Hello all. I'd like to clarify a few things and seek advice. I need to remove a head and check it out thoroughly seeing as I severely overheated the engine and now I've got blowby back into the carbs (77' 308 2v) on the Right bank? cyl 5-8.. So heres what I understand one must do.. Before removal, bring timing mark A-5 to TDC, insure it is on the compression stroke by verifying Distributor rotor position on plug 5 correct? Remove head etc. Can the head be removed with the engine in situe? or must the engine be dropped out. Obviously easier to drop the engine but I dont have a hoist so crawling around makes a sizeable job a figgin nightmare often times. Comments? Thanks Tom
I wouldn't try & remove the rear head , (never mind the front one!) with the engine in situ. But first I would do a compression/leakdown test & see what that tells you & also pressure test the cooling system. If you get to removing the head you might get lucky & it may just lift off, on the other hand it might take you several days & you may need to make a head puller (do a search & you'll see some of the fun & games others have had).
Good day Tom, I am pretty sure that you cannot remove the Cyl 5-8 head (front) with the engine sitting in the car without unbolting and rotating the engine... which you would need a hoist to do anyway. Remember that the head is mounted on studs and not bolts and so the head would have to travel the full length of the studs to remove it from the engine... and hence the problem. Do the diagnoses first (i.e. compression and leak-down tests) to determine where the problem actually is. If you do have a problem with the head, then do it right and remove the engine... it will be a whole lot easier. Cheers, Sam
No, the engine needs to be out of the car in order to remove the 5-8 head, and it can only come out by lifting.
Thanks Guy's I'll borrow my company's compression tester but I'm pretty sure I'll have next to nothing on at least 3 cyls. They being no.s 5,6,7 I suspect this because I have fuel vapor bubbling up like smoke through 3 carb.trumpets. (Positive pressure vs. Vacuum) I mean pissing out of them !! What are the chances that the timing belt skipped a couple of cogs? you cant just see the marks on the cam like you can when you look into the oil filler hole on the left bank when cyl 1 is at TDC. Any Ideas there? Regards Tom
It looks like you have bent valves. It's possible that your timing belt skipped. The engine will almost certainly need to come out.
Yeah I figured It was something radical like that.. Car runs good though, from idle right up to 6000, no missfiring etc. so probably did'nt screw my pistons or conrods etc. Yet !! So, Engine lifts out vs Lift Dropping out? Ive heard that one drops the engine so this is why I ask.. Thanks for your input guy's Tom
If it "runs good", your timing isn't off but if you have zero compression on several cylinders I doubt it "runs good". Your engine needs work. From here it's difficult to know exactly how much. 308 engine comes out the top.
the 5-8 bank heads can be removed with engine in situ... it isn't as hard as one thinks... look carefully.... the keys are in the manipulation of the motor mounts, and the shifter shaft.. removal of the manifolds.... it is tight, but not only have I don e it with 2v heads, I was required to do so-under a warranty claim-on a 4v head(THAT was UGLY, but again, do-able!) good luck..fwiw...
True.. I've got a few QVs in the car....But with all the stuff that needs to be removed, I find it far quicker to pull the engine. And, if the head is stuck on the studs, all the "in car" work was done for nothing. In warranty...all new and clean; sure it's worth a shot. 25 years of use; it's far easier to pull them and do the job right.
