White93z34 Posted March 15, 2006 Report Share Posted March 15, 2006 alright this is a sad sight here, afte a mere 3000 miles my buddys L67 blew the headgaskets after we had redone them, so he started to tear it down, and metal shaveings were all through the top of the heads, and so were these: what they are, i don't know. valve seals???? and the severly cooked MLS gaskets and the heads: now, i'm prety sure there should not be oil in the intake.... and the engine after the first days work, tommrow it should be out so he is quite sick about his 5000 mile engine gernadeing, and i don't want to know how much he had invested into that build, oh well, to the junkyard tommrow for a new L67. Quote Link to comment Share on other sites More sharing options...
z284pwr Posted March 15, 2006 Report Share Posted March 15, 2006 Umm, damn, that sucks, only 3,000 miles? That sucks big time.... What exactly was done to this engine anyways for it to be a build? Quote Link to comment Share on other sites More sharing options...
White93z34 Posted March 15, 2006 Author Report Share Posted March 15, 2006 i'll ask him tommrow, but heres a partial list of things .10 or .20 over diamond pistons intense stage 1 cam ballance shaft delete MLS headgaskts double roller timing chain ARP headstuds 9:5:1 compression total it has 5000 miles on it, but 3000 since we redid headgaskets, we initally had a problem with the MLS gaskets sealing properly and leaking externially. its real depressing since everywhere we turn theres more metal flakes to be found. but now, its time to demod the car (to an extent), and just get it relyable. Quote Link to comment Share on other sites More sharing options...
fastbird232 Posted March 15, 2006 Report Share Posted March 15, 2006 If only I lived in this magical land where there are L67s in junkyards... so what's he doing with the blower? Quote Link to comment Share on other sites More sharing options...
White93z34 Posted March 15, 2006 Author Report Share Posted March 15, 2006 no idea, he may sell it, or might keep it as a spare, the new engine is coming with a blower, so we are just gona use it. Quote Link to comment Share on other sites More sharing options...
sl3196 Posted March 15, 2006 Report Share Posted March 15, 2006 Musta been doing something wrong... Quote Link to comment Share on other sites More sharing options...
john99gtp Posted March 15, 2006 Report Share Posted March 15, 2006 every L67 ive seen where the SC has been ripped off has a little bit of oil in the manifold. one ive even seen a puddle. From what i was told, a little bit is normal. but that sucks Quote Link to comment Share on other sites More sharing options...
19Cutlass94 Posted March 15, 2006 Report Share Posted March 15, 2006 Ouch. Quote Link to comment Share on other sites More sharing options...
DaveFromColorado Posted March 15, 2006 Report Share Posted March 15, 2006 I've seen lowmilage engines let go a few times ... Usually what it ends up being is whoever did the block machining did it wrong and didn't level the deck surface properly ... Might be somethin' to look into - most machine shops will help make up for mistakes like that (maybe not tons of free stuff, but some free machine work down the road type deal) --Dave. Quote Link to comment Share on other sites More sharing options...
Brian P Posted March 15, 2006 Report Share Posted March 15, 2006 did he assemble the engine himself? Quote Link to comment Share on other sites More sharing options...
White93z34 Posted March 16, 2006 Author Report Share Posted March 16, 2006 no, a local machine shop did the work, and the more we tear into it, the more it seems that the bottom end is perfect, i'm thinking something in the heads let go. then today we just pulled it out, and are about to start getting the new engine ready. pics will follow later tonight. Quote Link to comment Share on other sites More sharing options...
slowmontecarlo Posted March 16, 2006 Report Share Posted March 16, 2006 i'll ask him tommrow, but heres a partial list of things .10 or .20 over diamond pistons intense stage 1 cam ballance shaft delete MLS headgaskts double roller timing chain ARP headstuds 9:5:1 compression total it has 5000 miles on it, but 3000 since we redid headgaskets, we initally had a problem with the MLS gaskets sealing properly and leaking externially. its real depressing since everywhere we turn theres more metal flakes to be found. but now, its time to demod the car (to an extent), and just get it relyable. I dont see an IC in his mod list. What size blower pulley was he running? Even with a stage I cam I would be surprised if he could get away with a 3.4 pulley with that much compression. Quote Link to comment Share on other sites More sharing options...
