Squeal while on throttle

WestCoastr · Post by **WestCoastr** » Tue Feb 26, 2019 7:46 pm

So today I finally started her up after replacing the head. Good news, after bleeding the air out of the fuel lines. She fired up! (yay me). Now for the bad news:

I didn't run it for more than 8 mins or so due to a couple things:

1. There was a high pitched squeal as soon as the RPMs went a bit above idling. I'm really not sure on this one. Thoughts? It almost sounds like a pulley. Could my belt tension be off? it's really hard to pinpoint other than being somewhere near the front.

2. Coolant was leaking from the lower rad hose. The previous owner had installed some sort of sensor in the middle of the lower rad hose that has a plug in it. I choose to re-use the hose as the condition looked fine but the coolant appears to be leaking through the actual plug. I'm going to replace the hose tomorrow and ditch the wiring. Any thoughts on what this is used for? My deli spent alot of time in the cold in her previous life. There is a similar wire going to a DIY oil pan heater. I can snag a photo if anyone is interested.

The main concern is defiantly the squeallllling.

izack98 · Post by **izack98** » Tue Feb 26, 2019 9:23 pm

Does the squealing go away when it's idling?
Does it just squeal when you are accelerating and not when you back off on the throttle? This is pretty indicative of a belt not tensioned correctly.

Is the plug in the lower rad hose a power plug that plugs into a home outlet? If so it could be a recirculating heater. You plug it in and it heats the coolant and circulates (sort of) through the engine. It helps with starts in cold weather.
Sounds like the previous owner needed help with cold weather starts.

If you can post pics that would help to identify it.

If that's what it is, and it's leaking, I'd just remove it and replace the lower rad hose.

WestCoastr · Post by **WestCoastr** » Wed Feb 27, 2019 12:18 am

Yes, it goes away as soon as I lay off the throttle.

and yes, its a home outlet which now appears melted and leaking coolant through the outlet.

I'll post the photo tomorrow when I get it off.

Cheers

WestCoastr · Post by **WestCoastr** » Wed Feb 27, 2019 9:18 pm

I'd say ya nailed it.

: Stupid thing.jpg (123.82 KiB) Viewed 7369 times

Now for the even bigger issues:

After swapping the hose and finding my alternator belts way out of spec (the loud squealing) I adjusted those and fired it up again. During the initial start up it was puffing alot of dark grey smoke but I ran it for such a short period that I didn't consider it an issue. Today I let it run for about 15mins just getting the temp gauge to climb a little. Unfortunately, the dark smoke never left. My hunch is the timing is off. It doesn't fire up all that easily in comparison to before the rebuild. Would you agree its a timing issue? Do I just need to run it longer? or maybe a IP/Injector issue?

Post by **Growlerbearnz** » Thu Feb 28, 2019 5:20 pm

Check the timing first. During a rebuild it's easy for a belt to slip one tooth. You only need to remove the top timing belt cover: http://www.delica.ca/forum/viewtopic.php?f=94&t=17654

Did you remove the injection pump when replacing the head?

WestCoastr · Post by **WestCoastr** » Thu Feb 28, 2019 8:23 pm

https://www.youtube.com/watch?v=EdNWDyG ... e=youtu.be

This was about 15mins after start up. Followed it up with a 15min drive. Felt pretty sluggish. Trouble accelerating. I'm in the process of moving so driving it was better than towing. Its defiantly got a bit of a knocking noise but I figure the valves will need another adjustment. Maybe a timing belt slip. I'll have a look once I'm settled into my new place. Appreciate any comments on how she sounds/looks.

WestCoastr · Post by **WestCoastr** » Fri Mar 01, 2019 7:11 pm

Also,
No I didn't remove the IP Growler. Maybe a few bumps when I was working around it though.

WestCoastr · Post by **WestCoastr** » Mon Mar 04, 2019 6:53 pm

I was able to check the timing today. With the cam and IP right on their marks it appears the crank pulley is about 5mm out. Is it fair to say the crank sprocket is probably a tooth off?

WestCoastr · Post by **WestCoastr** » Sun Mar 31, 2019 12:34 pm

Soo, popped off the crank pulley again today. I guess I was hoping to see that the crank sprocket was off a tooth but everything actually looks bang on. What could be causing the brutal smokey and powerless performance since the head replacement? I'm at the point where a tow to the shop my be a better plan. Thoughts?

Post by **Growlerbearnz** » Sun Mar 31, 2019 1:47 pm

It's more accurate to leave the crank pulley in place and use the timing marks cast into the lower plastic timing cover. Still, being one tooth out on the timing belt would result in the crank pulley timing mark being nearly 20mm off- the sort of thing that's really obvious.

The next step would be a compression test, just to make sure everything in the engine is ok, and then turning the engine over by hand and checking that the valves actually open when they're supposed to. (You did refit the woodruff key to the camshaft when installing the cam pulley, right?

)

I hate the following thought because it's coincidental with changing the cylinder head, and coincidence is suspicious, but:
Maybe try cleaning the injector pump fuel screens (inside the banjo fittings for fuel inlet and outlet, pictures here: http://www.delica.ca/forum/viewtopic.ph ... 4&start=30) and if they're dirty, change the fuel filter.