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Old 04-13-2021, 07:16 PM   #21
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Its been a while, but I finally have an update. I went thru and did compression checks, and have excellent compression and injectors are working. With the blow-by problem I'm assuming I have a burnt or bent valve. I hope that I didn't scar the piston if a valve was hanging since I let it run for a little while. I'm hoping the financial side of things won't hurt me too badly, and wondering if I should go through the trouble of replacing the valves/seals or just get a reman'd head. I've never pulled a head, so I have plenty of researching to do.
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Old 04-13-2021, 07:18 PM   #22
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Originally Posted by Zerksy View Post
Its been a while, but I finally have an update. I went thru and did compression checks, and have excellent compression and injectors are working. With the blow-by problem I'm assuming I have a burnt or bent valve. I hope that I didn't scar the piston if a valve was hanging since I let it run for a little while. I'm hoping the financial side of things won't hurt me too badly, and wondering if I should go through the trouble of replacing the valves/seals or just get a reman'd head. I've never pulled a head, so I have plenty of researching to do.
It'll be alright

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Old 04-13-2021, 07:49 PM   #23
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Originally Posted by Zerksy View Post
Its been a while, but I finally have an update. I went thru and did compression checks, and have excellent compression and injectors are working. With the blow-by problem I'm assuming I have a burnt or bent valve.
So, with a bent or burnt valve, I'd expect compression to show poorly on that Cyl.

Have you done a leak-down test? Please consider this, it can tell much...
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What he is saying is the aerodynamics of a D21 is a brick in the wind.
Probably at least as bad as a Jeep so worse than a cow.
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Old 04-13-2021, 08:05 PM   #24
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So, with a bent or burnt valve, I'd expect compression to show poorly on that Cyl.

Have you done a leak-down test? Please consider this, it can tell much...
Yep. Thats the next step I"m going to take. I just have to get my hands on the equipment to do it.
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Old 04-13-2021, 08:10 PM   #25
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You'll need an air compressor and a compression tester, where the hose of the tester (can) plug into the compressor and put air into the cylinder. Should only need ~40-60psi to "know"... so a regulator on the compressor is suggested.

HTH...
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What he is saying is the aerodynamics of a D21 is a brick in the wind.
Probably at least as bad as a Jeep so worse than a cow.
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Old 04-13-2021, 08:25 PM   #26
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Originally Posted by 89'HBV6 View Post
You'll need an air compressor and a compression tester, where the hose of the tester (can) plug into the compressor and put air into the cylinder. Should only need ~40-60psi to "know"... so a regulator on the compressor is suggested.

HTH...
thank you. Going to hunt a tester ASAP
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Old 04-13-2021, 08:27 PM   #27
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thank you. Going to hunt a tester ASAP
Ummmmmmmm, above you stated "I went thru and did compression checks, and have excellent compression and injectors...".

So, am I missing something?
How did you "check your compression"?
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What he is saying is the aerodynamics of a D21 is a brick in the wind.
Probably at least as bad as a Jeep so worse than a cow.
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Old 04-13-2021, 08:36 PM   #28
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Originally Posted by 89'HBV6 View Post
Ummmmmmmm, above you stated "I went thru and did compression checks, and have excellent compression and injectors...".

So, am I missing something?
How did you "check your compression"?
Used a compression tester, I have a cheap one that doesn't release its pressure after I'm done cycling the engine unless I press a valve on the side, each cylinder pushed up to 160-165 psi. I'd need a leak-down tester
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Old 04-13-2021, 09:02 PM   #29
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OK. Well, you can make your own... A "leak down test" is really just a process. You can use many things to make what plugs into the cylinder. Even a hand held/pressed rubber grommet. Doesn't "need" to screw in, but this does make things easier.

Just break down and get a better compression tester. You got a compressor, right?


EDIT: Check your PM...
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Quote:
Originally Posted by Deerhurst
What he is saying is the aerodynamics of a D21 is a brick in the wind.
Probably at least as bad as a Jeep so worse than a cow.

Last edited by 89'HBV6; 04-13-2021 at 09:07 PM.
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Old 04-24-2021, 01:02 AM   #30
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Alas. An update. Got some injectors, pulled the fuel rail off, blew out the rail and fuel lines, and installed the new injectors. Turned the key with a pit in my stomach. Engine fired off without any issues, smoked like the devil from the leftover remnants of the marvel I put in the cylinder early on, but ran and cleared up well. Even better news is, I got someone to help me bleed the clutch slave cylinder, and it goes into gear with the pedal at the floor now, and drove it few hundred yards. Now to replace some odds and ends such as the thermostat. Also need to learn or figure out how to replace the fusible links as I don't have blinkers, horn or dash functions for some reason. I feel closer than ever to getting her on the road. Would like to find out what style rims it has, would there be stamps in the rims that state the code of what they are?
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