like this but I wasnt really sure about it...

 

Without cams or cams in time with bottom end

 

yes sir during installation they were not in time. but after the head was put on, later it was all put in time

 

Definitely possible but there is only one way to find out if it happened

 

ya saying compression testing???

yeah I hope this didnt happen to him...I know when things like that happen to me it sucks bad lol

 

Did he manually turn the motor over before starting it? Thats #1 thing to do to check for piston/valve clearances.

 

Sounds like he torqued down the head without the cams lined up so he probably wouldn't even noticed if he bent them. In the cam install video I know your supposed to have the dowel pins straight up in the TDC position along with the motor in TDC.

Reference Video (kinda old):
http://videos.streetfire.net/video/e...d00128e555.htm

 

Possible yes! likely...... no. But yeah... unless you had the head torqued down and then tried to "force" the cams into place...... you wont have bent valves.


turning motor by hand is step #1 before starting engine!!!

 

I just talked to him on the phone and he says he's getting 0 compression in all cylinders. at first he got 90 on cylinder #4 but then he tried it again and it was 0. I'm pretty sure he rotated it before he tried to start it to check the timing. ALSO he did NOT get the head resurfaced after blowing his head gasket. I suggested that to him but I guess he thought it wasnt necissary.

instead he used a dremel with a fitting on it to remove parts of the old head gasket that were stuck to the head. I know that this was not the best thing for him to do BUT i'd think you'd at least get a little bit of compression even if it's not sealing all the way. which makes me think some of his valves are bent/stuck.

 

bump. just tryin to get ya'lls opinions. he's pretty pissed off right now lol

 

tell your buddy he's an IDIOT for NOT decking his head!!!!!!! when you blow a head gasket.... 9 out of 10 times, you warp your head in one way or another. I had a Probe GT at one point in time, and i blew the head gasket. The final result was from the head studs stretching. and was had very similar problems afterwards

 

I think thats exactly what happened to his car. head studs streched because of too much boost and then HG blew...BUT I'd think even if it didnt seal all the way you'd get at least SOME compression. wouldnt you???

 

......................... good question!!!!! But i really dont think you would, considering if you do a compression test right, the engine needs to go through 3 compression revolutions to read accurately. then let it sit for a minute or so. to see if it holds.

 

I think one of the options is to just pull the head back off, shouldn't take more than a 1/2 hr.

 

good point! then get a "pro" to look at the head and top of the block!