1987 740 Volvo

I have a 1987 740 (non-turbo) with 200,000 miles. Mine was in bad shape when I bought it 6 months ago for $500. I did a restore job on it and now it is as good as new.

First, where is it smoking from? If it ran then smoked and won't start, the spark plugs may be fouled and might need to be replaced.

Second, for $400, what do you expect from the car, realistically? If someone is mechanically inclined, a lot can be done on this car with a little talent and knowing where to buy parts.

My personal choices are FCPGroton.com, IPDUSA.com and the local parts store for common items.

It will be hard to sell a car that won't start, unless you try to sell it as a project car or a parts car.

Being a turbo, there may be other things that I am not familiar with, but something is coming to mind that I cannot recall exactly. I think there is something in the turbo system that can smoke if damaged. I am sure someone else will chime in, but please offer up a few details:

OK, thinking more about this, $400 is not unreasonable for this car, but your circumstances are curious.

Here is what I think:

A) This car was in good running order, then something broke.

B) The car broke, someone put a quick patch to sell the car and the patch failed.

I am an optimist, but am leaning towards B. That being said, investigate. My raw, gut feeling is either the turbo failed, or maybe someone hot-rodded this car, cracked the heads and patched it with JB Weld to hold it over until they could sell it. Or, to a lesser degree, the rings are shot and they filled it with some "treatment" to mask it and not foul the plugs until the car was sold.

Have a mechanic check out the turbo and the head.

If it's cutting off, the first thing to check is the engine wiring harness, I'm sounding like a broken record on this newsgroup by now but until '88 or '89, if the harness is original it WILL be bad and the car WILL NOT be dependable. Thankfully this is a fairly simple if not super cheap repair unless you do what I did and carefully replace each damaged wire and rebuild the harness.

Next, suspect the fuel pump relay, it's in the center console behind the ash tray.

What color is the smoke? Black smoke could be the wiring harness causing the injectors to stick open, blue smoke is probably a clogged crankcase breather or worn oil seals in the turbocharger.

Fantastic car if you get it fixed up, if it was only $400 it probably needs quite a bit of work but they're a real joy to drive and super easy for a shadetree mechanic. I have the same car and I love it.

James, you are sure right about the wiring harness being an all too common thing these days. I'm just wondering how someone could get a car to drive well for a week, then crap out.

Gotta love our Swedish buddies. (Our Volvos). My buddies at work call my Volvo "my Swedish Boyfriend". Ouch!

JB James Sweet wrote:

When I saw the condition of my harness after cutting it open I was astonished that mine had run so well for the nearly 6 years I'd been driving it, the main part of the harness was a bunch of bare wires all bundled together which went to the injectors and ignition stuff. The even more scary part is that several times I had the car out in the middle of nowhere in northern BC and central Alberta, alone, miles from nowhere with no cellphone. Still, she never let me down when I was more than a few miles from home.

If the smoke is blue, is not seen when the engine is first started, and especially if it is worse at idle, start by cleaning the crankcase ventilation system. If it gets restricted the crankcase pressure will build up and oil will dribble out of the turbo into the exhaust.

The entire ventilation path has to be cleaned, but at least it isn't terribly hard to access. Most of it is the large hose that extends from the side fitting on the turbo intake duct, across the top of the engine (that's where it is most obvious), and dropping through the intake manifold branches on the other side. The hose can be pulled out completely for cleaning. I know it looks big, but mine was nearly plugged solid. Under the intake manifold the hose connects to a plastic box, held down by the two bolts (10 cm heads). The box can be removed and cleaned with carb cleaner or lacquer thinner, but it is hard to clean effectively. Reaming with a knife helped mine a lot. Others like to replace it, and I understand why! Anyway, when blown through it should have about as much resistance as puckering up to blow out a candle. The O rings on the underside should also be replaced to prevent oil leakage.

That may be why you got a good deal. The seller didn't know what to do about the smoke and assumed it was a bad turbo seal.

Mike