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Old 12-14-2014, 01:23 PM   #15
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1991 35' Airstream 350
Austin , Texas
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Well, after extensive review of mechanicals (by the local GM dealer) as well as the dealer PDI being completed, looks like the deal to acquire the 350LE will go ahead. Many thanks particularly to Vycan and yxbuoy for their comments and insight. The dealer is evasive regarding the door chime!!
One question. I've asked the dealer to complete a cylinder compression check. What should the "average" compression psi be for the 454 for a 60,000 mile engine that has been serviced regularly ?
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Old 12-14-2014, 03:37 PM   #16
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Originally Posted by chriscraw View Post
One question. I've asked the dealer to complete a cylinder compression check. What should the "average" compression psi be for the 454 for a 60,000 mile engine that has been serviced regularly ?

An actual number is not as important as the variation between cylinders. Highest to lowest should be within 15 lbs. Lots of factors and variations in the heads it got, cam profile, temperature, battery cranking power, even throttle position would effect the number.

If you are doing a compression test the condition of the plugs is also a good indicator of the health of the engine.

I'd recommend getting the door bell checked out by a qualified piano tuner. Dink donk is not acceptable.
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Old 12-14-2014, 04:25 PM   #17
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Quote:
Originally Posted by chriscraw View Post
Well, after extensive review of mechanicals (by the local GM dealer) as well as the dealer PDI being completed, looks like the deal to acquire the 350LE will go ahead. Many thanks particularly to Vycan and yxbuoy for their comments and insight. The dealer is evasive regarding the door chime!!
One question. I've asked the dealer to complete a cylinder compression check. What should the "average" compression psi be for the 454 for a 60,000 mile engine that has been serviced regularly ?
Once you get the rig to Austin and need someone to help you figure stuff out, don't hesitate to stop by for a visit. I am in North Austin and have taken a couple of these Airstreams apart.
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Old 12-14-2014, 05:17 PM   #18
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I was told that a piano tuner wouldn't know crap about a doorbell. You need a Glockenspiel tuner! Sorry...
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Old 12-14-2014, 07:44 PM   #19
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you guys are making more worried about my door bell then my continued rain water leaks!


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Old 12-15-2014, 03:11 AM   #20
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dadstoy... life is about priorities :-p
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Old 12-16-2014, 08:57 AM   #21
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Hey boys, enough with the doorbell!!!..hey PeterH..good to know you're in the Austin area with a 345. Current plan, assuming the deal goes through is to head to Austin from Seattle in mid-Jan via California, Arizona and New Mexico. By the time I hit southern California, I should know if the 350LE is good for the rest of the voyage don't you think ?
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Old 12-16-2014, 07:16 PM   #22
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Hey boys, enough with the doorbell!!!..hey PeterH..good to know you're in the Austin area with a 345. Current plan, assuming the deal goes through is to head to Austin from Seattle in mid-Jan via California, Arizona and New Mexico. By the time I hit southern California, I should know if the 350LE is good for the rest of the voyage don't you think ?
Will be glad to give you my cell number for anything NOT engine or transmission related in route..... For that there are far better resources here!

For my last trip I had BKahler and Keyair on speed dial.... Almost hit the send button several times...

Oh and get Good Sam road side if you don't have it already. All it takes is one call and it pays for itself!!

Keep us posted enroute!
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Old 12-16-2014, 09:51 PM   #23
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Chriscraw:
I'm in Dripping Springs with a 325 if you need help in the Austin area consider me a backup....


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Old 12-17-2014, 07:40 PM   #24
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Ahoy Chriscraw. Congrats on your new motorhome. I'm located in northern Az
Chino valley. And would be happy to assist in any way I can on your trip thru the area.
I've had my 345 for just over a year now, and am full timing aboard.
Have been mostly DIY on getting things sorted. So have been on a steep learning curve. But it is fun to move forward with the needs of the Moho.

That offer from Peter in Austin is golden. I stopped in at his place on my way from Fla heading this way just after getting my unit. Last year, and received great Aloha and help while there.

Best of luck in getting ready to start your trip, PM me for contact info. For your contact list.

Cheers Richard
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Old 12-18-2014, 10:14 AM   #25
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Thanks to for all these supportive posts and some comfort on the long haul back to Austin.
The Compression test on the 454 just came back. The cylinder PSI#'s are;-
#1 158
#2 155
#3 157
#4 153
#5 154
#6 155
#7 156
#8 149
Anyone care to comment on these results ? My best and perhaps ill-informed guess is that they look pretty good both in psi ratings and variance for a 60,000 mile 1991 vintage 454 ?
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Old 12-18-2014, 01:06 PM   #26
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It is more important they are all similar than anything else. Your greatest disparity is 9psi, with about 154 average. That puts you at +-5psi from average.

For the geek in me: What altitude, ambient temperature, and humidity occurred during the test?
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Old 12-18-2014, 01:23 PM   #27
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Originally Posted by chriscraw View Post
Thanks to for all these supportive posts and some comfort on the long haul back to Austin.
The Compression test on the 454 just came back. The cylinder PSI#'s are;-
#1 158
#2 155
#3 157
#4 153
#5 154
#6 155
#7 156
#8 149
Anyone care to comment on these results ? My best and perhaps ill-informed guess is that they look pretty good both in psi ratings and variance for a 60,000 mile 1991 vintage 454 ?

I'd say they look acceptable. Be nice if that 149 was a bit higher. Did they comment on the look of the plugs?
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Old 12-18-2014, 05:03 PM   #28
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Quote:
Originally Posted by chriscraw View Post
Thanks to for all these supportive posts and some comfort on the long haul back to Austin.
The Compression test on the 454 just came back. The cylinder PSI#'s are;-
#1 158
#2 155
#3 157
#4 153
#5 154
#6 155
#7 156
#8 149
Anyone care to comment on these results ? My best and perhaps ill-informed guess is that they look pretty good both in psi ratings and variance for a 60,000 mile 1991 vintage 454 ?
Not surprised that 8 is the black sheep with all the congestion of the starter motor/solenoid and heat shields being right next to #8 exhaust.
Same place where you often find the exhaust manifold cracked. Working on one as we ponder 149 ...
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