1998 S70 T5 Low Compression after stall, will not retart

Trilarry · Post by **Trilarry** » 28 Jan 2007, 20:22

Thanks for all the responses.
I have a hydraulic tensioner. Where can I find this along with the belt. Hopefully not the dealer. I will start on this tommorow. Pfeener said "just the basics, fuel and spark at the right time and it should start"
Anything against Autozone for timing belt?
TRI

greasefingerss · Post by **greasefingerss** » 28 Jan 2007, 20:47

Since your vehicle has not been on the road for a while, I assume that it is not imperative to get it roadworthy tomorrow? Having said that, I would use the best belt that I could get my hands on. I like Dayco for belts, but I just ordered my timing belt from FCP for $ 27. I also use Napa for parts. I use all other chain stores for fluids and non-critical stuff.

FCP

Post by **MadeInJapan** » 28 Jan 2007, 21:21

Eeuroparts.com is good and fairly fast...a day or two faster than fcpgroton.com in my experience and shipping is free from $39 on up. Timing belt is made by Continental...I personally wouldn't trust any other. Even a belt from the dealer that says "Volvo" on it, from what I understand is really a Conti belt.

Post by **pfeener** » 29 Jan 2007, 04:39

If you want all genuine Volvo parts; myswedishparts.com sells them.

Trilarry · Post by **Trilarry** » 30 Jan 2007, 19:21

Hey Guys,

got a confession to make. The next morning I verified my timing marks acording to the pictures that were posted and I found the marks on the crankshaft pulley lined up with the mark on the block along with both camshaft pulleys. I mistakenly thought that the mark on the harmonic balancer was the true crankshaft mark (another rookie mistake).

So in saying that it was/is still a mystery why my car stalled. I rushed off to Uhaul and rented a tow dolly and dropped my Blue S70 T5 off to the Volvo specialist who after 24 hours is scratching his head so hard I thought it was snowing in his shop.

I was too embarassed to admit this snafu but my wife said I could be a good example of humility if I fessed up to you guys who tried so hard to help me. I was very pleased that you all were pleased as you to thought I had found the problem.

This is a great forum and I was helped thoroughly by the responses and friendliness.

I will keep you all informed on what the head scratching specialist come up with. He agrees with Pfeener about the fuel washing of the cylinders.
Later
Guys
Tri

Trilarry · Post by **Trilarry** » 31 Jan 2007, 19:25

Here's the skinny!

The specialist could not get good compression out of the cylinders, so he filled them with tranny fluid and let sit overnight thinking it would loosen the stuck rings. Well it did not work, so I gave him the okay to tear into it. What he found was slight evidence that the pistons hit the valves bending them slightly enough so that they could not seat properly explaining why I only got 75 psi compression.

What caused this since my timing marks were all aligned. Well the shop I purchased the Volvo from last April replaced the waterpump and timing belt, but failed to put the crankshaft nut on. I did notice this when I checked my timing. The sprocket on the crankshaft moved so much that it eventually ate up all the grooves on the sprocket where the crankshaft fits into therefore slipping just enough to allow the pistons to slightly bang the valves.

To test this theory the bottom of the head was turned up and was fill with fluid and the valves were closed as far as they could go. We then blew air into the head and watched the air bubble come out of the bottom of the valves.

Well I will be getting new valves and maybe will rering the pistons along with rod bearings. I'm suppose to get the estimate tommorow.
That's it, sorry for the long story.
Tri

Post by **MadeInJapan** » 31 Jan 2007, 20:11

Any recourse with the shop that did the shoddy work?

greasefingerss · Post by **greasefingerss** » 31 Jan 2007, 20:51

That is an interesting story. Thanks for sharing that. Who would have guessed that the nut was not on! Sorry to hear about this. It will not be as cheap as you would have wanted it to be. At least the mystery is solved.

Trilarry · Post by **Trilarry** » 31 Jan 2007, 21:47

I will try and talk to the seller.
Tri.

Post by **pfeener** » 01 Feb 2007, 08:28

I wonder why they had the nut off the end of the cranckshaft pulley? Not a normal thing when you change the timing belt.

Well we were right on about the valve timing being off; there was just no way we could get to this type of failure without laying an eyeball on it.

My motto; if I can do the work myself I always do; I trust myself but not too many others.