95oldsVan Posted March 16, 2006 Report Share Posted March 16, 2006 Whats the reason for the balance shaft delete?Wouldnt it help to keep it in there? Quote Link to comment Share on other sites More sharing options...
DaveFromColorado Posted March 16, 2006 Report Share Posted March 16, 2006 I'd measure the deck height on all the cylinders - I'd be willing to bet - even with everything assembeled properly, that one issue is what caused the problem. I saw a supercharged 302 mustang go through headgaskets because of a bad cut on the deck with a difference of just .012" from the front to the rear - meaning the front cylinders had a comp ratio of 9.2:1 and the rears were at 8.9:1 (huge difference!) that's the only reason I recomed checking the deck height. --Dave. Quote Link to comment Share on other sites More sharing options...
J Posted March 16, 2006 Report Share Posted March 16, 2006 if you need diamond pistons again, my buddy is the shop manager. The shop is about 10 minutes from my parents house Quote Link to comment Share on other sites More sharing options...
White93z34 Posted March 16, 2006 Author Report Share Posted March 16, 2006 no intercooler, we were talking tonight, he was saying that in hindsight doing that high compression with no IC was probably hurting him. he was running a 3.4 pulley, which will probably make it over to the new engine. as for why he removed the ballance shaft, i have no idea essentially after looking over the old engine today it could be reused with no problem, but at this point we are sick of fighting with it and just want the car relyable and to stay that way, so going to a low mile stock block is the best way we see to do it. Quote Link to comment Share on other sites More sharing options...
Euro Posted March 16, 2006 Report Share Posted March 16, 2006 damn man, what a bad deal..... Quote Link to comment Share on other sites More sharing options...
White93z34 Posted March 16, 2006 Author Report Share Posted March 16, 2006 more pictures, as promised. its out! the old engine tore down and cleaned up. old engine, new engine, and bill. why i feel it s a BAD idea to use the drilled flexplate, the metal was getting awful thin and beat up between those 2 holes, and this was only after 5000 miles. a new one is being ordered. and the new engine is about ready to go in. Quote Link to comment Share on other sites More sharing options...
99RegalGS Posted March 16, 2006 Report Share Posted March 16, 2006 A lot of people remove the balance shaft because it takes a bit of power to turn that. IIRC it's about 15hp. If you remove it the engine won't be as smooth, but many of the people who remove them don't really care about the added vibrations. Quote Link to comment Share on other sites More sharing options...
Psych0matt Posted March 16, 2006 Report Share Posted March 16, 2006 so since you mentioned the flexplate (sorry to hijack) i noticed the 96 is solid, and the 94 has a few holes and such. would it be worth the work to swap it? or just leave the solid one for strength purposes? edit: nevermind, I think I bent the 94 one on the engine crate anyways Quote Link to comment Share on other sites More sharing options...
z284pwr Posted March 16, 2006 Report Share Posted March 16, 2006 Wow, you guys must have some killer junk yards. I don't even think we have a car newer than a '94 in the ones around here that will actually let you get stuff from them, none the less a 3800 SC II in 2-days Quote Link to comment Share on other sites More sharing options...
chadz34 Posted March 16, 2006 Report Share Posted March 16, 2006 That sucks, hopefully the second engine lasts a bit longer. Quote Link to comment Share on other sites More sharing options...
94 supreme Posted March 16, 2006 Report Share Posted March 16, 2006 http://cgi.ebay.com/ebaymotors/pontiac-grand-prix-gtp-l67-short-block-modified_W0QQcmdZViewItemQQcategoryZ38634QQitemZ8047192773QQrdZ1 Nows he's trying to sell it Quote Link to comment Share on other sites More sharing options...
Brian P Posted March 16, 2006 Report Share Posted March 16, 2006 wow... Quote Link to comment Share on other sites More sharing options...
94 supreme Posted March 16, 2006 Report Share Posted March 16, 2006 I mean i could be wrong but this looks like the exact same engine Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.