GSX... with a bad cyl

[DSMGary]

Hi all,

I have been looking for an automatic 2G DSM as my daily... I see this advert on craigslist... please see below... it looks to me that the guy is asking too much and is perhaps hiding something... i have not seen the car yet... u will try to make an appointment to view it soon... Please let me know if this sounds like a big job or not... ALSO he does not mention what year the gsx is...


Eclipse Gsx - $4000
Auto, black on tan. need gone ASAP. 119xxx

Good: Greedy Bov From 2010 Evo (two weeks old)
Greedy turbo timer
two tens MTX subs full trunk box
Falkin low pro tires on core racing rims 80% tread left
Leather, power everything+sunroof
Extremely well maintained have recites for everything over $4000 invested in last year and a half

The BAD:
Cylinder #3 has a lower compression then the rest #1=180 #2=170 #3=90 #4=170
This is most likely caused by a sticky valve car still runs and can still be driven.

this may be fixed by something as easy as a fuel system cleaner or the head would have to be pulled.

Have a great looking/running eclipse! do it yourself or get a mechanic to do it for around 1000 bucks

 

[Doubleot]

The car doesn't come with any extra parts to make me think it's worth 4k with low compression.


I don't see it being a stick valve or being as easy to clean with a fuel system cleaner.

I would offer 2k cash at the most.

 

[1gcrazy]

Yeah wayyy too much. If he takes 2k it'd be worth it ONLY if you get to do a compression check on the motor first. Bring some oil to verify rings or head.

 

[DSMGary]

yeah good point guys... What are normal compression test values for the 4g63 anyways... it seems like the numbers are high for a turbo car.... no...?

 

[1gcrazy]

Good point, didn't notice that. Yeah those numbers are a little high. Maybe ok for a freshly rebuilt engine. I thought they were supposed to be around 150-160. I could be wrong though. All the cars i've ever own are around 130ish. Mainly because of altitude I think. Or I have terrible luck.

 

[DSMGary]

u r in the rockies... but the alt should not have much if any effect on the compression a cylinder makes... from what i remember... its a differential of pressure that we are interested in... just my 2 cents... interested to see what others have to say about the car and the comp... Thanks!

 

[razrman8]

Figured that I would stop by and shed some light on this situation. The correct compression for a 2nd generation 4g63 is approximately 178-180.

 

[Spoolin18]

It never is as simple as" pour in a bottle of" I had a car with low compression in cyl#1 and the head was f--up. Thats way to much, seems shady to me. I would pass or do my own test as stated above and offer less.

 

[1gcrazy]

If the air is already thin when entering the cylinder, logic tells me that when compressed, it will be LESS air. I could be wrong. When it comes to boost, now thats another story.

 

[Tanro]

90 sounds really low. I would do a wet test and see if that brings the compression back up.

If not your looking at cylinderhead warp, bent valves, cracked valve guides.

 

[DSMGary]

If the air is already thin when entering the cylinder, logic tells me that when compressed, it will be LESS air. I could be wrong. When it comes to boost, now thats another story.

Hey, Logic says u are right... (i think...?) ... does this mean u make less power when u in higher elevations? anyone here a thermodynamics/barometric guru...?

 

[ChiTownHussla]

Wouldnt less air compressed be just less air? Not less than what was started with

 

[Spoolin18]

Hey, Logic says u are right... (i think...?) ... does this mean u make less power when u in higher elevations? anyone here a thermodynamics/barometric guru...?

any car especialy forced induction loses power at higher elevations.

 

[white92talontsi]

Forced induction suffers at higher elevation but N/A suffers more.

Sent from my PC36100 using Tapatalk

 

[DSMGary]

Thanks for the response. Looks like iam not going to buying this one. After about 5 mins of talking to him on the phone, the owner says that i am asking too many questions and that he just wants to sell it fast.

And thats the end of it...