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Need some help diagnosing a coolant leak in the passenger side between the block and head. I can see coolant dripping from the tab of the head gasket. Obviously my first guess would be the head gasket, but compression is consistent with all other cylinders around 165. Looking through the...

So I've lifted a head gasket :mad: . It leaks coolant from the back of the engine between passenger head and block outward, and runs down the starter. I don't have the funds or time to fix it, so my minor loss is your gain. 1987 Grand National, 118XXX miles on the body. Motor has around 5000...

I need the manifold block and lines that bolt to the back of the compressor for my 87 GN. Let me know what you have with prices shipped to 40006. Thanks, Chris Posted from the TurboBuick.Com mobile app

I've done some research on the tailpipe smoke I've developed and I've found that the valve seals on all of my exhaust valves (at least on the passenger side; haven't check the driver side) have came loose and are riding up and down. I can tell that the exhaust seals look different than the...

I've developed a smoking issue that I'm having trouble figuring out. At idle I'm puffing smoke and revving in park blows out more. I'm sure it's oil smoke but I can't determine the source. At first I thought maybe something went south with the engine but I have solid 180s compression on all...

I'm changing filter and fluid in my 87 gn and have a question. The seal at the top of the old filter looks different than the new one. It's stuck in the bore as I expected but it isn't an o ring like the new one. It's a wider orange rubber seal. There wasn't an O ring on the old filter when I...

For Sale 1987 Buick Grand National with T-Tops, 117k miles on the body. The car has been restored to like-new. I'm located in Bedford, KY, about 1hr from Louisville, KY and about 1.5hr from Cincinatti, OH. You can check out pics here...Dukesie79's Grand National Album @ Photobucket.com...

This plenum came in a box with a bunch of other stuff when I bought my GN. The TB bore diameter is ~64mm. I think the previous owner said he bought it on eBay but didn't use it because the throttle cable didn't travel properly when installed. I think maybe it was binding because the car has a...

This car had an old SMC alky kit on it when I bought it and the PO fabbed the up pipe for a BOV, IAT, vacuum port, and dual alky nozzles. I'd like to keep the pipe as is, but I'm concerned about the locations of the nozzle ports. I'm upgrading to Alkycontrol single nozzle and want to know your...

I just purchased an Alkycontrol kit and now I'm wondering...do I need to upgrade my TT chip for alky? I think I had Eric program it for max 18psi and NO alky. I'm running a JoeP manual boost controller, so can I just turn it up as I'm tuning the alky system or do I need to have the chip...

OK guys, I figured this was going to happen. Replaced my old pump with a TT340 from TurboTweak (Thanks Eric!) and now I can't get the fuel pressure adjusted below 55psi line off. I am using a modified Bosch regulator for adjusting (not an Accufab or similar.) I know the issue is the...

The aftermarket fuel pump in tank now is flaking out on me so I'm looking to upgrade. I'm really looking for a good drop-in pump that can suit my setup. I've been doing a lot of reading and it looks like the DW301 will be the best bang for the buck. I'm running 50# injectors and a TE60 with a...

Need help figuring out what turbo is on my car. I was told it was a "60mm turbo" but doing some 'net surfing I think I'm finding out different. Here's what's on it... Garrett Turbo Code: 61 Model: TB03 P/N: 466748-9005 S/N: 16216500 Exhaust housing is A/R .63 Compressor is A/R .60...

Just did a compression test to get some baseline numbers. Fresh rebuild, approx 1000 miles, test performed after a 10 minute drive and 45 minute cool down. Mods in signature. I saw numbers from 172-181 across all cylinders. From searching others' results on the board, these seem kind of...

I've had on-again, off-again KR issues, upwards of 15deg at times. I'm still searching, trying to determine if the KR I'm seeing is actually a false reading. O2 mV's always read good after I've registered knock, 790-805mV. It will sometimes show knock at 12-13psi. I've narrowed it down to...

Just got my TT 5.6 chip today and I'm anxious to try it out on the street. My question is, how does the WG solenoid hook up? The car had a manual boost controller on it when I got it and it has nothing hooked to the solenoid. Can anyone help with description and/or pics. That would be much...

I have a super clean 87 Grand National, paint is near perfect. Car was repainted within the last few years, doors were redone 2 years ago. New rear bumper fillers. Body has been off the frame, all new ES Hyperflex suspension bushings, new body bushings, Eibach 2" drop springs, Bilstein shocks...

I'm having issues with my old round tank SMC kit with dual nozzles. I've been fighting knock issues and have ruled out everything but the alky setup. I've read through some other forums where guys have talked about minimum pressures for this kit being somewhere around 75psi. I read 30 is...

Hey guys, I'm new to the GN world and need some help. This is a long post, but please bear with me. At WOT I'm getting some knock retard (up to 10) and my O2mV are going low (680.) I also have an LC-1 WB that reads a little lean (~13.0) at WOT also. The guy I bought the car from pretty...

I just bought my GN last week and I'm trying to figure out what chip it's running. It has a sticker on it that says "To the Max." I was told the car has 50lb injectors. It does have an old, round tank SMC Alky kit on it, and it also has that anti-theft deal where you have to turn key on, close...