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1995 Volvo 850 engine question

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

1995 Volvo 850 engine question

Postby krisncilla » 21 Feb 2010, 03:12

Is the engine in my 1995 volvo 850 Non-Turbo station wagon a inteference or non-inteference engine..I need to know cause my timing belt blew on my car after 25,000 miles and I hear no engine noices when i go crank the car
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Re: 1995 Volvo 850 engine question

Postby polskamafia mjl » 21 Feb 2010, 03:21

Oh God. lol Yes it is an interference engine. Were you driving when it happened? How mechanically inclined are you and how much does the car mean to you? There are two routes to go a. get a used engine and drop it in b. take the head off, send it away to get smoothed out and replace anything that got mashed up when you broke the belt. Plan a is cheaper and easier, plan b is more fun.
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Re: 1995 Volvo 850 engine question

Postby Ozark Lee » 21 Feb 2010, 03:21

Welcome to MVS, I wish it was under happier circumstances.

It is indeed an interference engine. If you blew the belt then you have bent several valves. It is a tossup as to whether you just put in a used engine or rework the head in dollar terms. If you have a good maintenance history on the car I would lean toward fixing the engine that is there now.

What failed? The belt itself or one of the rollers or the tensioner? The belt normally doesn't just break without external causes.

...Lee
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Re: 1995 Volvo 850 engine question

Postby krisncilla » 21 Feb 2010, 03:38

the belt is intact but the guy who looked at it said it jumped a gear or something because the belt is till in good shape. I was at a stop light and when i went to step on the gas the car stalled out. when i go start the car it cranks over, the belt turn but the car acts like its getting no gas; the fuel pump and filter are brand new and when i spray starter fluid into the air intake the car wont start. My wife thinks she might have heard a pop fifteen min. before the car stalled but isnt sure. I am also confused cause i read on three web sites the non-turbo GLT is a non-interference but the turbo GLT is interference
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Re: 1995 Volvo 850 engine question

Postby polskamafia mjl » 21 Feb 2010, 03:50

Almost all Volvo's starting back in the early 80's have interference engines and all 850 and modern Volvo's have interference engines. I don't believe there is any easy fix to this. You have to find out what the damage is.
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Re: 1995 Volvo 850 engine question

Postby Ozark Lee » 21 Feb 2010, 07:41

It could be that your timing belt tensioner failed. If the last timing belt change was properly done there would be a plastic spacer snapped in on the top of the tensioner after it was deployed. That spacer is there to try to prevent catastrophic engine damage in the event that the tensioner fails. It doesn't always work but it sure worked on my '94 when the original tensioner blew out around 205k miles. The belt was sloppy but it never slipped. I caught it very soon due to the noise of the belt rattling around and parked the car until the replacement parts arrived. No slip on the belt and no damage to the engine.

Most are not as fortunate as I was though and the belt will slip. It becomes a matter of how much. If you are off one tooth just line things back up and replace the timing components (belt, tensioner, rollers, and I would suggest the water pump as well). If you are off by two teeth things get dicey but I would try the same thing. If you are off by more than two teeth then it is time to decide about the engine - repair or replace.

Use a bungee cord or an assistant holding the tensioner taught to hold the timing belt taught and crank it around by hand to the timing marks and see where you are. Where all of the marks line up in the end will give us a better idea of how to advise you on your next step.

...Lee
'94 850 N/A
'96 850 N/A
'96 Platinum Edition Turbo
'98 S70 T5
'99 V70XC - RIP Killed by a drunk driver.
Previous: 1989 740 GLT
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Re: 1995 Volvo 850 engine question

Postby krisncilla » 21 Feb 2010, 15:20

Thank you for the help. One more question. If I had blown the engine and screwed up the valves would I hear knocking from my engine or wouldnt my car freeze and not crank over? What are the signs for blown valves
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Re: 1995 Volvo 850 engine question

Postby Ozark Lee » 21 Feb 2010, 17:02

The starter motor is tougher than the valves and most certainly the inertia of a running engine and a moving car will kill the valves. My suggestion is to do nothing until you know the timing belt is proper but from there you can simply loosen the spark plugs about 1 turn and listen for the "Pffft" sound on each cylinder as the car gets cranked by the starter. No "Pffft" means no compression. No compression means a bad / bent valves on that cylinder.

...Lee
'94 850 N/A
'96 850 N/A
'96 Platinum Edition Turbo
'98 S70 T5
'99 V70XC - RIP Killed by a drunk driver.
Previous: 1989 740 GLT
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1972 142 Grand Luxe
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Re: 1995 Volvo 850 engine question

Postby krisncilla » 21 Feb 2010, 18:03

okay so i took apart the case to see if the belt was in place...the belt is intact, it looks worn but none of the teeth look off...so my next step would be to replace the belt? and if so, where do i find the engine number? i called autozone for a belt and they have one in stock but i cant find the engine number that they want anywhere...the one i saw under the hood has numbers and letters..and its not what they have listed online.ideas?
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Re: 1995 Volvo 850 engine question

Postby Pauloil » 21 Feb 2010, 18:08

essentially, you have a no start situation. How did the mech. come to the conclusion this was from timing belt? what does the belt look like and is it still tight? could be a sensor or bad relay. search no start discussions and report back what the timing belt looks like...
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Re: 1995 Volvo 850 engine question

Postby jblackburn » 21 Feb 2010, 18:15

For a timing belt, I'm guessing they're asking for this one?

Image

It's on the fuel rail cover on the front of the engine. If you can't find it, just give them my engine number, mine's the same as yours is. It's the late-98 & later cars that have a different tensioner.
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Re: 1995 Volvo 850 engine question

Postby Pauloil » 21 Feb 2010, 18:16

99 V70XC 158K

95 850glt 188K
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Re: 1995 Volvo 850 engine question

Postby krisncilla » 21 Feb 2010, 19:09

Okay the timing belt is tight and the teeth look a little worn but everything is on the sprokets. I put a computer on and the trans range circuit code came up. I tried starting fluid in the air flow but no good
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Re: 1995 Volvo 850 engine question

Postby jblackburn » 21 Feb 2010, 20:41

That code wouldn't cause a no-start condition.

If the timing belt looks ok, can you see the timing marks on the camshafts? Do they line up ok?

If that looks alright, I'd check next for spark. Pull out a plug or two and lay it on top of the engine, disconnect the other wires so it won't try to run on those cylinders, and crank it.
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A learning experience is one of those things that says, "You know that thing you just did? Don't do that."

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