[Wild Monkey]

I was driving my SC 2.0L down the highway WOT. I looked down at the speedo, and noticed that I couldn't get over 100mph. I let off the gas and started having some serious problems. Burning massive oil and misfiring something awful. I made it home and downloaded my ECU to find that my #1 and #3 cylinders were misfiring like crazy. Question being, is this going to be a blown headgasket, or possibly just the piston rings on the 1 & 3. Also, does anyone know about beef ups for these parts, so it doesn't happen again. PS, I've only got about 55,000 miles on this engine.

 

[sbiggi]

Re: 8v engine Guys, need serious help (Wild Monkey)

do a compression test, a leak down test, and check your oil for antifreeze in it....then you'll know, it could be alot of things
good luck

 

[GtiGyver]

Re: 8v engine Guys, need serious help (sbiggi)

like he said... don't guess, check first.

 

[nirav]

Re: 8v engine Guys, need serious help (gti_8v)

you think this could've happened cause of your supercharger? i have second thoughts installing one now....

 

[Clean97GTi]

Re: 8v engine Guys, need serious help (Wild Monkey)

Any other mods? Cam perhaps. If so, you may have messed up a valve. The way you said its burning oil, it might be a ring.

 

[Wild Monkey]

Re: 8v engine Guys, need serious help (Clean97GTi)

I've only got the SC as far as an engine mod, and if it is because of it, it'll be becausre I'm running extra boost with that smaller pulley. There is a Porsch/BMW/Audi specialist local here. I think I'll be handing it off to him for some repairs. Just going to get the whole engine torn down and reworked. Hopefully get some beefed up internals. I'd like to do all the tests you suggested, but I don't have the equpitment or skills necessary for it. That, and with the amount of oil I'm burning, I really don't want to start the engine at all.

 

[left turn scirocco]

Re: 8v engine Guys, need serious help (Wild Monkey)

You should at least pull out the spark plugs and see what they look like (for curiosity if nothing else).

 

[engine101]

Re: 8v engine Guys, need serious help (left turn scirocco)

I dont' believe you'd be burning oil if it were the head gasket.

 

[Wild Monkey]

Re: 8v engine Guys, need serious help (engine101)

Today I pulled off the charger and the lower intake manifold, (where the fuel injectors plug in). I saw oil on the number 2 injector, and in the number 3 intake port. As I'm looking towards the engine, where the lower manifold hooks up, I see the 1-3 valve seated up, while the fourth one is slightly lower. Is that normal?

[Modified by Wild Monkey, 6:15 PM 4-11-2002]

 

[Wild Monkey]

Re: 8v engine Guys, need serious help (Wild Monkey)

Pics a little bigger tha I though it would be. Anyhow, that is the #4, and as you can see it is not flush with the top of the port. The rest of them are...

[Modified by Wild Monkey, 6:16 PM 4-11-2002]

 

[TurboABA]

Re: 8v engine Guys, need serious help (Wild Monkey)

I think you just experience DETONATION. Too much boost, not enough fuel. Time to follow in my footsteps and do it right the second time!

 

[Wild Monkey]

Re: 8v engine Guys, need serious help (TurboABA)

Possibly, but there was a serious amount of smoke the rest of the way home., Real rough idle, too. Not sure, maybe it was caused by detonation, but I think the effects were more serious.

 

[Wild Monkey]

Re: 8v engine Guys, need serious help (Wild Monkey)

Ok, well I just finished putting the engine back together, adn tried starting it, and after I fixed the fuel lines to the fuel rail, I tried starting it again, and when and IF it starts, the idle is SUPER rough. Time to go to the shop...

 

[JettaRed]

Re: 8v engine Guys, need serious help (Wild Monkey)

Did you smell coolant or see steam/white smoke come out of the exhaust? That would be a sure sign of a blown head gasket. What size pulley are you running? 2.6" or 2.4"? Is yours a MKIII or MKIV?
If you have the wherewithall to install and remove your charger, you can do a compression test. A compression gauge is $25 from PepBoys (or your local auto parts chain) and instructions come with it. Just disconnect the coil pack or distributor wire and remove the fuse for the fuel injectors (fuse 32 on the MKIV). That keeps fuel and spark off during the test.
Good luck--I hope it's not serious.

 

[Wild Monkey]

Re: 8v engine Guys, need serious help (JettaRed)

Ok, who's the smarta$$ that put "Get a Honda" on the list? That's blasphemy, you know... Anyway, all I noticed out of the exhaust was SMOKE! I could smell the oil burning. I checked my coolant level yesterday after I put everything back together, and it was where it was supposed to be. I'm running the high-alt pulley from Neuspeed, 2.6 inches, I think, and I've got a MkIV. I'll be turning it over to get worked on. Money isn't a problem, so I'll just get done what needs to be done. Anybody know of a parts dealer that sells beefed up internals for the 2.0L Mk4?

 

[eurotrashrabbit]

Re: 8v engine Guys, need serious help (Wild Monkey)

Sounds like you may have a cracked or burned piston or wasted rings from too much boost. Remember that boost and detonation do not mix bad things happen.

 

[Wild Monkey]

Re: 8v engine Guys, need serious help (eurotrashrabbit)

I'm thinking that getting a more agressive cam, like a 268/260 or less, allowing more air to go into combustion, and not be left behind to build up manifold pressure would be a good idea. Any thoughts? I was also considering taking the butterfly valve/plate out of my throttle body, leaving the post intact as not to render to TPS useless. Any ideas on that?


[Modified by Wild Monkey, 11:52 AM 4-13-2002]

 

[JettaRed]

Re: 8v engine Guys, need serious help (Wild Monkey)

I would not remove the throttle plate or you will be running lean most of the time.

 

[GtiGyver]

Re: 8v engine Guys, need serious help (JettaRed)

Don't get a more agressive cam otherwise you will actually lose compression since alot of the boost your SC will give you will leave through your exhaust. If anything, get a high list short duration cam like the one in G60 engines.

 

[Wild Monkey]

Re: 8v engine Guys, need serious help (gti_8v)

I was looking to decrease manifold pressure. Will putting a G60 cam in there help me out? And where could I get one for my Mk4 2.0L?