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by wieselaj
04 Apr 2018, 08:16
Forum: S60, V70, V70-XC 2001-07
Topic: 2003 XC70 - Low Compression after head rebuild
Replies: 23
Views: 5866

Re: 2003 XC70 - Low Compression after head rebuild

I received the additional ignition coil yesterday. Installed that on the misfiring cylinder, buttoned up the rest of the hoses, tubes, mounts, etc. and turned the key. She purred like a kitten. I have driven about 50 trouble free miles over the last 24 hours and the turbo smoke has subsided. I think...
by wieselaj
02 Apr 2018, 12:16
Forum: S60, V70, V70-XC 2001-07
Topic: 2003 XC70 - Low Compression after head rebuild
Replies: 23
Views: 5866

Re: 2003 XC70 - Low Compression after head rebuild

Correction (to my preceding post), I did have as much play as the guy in the video after cleaning the splines on the gear and the shaft. However, the innermost quarter inch of the shaft is not splined, so the corresponding splines on the gear were in much better shape. When I pulled the gear out a b...
by wieselaj
27 Mar 2018, 07:31
Forum: S60, V70, V70-XC 2001-07
Topic: 2003 XC70 - Low Compression after head rebuild
Replies: 23
Views: 5866

Re: 2003 XC70 - Low Compression after head rebuild

I tried to re-post the images of the splines in my comment above... hope that helps. Lighting on the shaft splines is not great so maybe I will try to get a better picture after i spend a little more time cleaning it up. I found a new crankshaft gear on ebay for 40 bucks so I pulled the trigger on t...
by wieselaj
26 Mar 2018, 14:28
Forum: S60, V70, V70-XC 2001-07
Topic: 2003 XC70 - Low Compression after head rebuild
Replies: 23
Views: 5866

Re: 2003 XC70 - Low Compression after head rebuild

Just to clear up a couple of questions posed earlier in the thread.... I did not take the vvt hubs or cam sprockets off of the cams. I do not believe that the mechanic did either. The back of the intake cam has the slot slightly above center, with the extra notch above center, and the writing below ...
by wieselaj
26 Mar 2018, 11:54
Forum: S60, V70, V70-XC 2001-07
Topic: 2003 XC70 - Low Compression after head rebuild
Replies: 23
Views: 5866

Re: 2003 XC70 - Low Compression after head rebuild

The pulley was very difficult to remove with the claw puller, so I knew that I wasn't going to be happy with what I found. The splines on the pulley are in really tough shape. It might be hard to see in my pics, but they were nearly rounded flat. The splines on the crank are in better condition but ...
by wieselaj
26 Mar 2018, 07:09
Forum: S60, V70, V70-XC 2001-07
Topic: 2003 XC70 - Low Compression after head rebuild
Replies: 23
Views: 5866

Re: 2003 XC70 - Low Compression after head rebuild

Well... i have only been able to pull the timing belt pulley about an 1/8 of an inch out so far so I haven't gotten a good look at the splines. Once the crud/rust broke free, i can clearly see some rotational wiggle. Not good. Probably rotates a half a tooth without the crank moving. I am going to p...
by wieselaj
25 Mar 2018, 13:19
Forum: S60, V70, V70-XC 2001-07
Topic: 2003 XC70 - Low Compression after head rebuild
Replies: 23
Views: 5866

Re: 2003 XC70 - Low Compression after head rebuild

I would like to revisit one question i asked in the original post... Is it possible for the crank to be off one full turn? It doesn't make sense to me, but I saw this in another post from someone with an S60 that jumped time... https://www.matthewsvolvosite.com/forums/viewtopic.php?f=9&t=84244&a...
by wieselaj
25 Mar 2018, 13:04
Forum: S60, V70, V70-XC 2001-07
Topic: 2003 XC70 - Low Compression after head rebuild
Replies: 23
Views: 5866

Re: 2003 XC70 - Low Compression after head rebuild

I let the seafoam sit in the cylinders for about 24 hours and tried the compression test again today. No change. Every cylinder measured right around 60 PSI dry and roughly 95-110 PSI wet. Certainly a big jump. I have read that if pressure jumps more than 10% than its probably the pistons/rings. Odd...
by wieselaj
24 Mar 2018, 09:41
Forum: S60, V70, V70-XC 2001-07
Topic: 2003 XC70 - Low Compression after head rebuild
Replies: 23
Views: 5866

Re: 2003 XC70 - Low Compression after head rebuild

Let me post a clarification/correction here... The pics of the front and rear of the cams above were taken after I had rotated the cams past the alignment marks by a quarter turn and then backed up to alignment. I just went back down and rotated the engine clockwise to the alignment marks (no turn p...
by wieselaj
24 Mar 2018, 09:34
Forum: S60, V70, V70-XC 2001-07
Topic: 2003 XC70 - Low Compression after head rebuild
Replies: 23
Views: 5866

Re: 2003 XC70 - Low Compression after head rebuild

Well... I am wondering about the timing. I will show pics of the front of the engine. Where - to my eyes anyway - it looks like the timing gear is perfectly aligned at the cams and the crank. On the back of the engine though... the slots on the cams aren't parallel to the seem of the head or to each...