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Allegro/P-30

A place to share information about and to get help with your Tiffin Allegro and its P-30 Chevy chassis. I'm amazed at the seemingly infinite combinations of floor plans throughout the years. 

Members: 23
Latest Activity: Oct 4

Discussion Forum

Removed the Roof Rack 3 Replies

Well after years of contemplation, I finally decided to remove the roof rack. I love the classic Allegro look, but I just couldn't keep up with the leaks anymore. From the factory, there are 44…Continue

Started by Jim Stoltz. Last reply by Jim Stoltz Oct 4.

Spring check up 6 Replies

Well getting ready for this years trip. New show faucet, new shocks, changed trans. fluid and adjusted choke. The only problem I can't seem to figure out is why I keep burning up alternator belts.…Continue

Started by Philip Wolsonovich. Last reply by Philip Wolsonovich Jul 22.

P30 Rear Shock Mount 4 Replies

Hi all! It's been a while since I've dropped by. I hope everyone is doing well.I'm gearing up for the first trip out to NASCAR next weekend and have a long list of small stuff to fix before then.…Continue

Started by Jim Stoltz. Last reply by Jim Stoltz Jul 16.

Allegro Electrical Troubleshooting 2 Replies

I like to get some input on some electrical issues I'm having, specific to the headlights and signals. When the headlights are off, the signals work as they should (except my transmission temp light…Continue

Started by Daniel Long. Last reply by Daniel Long May 3.

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Comment by Daniel Long on September 6, 2017 at 7:59pm

Managed to get a few NY trips under our belt on the P30 and only one mishap with the governor gear getting stripped. fixed that pretty quick and was back on the road. Now looking to go a bit further with the Allegro this Fall down further south.

Comment by Jim Stoltz on August 15, 2017 at 9:15am

Yeah the pumps seize up, which is part of the problem. The other is that the little air tubes on the manifolds rust out and leak. My replacement engine is a GM Performance crate engine ("off road use") so it didn't have the air ports on the manifolds. They make an idler to replace the air pump. Not sure. If memory serves removing it makes a pretty long run from the crank to the alternator. The belt slips unless I keep it really tight.

Comment by Russ Johnson on August 15, 2017 at 9:09am
The mechanic shop that removed all that air pump stuff on my mh left the pump itself so they did not have to find a new belt. Well it seized up on us on the major trek and we were stranded along side of the freeway in eastern Montana. Had a great mechanic shop there. They removed the pump and got a replacement belt out of billings mt. So we were down on Fri and Saturday. But we were set up properly when we hit the road again. Long story short---do the job right the first time.
Comment by Daniel Long on August 14, 2017 at 8:46pm

All hoses lead to this crazy air pump thing up front. I have no issue removing it and redoing the alternator belt but I seem to think that this belt is not the same one for the alternator. Could be wrong but will look. From there I'll plug up holes for the hoses and see how she runs.

Comment by Jim Stoltz on August 14, 2017 at 8:06pm

Mine doesn't have an EGR, but it does (did) have a belt-driven air pump. They are problematic. NJ doesn't have inspection (visual or otherwise) so I removed it. Just need a longer belt for the alternator.

Comment by Daniel Long on August 14, 2017 at 7:45pm

This engine has about 3 hoses hooked up to the air filter housing. One looks like a breather (foam filter on the 10 position) and two other plastic pieces at 3 and 5 o'clock. These hook up into some belt-driven unit in front of the air filter. Guessing some kind of emissions system.

Comment by Daniel Long on August 14, 2017 at 7:30pm

I was wondering on the EGR. I have her parked and running and you can detect a low whistle. Put her in gear and the vacuum drops a bit. I would consider it a great victory if I could just stop that giant sucking sound when driving.

Comment by Lakota Wolf on August 14, 2017 at 7:01pm

FYI,, on additional Air Leak,,,,, Check your EGR valve,,, a quick test is to remove the hose from the EGR and plug it and take a test drive,,, 90% of additional air whistles I have diagnosed was the EGR..    Hope this is your solution....

Comment by Jim Stoltz on August 14, 2017 at 6:37pm

Well the vacuum leak takes a back seat now. I pulled it out of its spot because the ramps were sinking. I noticed something dripping on the driveway. Black tank is leaking. Looking at it, it's an old crack repair that has opened back up. I have no idea how it happened, or maybe it was just due. It wasn't a great repair. So I'm looking at Plasti-Mend ABS repair. The problem may be that the crack isn't even - there's a lip on one edge. I tapped it with a rubber mallet hoping it would pop back together but no dice. I guess it's been like that for a long time. Good news is that there's just some fresh water and sanitizer in there. I need to drain it and figure out what to do next.

Comment by Daniel Long on August 14, 2017 at 6:14pm

Yeah, it's something like an additional air noise that starts after running quiet and normal, like someone opens up an air valve. The strange thing is that the vacuum gauge doesn't show an appreciable change. With old BMW's and K-Jet I'm familiar with vacuum leaks and will swap out any of the lines I can get to before the next trip.

 
 
 

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Discussion Forum

Removed the Roof Rack 3 Replies

Started by Jim Stoltz. Last reply by Jim Stoltz Oct 4.

Spring check up 6 Replies

Started by Philip Wolsonovich. Last reply by Philip Wolsonovich Jul 22.

P30 Rear Shock Mount 4 Replies

Started by Jim Stoltz. Last reply by Jim Stoltz Jul 16.

Blog Posts

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On The Home Stretch

Posted by Dawn Michelle on September 28, 2017 at 6:13pm — 12 Comments

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