1998 S70 GLT TURBO questions

[rmmagow]

I have a 98 V70 AWD, without propshaft so, a GLT I think. Never owned an NA and seriously, the turbo has not been an issue. Synthetic oil, cool-down before shutting down, off the loud pedal until it's warm and they run great. Little extra plumbing, and some tightness for some engine maintanance tasks but the extra oomph is well worth it. Can't run regular gas though, 89 or higher only. I'm actually looking for an N/A (not too too seriously, but....) withthe thoughts of better economy via regular fuel, but for what it's worth, any Volvo white motor, blasted or regular seem to run forever with proper care. On a side note, you, cn90, wouldn't have any problem caring for a turbo motor.

[cn90]

I've got a '97 855 GLT with the light pressure turbo at ~160K miles. I have replaced the coolant hoses to the turbo once and the oil return line gasket twice over the past 8 years or so...

Can someone point me to a DIY with pics for this. I want to replace the coolant hoses preventively.
Also PNs for the hoses would be great.

TIA!

[rspi]

If you look on the passenger side of the motor between the motor and firewall you'll see a short coolant hose. It is double layered, you can replace that one. Also, I had to replace the oil cooler hose but man, that one is expensive and may have already been replaced: http://atthetipwebs.com/technologyinstr ... l_line.htm

I think there is another hose that can be replaced but things usually leak before they fail. You can poke around IPD's website to see the other parts and track them down.

So, you picked up a GLT?

[rspi]

Can't run regular gas though, 89 or higher only. I'm actually looking for an N/A (not too too seriously, but....) with the thoughts of better economy via regular fuel, but for what it's worth, any Volvo white motor, blasted or regular seem to run forever with proper care.

Sorry to be the bearer of bad news but the NA cars have higher compression ratio and are suppose to use 91+ octane. Your GLT should run fine on 87+ octane, however you are suppose to run 91+ in that car as well. Our car runs strong in heat or colder weather. You may want to check that out. Plugs, wires, etc.

[jblackburn]

Can't run regular gas though, 89 or higher only. I'm actually looking for an N/A (not too too seriously, but....) with the thoughts of better economy via regular fuel, but for what it's worth, any Volvo white motor, blasted or regular seem to run forever with proper care.

Sorry to be the bearer of bad news but the NA cars have higher compression ratio and are suppose to use 91+ octane. Your GLT should run fine on 87+ octane, however you are suppose to run 91+ in that car as well. Our car runs strong in heat or colder weather. You may want to check that out. Plugs, wires, etc.

Turbo increases compression dramatically past 10,5:1. Turbo cars should get a diet of 89 or greater octane.

[inlineframe]

Can't run regular gas though, 89 or higher only. I'm actually looking for an N/A (not too too seriously, but....) with the thoughts of better economy via regular fuel, but for what it's worth, any Volvo white motor, blasted or regular seem to run forever with proper care.

Sorry to be the bearer of bad news but the NA cars have higher compression ratio and are suppose to use 91+ octane. Your GLT should run fine on 87+ octane, however you are suppose to run 91+ in that car as well. Our car runs strong in heat or colder weather. You may want to check that out. Plugs, wires, etc.

I thought GLT's have a passion to have excessive heat during the summer? Mine has always been heating up badly during this summer, not sure why...

[rspi]

Not sure what you mean by heating up but the temp on our car never got above 3 o'clock on the gauge untill my daughter ran it out of water when a hose blew. I use to plug my ScanGauge II into it and watch the temp that way as well. Even in 100+ degrees F out the car never got hot running down the highway with the car loaded, even in Texas in August. It would also run like a scalded dog, no performance issues. I suggest that you hook a OBD-II tool up to it and take a digital reading from it when you think it's running a little warm or right for that matter.

We always run 91+ octane in our cars, mainly because the engineers recommend it. I believe we get better gas mileage with it and it's a sure way to avoid knock. I understand that the turbo runs the rpm's up real quick but I have never heard that it drives compression up. I alway thought compression was all about piston chamber size and stroke. The manual says it has a 8.5:1 compression ratio and I was watching a tv show (mechanic special on Saturday TV) that claimed that cars running 9.0:1 and higher compression ratio really needed to run 91+ octane. These turbo's are so close and they rev up so quickly I guess Volvo recommends it.

From driving a few newer cars, seeing the power they are squeezing out of the smaller engines, my guess would be that just about all of these cars need 91+ octane. We get 93 here if you go above 89.

[cn90]

I just took a photo underneath the car.

The hose that goes from the Turbo to the front of the car, does it carry hot air to be cooled by the "cooler"?

VolvoGLTTurboHose1.JPG (110.63 KiB) Viewed 1447 times

[cn90]

If you look on the passenger side of the motor between the motor and firewall you'll see a short coolant hose. It is double layered, you can replace that one. Also, I had to replace the oil cooler hose but man, that one is expensive and may have already been replaced: http://atthetipwebs.com/technologyinstr ... l_line.htm

I think there is another hose that can be replaced but things usually leak before they fail. You can poke around IPD's website to see the other parts and track them down.

So, you picked up a GLT?

Yes I picked a 98 S70 GLT, relatively well-maintained by a gentleman who only took the car to Volvo dealer for service. I guess the recent repair bills drove him to sell the car (I have the service records lol). The car has a lot of new parts from Volvo.
So I am in the process of bringing it back up to par.

-------------
Re Turbo maintenance, I will look up PNs for the items you recommended. However if you have the PNs (the items in bold letters above), it would be great too. Could you pick out for me which items in the link below that I need to "worry" about?

http://www.eeuroparts.com/Cars/Volvo/17 ... er-System/

[erikv11]

I just took a photo underneath the car.

The hose that goes from the Turbo to the front of the car, does it carry hot air to be cooled by the "cooler"?

VolvoGLTTurboHose1.JPG

Yes, that is the intercooler piping, where it connects to the intercooler.

http://bit.ly/U7yJHg